bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/Layer0Utils.java

   1 /*******************************************************************************
   2  * Copyright (c) 2012 Association for Decentralized Information Management in
   3  * Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.db.layer0.util;
  13
  14 import java.io.IOException;
  15 import java.util.ArrayList;
  16 import java.util.Collection;
  17 import java.util.Collections;
  18 import java.util.Comparator;
  19 import java.util.HashSet;
  20 import java.util.List;
  21 import java.util.Map;
  22 import java.util.Set;
  23 import java.util.TreeSet;
  24
  25 import org.eclipse.core.runtime.IProgressMonitor;
  26 import org.eclipse.core.runtime.NullProgressMonitor;
  27 import org.eclipse.core.runtime.SubMonitor;
  28 import org.simantics.databoard.Bindings;
  29 import org.simantics.databoard.Datatypes;
  30 import org.simantics.databoard.adapter.AdaptException;
  31 import org.simantics.databoard.adapter.Adapter;
  32 import org.simantics.databoard.adapter.AdapterConstructionException;
  33 import org.simantics.databoard.binding.Binding;
  34 import org.simantics.databoard.binding.NumberBinding;
  35 import org.simantics.databoard.binding.StringBinding;
  36 import org.simantics.databoard.binding.error.BindingException;
  37 import org.simantics.databoard.binding.mutable.MutableStringBinding;
  38 import org.simantics.databoard.parser.repository.DataTypeSyntaxError;
  39 import org.simantics.databoard.parser.repository.DataValueRepository;
  40 import org.simantics.databoard.primitives.MutableString;
  41 import org.simantics.databoard.type.ArrayType;
  42 import org.simantics.databoard.type.BooleanType;
  43 import org.simantics.databoard.type.ByteType;
  44 import org.simantics.databoard.type.Datatype;
  45 import org.simantics.databoard.type.DoubleType;
  46 import org.simantics.databoard.type.FloatType;
  47 import org.simantics.databoard.type.IntegerType;
  48 import org.simantics.databoard.type.LongType;
  49 import org.simantics.databoard.type.MapType;
  50 import org.simantics.databoard.type.NumberType;
  51 import org.simantics.databoard.type.OptionalType;
  52 import org.simantics.databoard.type.RecordType;
  53 import org.simantics.databoard.type.StringType;
  54 import org.simantics.databoard.type.UnionType;
  55 import org.simantics.databoard.type.VariantType;
  56 import org.simantics.databoard.util.ObjectUtils;
  57 import org.simantics.db.ChangeSetIdentifier;
  58 import org.simantics.db.Operation;
  59 import org.simantics.db.ReadGraph;
  60 import org.simantics.db.RelationContext;
  61 import org.simantics.db.Resource;
  62 import org.simantics.db.Session;
  63 import org.simantics.db.Statement;
  64 import org.simantics.db.WriteGraph;
  65 import org.simantics.db.WriteOnlyGraph;
  66 import org.simantics.db.common.CommentMetadata;
  67 import org.simantics.db.common.Indexing;
  68 import org.simantics.db.common.StandardStatement;
  69 import org.simantics.db.common.primitiverequest.PossibleRelatedValue;
  70 import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;
  71 import org.simantics.db.common.request.DelayedWriteRequest;
  72 import org.simantics.db.common.request.ObjectsWithType;
  73 import org.simantics.db.common.request.PossibleChild;
  74 import org.simantics.db.common.request.PossibleIndexRoot;
  75 import org.simantics.db.common.utils.NameUtils;
  76 import org.simantics.db.exception.CancelTransactionException;
  77 import org.simantics.db.exception.DatabaseException;
  78 import org.simantics.db.exception.ServiceException;
  79 import org.simantics.db.layer0.adapter.CopyHandler;
  80 import org.simantics.db.layer0.adapter.CopyHandler2;
  81 import org.simantics.db.layer0.adapter.GenericRelationIndex;
  82 import org.simantics.db.layer0.adapter.PasteHandler;
  83 import org.simantics.db.layer0.adapter.impl.DefaultPasteHandler;
  84 import org.simantics.db.layer0.adapter.impl.TGRemover;
  85 import org.simantics.db.layer0.genericrelation.IndexedRelations;
  86 import org.simantics.db.layer0.internal.SimanticsInternal;
  87 import org.simantics.db.layer0.migration.OntologiesFromLibrary;
  88 import org.simantics.db.layer0.property.OrderedResource;
  89 import org.simantics.db.layer0.request.GlobalOntologies;
  90 import org.simantics.db.layer0.request.PossibleVariableIndexRoot;
  91 import org.simantics.db.layer0.request.PropertyInfo;
  92 import org.simantics.db.layer0.request.PropertyInfoRequest;
  93 import org.simantics.db.layer0.util.SimanticsClipboard.Representation;
  94 import org.simantics.db.layer0.variable.StandardGraphPropertyVariable;
  95 import org.simantics.db.layer0.variable.Variable;
  96 import org.simantics.db.service.ClusterCollectorPolicy;
  97 import org.simantics.db.service.ClusterControl;
  98 import org.simantics.db.service.ClusteringSupport;
  99 import org.simantics.db.service.CollectionSupport;
 100 import org.simantics.db.service.DebugSupport;
 101 import org.simantics.db.service.ManagementSupport;
 102 import org.simantics.db.service.UndoRedoSupport;
 103 import org.simantics.db.service.XSupport;
 104 import org.simantics.graph.db.TransferableGraphSource;
 105 import org.simantics.graph.db.TransferableGraphs;
 106 import org.simantics.graph.diff.Diff;
 107 import org.simantics.graph.diff.TransferableGraphDelta1;
 108 import org.simantics.graph.refactoring.GraphRefactoringUtils;
 109 import org.simantics.graph.representation.TransferableGraph1;
 110 import org.simantics.layer0.Layer0;
 111 import org.simantics.operation.Layer0X;
 112 import org.simantics.scl.compiler.environment.Environments;
 113 import org.simantics.scl.compiler.runtime.RuntimeEnvironment;
 114 import org.simantics.scl.compiler.top.SCLExpressionCompilationException;
 115 import org.simantics.scl.compiler.types.Type;
 116 import org.simantics.scl.osgi.SCLOsgi;
 117 import org.simantics.scl.runtime.function.Function;
 118 import org.simantics.scl.runtime.function.Function1;
 119 import org.simantics.scl.runtime.function.FunctionImpl1;
 120
 121 public class Layer0Utils {
 122
 123         @SuppressWarnings("rawtypes")
 124         public static final ThreadLocal SCL_GRAPH = new ThreadLocal();
 125
 126         final public static Binding datatype_binging = Bindings.getBindingUnchecked(Datatype.class);
 127
 128         public static Resource literal(WriteGraph g, String value) throws DatabaseException {
 129                 Layer0 L0 = Layer0.getInstance(g);
 130                 Resource r = g.newResource();
 131                 g.claimValue(r, value, Bindings.STRING);
 132                 g.claim(r, L0.InstanceOf, L0.String);
 133                 return r;
 134         }
 135
 136         public static Resource literal(WriteGraph g, double value) throws DatabaseException {
 137                 Layer0 L0 = Layer0.getInstance(g);
 138                 Resource r = g.newResource();
 139                 g.claimValue(r, value, Bindings.DOUBLE);
 140                 g.claim(r, L0.InstanceOf, L0.Double);
 141                 return r;
 142         }
 143
 144         public static Resource literal(WriteGraph g, int value) throws DatabaseException {
 145                 Layer0 L0 = Layer0.getInstance(g);
 146                 Resource r = g.newResource();
 147                 g.claimValue(r, value, Bindings.INTEGER);
 148                 g.claim(r, L0.InstanceOf, L0.Integer);
 149                 return r;
 150         }
 151
 152         public static void assert_(WriteGraph g, Resource type, Resource predicate, Resource object) throws DatabaseException {
 153                 Layer0 L0 = Layer0.getInstance(g);
 154                 Resource assertion = g.newResource();
 155                 g.claim(type, L0.Asserts, assertion);
 156                 g.claim(assertion, L0.InstanceOf, L0.Assertion);
 157                 g.claim(assertion, L0.HasPredicate, predicate);
 158                 g.claim(assertion, L0.HasObject, object);
 159         }
 160
 161         public static Resource relation(WriteGraph g, Resource parent, String name, Resource superrelation) throws DatabaseException {
 162                 Layer0 L0 = Layer0.getInstance(g);
 163                 Resource relation = g.newResource();
 164                 g.claim(relation, L0.SubrelationOf, superrelation);
 165                 g.claim(relation, L0.HasName, literal(g, name));
 166                 g.claim(parent, L0.ConsistsOf, relation);
 167
 168                 Resource superrelationInverse = g.getInverse(superrelation);
 169                 if(superrelationInverse != null) {
 170                         Resource inverse = g.newResource();
 171                         g.claim(inverse, L0.SubrelationOf, superrelationInverse);
 172                         g.claim(relation, L0.ConsistsOf, inverse);
 173                         g.claim(inverse, L0.HasName, literal(g, "Inverse"));
 174                 }
 175                 return relation;
 176         }
 177
 178         private static Resource getLiteralType(ReadGraph graph, Datatype type) throws DatabaseException {
 179                 Layer0 L0 = Layer0.getInstance(graph);
 180                 if(type instanceof DoubleType) return L0.Double;
 181                 else if(type instanceof StringType) return L0.String;
 182                 else if(type instanceof IntegerType) return L0.Integer;
 183                 else if(type instanceof LongType) return L0.Long;
 184                 else if(type instanceof FloatType) return L0.Float;
 185                 else if(type instanceof ByteType) return L0.Byte;
 186                 else if(type instanceof BooleanType) return L0.Boolean;
 187                 else if(type instanceof ArrayType) {
 188                         ArrayType at = (ArrayType)type;
 189                         if(at.componentType instanceof DoubleType) return L0.DoubleArray;
 190                         else if(at.componentType instanceof StringType) return L0.StringArray;
 191                         else if(at.componentType instanceof IntegerType) return L0.IntegerArray;
 192                         else if(at.componentType instanceof LongType) return L0.LongArray;
 193                         else if(at.componentType instanceof FloatType) return L0.FloatArray;
 194                         else if(at.componentType instanceof ByteType) return L0.ByteArray;
 195                         else if(at.componentType instanceof BooleanType) return L0.BooleanArray;
 196                         else if(at.componentType instanceof VariantType) return L0.VariantArray;
 197                 }
 198                 throw new DatabaseException("Unidentified literal type for datatype " + type);
 199         }
 200
 201         private static Resource getPossibleLiteralType(ReadGraph graph, String type) throws DatabaseException {
 202
 203                 Layer0 L0 = Layer0.getInstance(graph);
 204                 if("Double".equals(type)) return L0.Double;
 205                 else if("String".equals(type)) return L0.String;
 206                 else if("Integer".equals(type)) return L0.Integer;
 207                 else if("Long".equals(type)) return L0.Long;
 208                 else if("Float".equals(type)) return L0.Float;
 209                 else if("Byte".equals(type)) return L0.Byte;
 210                 else if("Boolean".equals(type)) return L0.Boolean;
 211                 else if("[Double]".equals(type)) return L0.DoubleArray;
 212                 else if("[String]".equals(type)) return L0.StringArray;
 213                 else if("[Integer]".equals(type)) return L0.IntegerArray;
 214                 else if("[Long]".equals(type)) return L0.LongArray;
 215                 else if("[Float]".equals(type)) return L0.FloatArray;
 216                 else if("[Byte]".equals(type)) return L0.ByteArray;
 217                 else if("[Boolean]".equals(type)) return L0.BooleanArray;
 218                 else if("[Variant]".equals(type)) return L0.VariantArray;
 219                 else if("Array Double".equals(type)) return L0.DoubleArray;
 220                 else if("Array String".equals(type)) return L0.StringArray;
 221                 else if("Array Integer".equals(type)) return L0.IntegerArray;
 222                 else if("Array Long".equals(type)) return L0.LongArray;
 223                 else if("Array Float".equals(type)) return L0.FloatArray;
 224                 else if("Array Byte".equals(type)) return L0.ByteArray;
 225                 else if("Array Boolean".equals(type)) return L0.BooleanArray;
 226                 else if("Array Variant".equals(type)) return L0.VariantArray;
 227                 else if("Vector Double".equals(type)) return L0.DoubleArray;
 228                 else if("Vector String".equals(type)) return L0.StringArray;
 229                 else if("Vector Integer".equals(type)) return L0.IntegerArray;
 230                 else if("Vector Long".equals(type)) return L0.LongArray;
 231                 else if("Vector Float".equals(type)) return L0.FloatArray;
 232                 else if("Vector Byte".equals(type)) return L0.ByteArray;
 233                 else if("Vector Boolean".equals(type)) return L0.BooleanArray;
 234                 else if("Vector Variant".equals(type)) return L0.VariantArray;
 235                 else if("Datatype".equals(type)) return L0.DataType;
 236                 else if("Variant".equals(type)) return L0.Variant;
 237                 else return null;
 238         }
 239
 240         public static Resource getPossibleLiteralType(ReadGraph graph, Variable variable) throws DatabaseException {
 241                 Resource predicate = variable.getPossiblePredicateResource(graph);
 242                 if(predicate == null) return null;
 243                 return getPossibleLiteralType(graph, predicate);
 244         }
 245
 246         public static Resource getLiteralType(ReadGraph graph, Variable variable) throws DatabaseException {
 247                 Resource result = getPossibleLiteralType(graph, variable);
 248                 if(result == null) throw new DatabaseException("Unidentified literal type for variable " + variable.getURI(graph));
 249                 return result;
 250         }
 251
 252         public static Resource getLiteralType(ReadGraph graph, Resource property) throws DatabaseException {
 253                 Resource result = getPossibleLiteralType(graph, property);
 254                 if(result == null) throw new DatabaseException("Unidentified literal type for property " + graph.getURI(property));
 255                 return result;
 256         }
 257
 258         public static Resource getPossibleLiteralType(ReadGraph graph, Resource property) throws DatabaseException {
 259
 260                 Layer0 L0 = Layer0.getInstance(graph);
 261                 Layer0X L0X = Layer0X.getInstance(graph);
 262
 263                 Resource defaultLiteralType = graph.getPossibleObject(property, L0.HasDefaultLiteralType);
 264                 if(defaultLiteralType != null) return defaultLiteralType;
 265
 266                 Resource range = graph.getPossibleObject(property, L0.HasRange);
 267                 if(range != null && !L0.Value.equals(range)) return range;
 268
 269                 Datatype requiredDataType = graph.getPossibleRelatedValue(property, L0X.RequiresDataType, datatype_binging);
 270                 if(requiredDataType != null) return getLiteralType(graph, requiredDataType);
 271
 272                 String requiredValueType = graph.getPossibleRelatedValue(property, L0.RequiresValueType, Bindings.STRING);
 273                 if(requiredValueType == null) return null;
 274
 275                 return getPossibleLiteralType(graph, requiredValueType);
 276
 277         }
 278
 279         /**
 280          * @param type any data type definition
 281          * @return SCL type that matches the specified data type on a basic level.
 282          *         Data type metadata is/cannot be converted into SCL types.
 283          * @throws IllegalArgumentException
 284          *             if the input datatype can't be converted into an SCL type
 285          */
 286         public static String getSCLType(Datatype type) throws IllegalArgumentException {
 287                 return buildSCLType(type, null).toString();
 288         }
 289
 290         /**
 291          * Only used internally by {@link #buildSCLType(Datatype, StringBuilder)}
 292          * @param s
 293          * @param toBuilder
 294          * @return
 295          * @see #buildSCLType(Datatype, StringBuilder)
 296          */
 297         private static StringBuilder append(StringBuilder toBuilder, String s) {
 298                 return toBuilder != null ? toBuilder.append(s) : new StringBuilder(s);
 299         }
 300
 301         private static CharSequence append(CharSequence to, String s) {
 302                 if (to instanceof StringBuilder)
 303                         return ((StringBuilder) to).append(s);
 304                 return new StringBuilder(to.length() + s.length()).append(to).append(s);
 305         }
 306
 307         private static CharSequence stringOrBuilder(StringBuilder toBuilder, String s) {
 308                 return toBuilder != null ? toBuilder.append(s) : s;
 309         }
 310
 311         /**
 312          * @param type any data type definition
 313          * @return SCL type that matches the specified data type on a basic level.
 314          *         Data type metadata is/cannot be converted into SCL types.
 315          * @throws IllegalArgumentException
 316          *             if the input datatype can't be converted into an SCL type
 317          */
 318         private static CharSequence buildSCLType(Datatype type, StringBuilder result) throws IllegalArgumentException {
 319                 if(type instanceof DoubleType) return stringOrBuilder(result, "Double");
 320                 else if(type instanceof StringType) return stringOrBuilder(result, "String");
 321                 else if(type instanceof IntegerType) return stringOrBuilder(result, "Integer");
 322                 else if(type instanceof FloatType) return stringOrBuilder(result, "Float");
 323                 else if(type instanceof BooleanType) return stringOrBuilder(result, "Boolean");
 324                 else if(type instanceof ByteType) return stringOrBuilder(result, "Byte");
 325                 else if(type instanceof LongType) return stringOrBuilder(result, "Long");
 326                 else if(type instanceof VariantType) return stringOrBuilder(result, "Variant");
 327                 else if(type instanceof ArrayType) {
 328                         ArrayType at = (ArrayType) type;
 329                         // Optimization to prevent allocations in the most basic array cases
 330                         if(at.componentType instanceof DoubleType) return stringOrBuilder(result, "Vector Double");
 331                         else if(at.componentType instanceof StringType) return stringOrBuilder(result, "Vector String");
 332                         else if(at.componentType instanceof IntegerType) return stringOrBuilder(result, "Vector Integer");
 333                         else if(at.componentType instanceof FloatType) return stringOrBuilder(result, "Vector Float");
 334                         else if(at.componentType instanceof BooleanType) return stringOrBuilder(result, "Vector Boolean");
 335                         else if(at.componentType instanceof ByteType) return stringOrBuilder(result, "Vector Byte");
 336                         else if(at.componentType instanceof LongType) return stringOrBuilder(result, "Vector Long");
 337                         else if(at.componentType instanceof VariantType) return stringOrBuilder(result, "Vector Variant");
 338                         else return buildSCLType(at.componentType, append(result, "Vector "));
 339                 } else if(type instanceof OptionalType) {
 340                         OptionalType ot = (OptionalType) type;
 341                         return append(buildSCLType(ot.componentType, append(result, "Maybe (")), ")");
 342                 } else if (type instanceof RecordType) {
 343                         throw new IllegalArgumentException("Unable to convert datatype into SCL type: " + type);
 344                 } else if (type instanceof MapType) {
 345                         throw new IllegalArgumentException("Unable to convert datatype into SCL type: " + type);
 346                 } else if (type instanceof UnionType) {
 347                         throw new IllegalArgumentException("Unable to convert datatype into SCL type: " + type);
 348                 }
 349                 throw new IllegalArgumentException("Unable to convert datatype into SCL type: " + type);
 350         }
 351
 352
 353         public static Type getSCLType(ReadGraph graph, RuntimeEnvironment runtimeEnvironment, String typeText) throws DatabaseException {
 354         try {
 355                         return Environments.getType(runtimeEnvironment.getEnvironment(), typeText);
 356                 } catch (SCLExpressionCompilationException e) {
 357                         throw new DatabaseException(e);
 358                 }
 359         }
 360
 361         public static Type getSCLType(ReadGraph graph, Variable property) throws DatabaseException {
 362
 363                 RuntimeEnvironment runtimeEnvironment = graph.syncRequest(new RuntimeEnvironmentRequest(property.getIndexRoot(graph)));
 364                 return getSCLType(graph, runtimeEnvironment, getSCLTypeString(graph, property));
 365
 366         }
 367
 368
 369         public static String getSCLTypeString(ReadGraph graph, Variable context) throws DatabaseException {
 370                 return getSCLTypeString(graph, context.getPossiblePredicateResource(graph), context.getRepresents(graph));
 371         }
 372
 373
 374         public static String getSCLTypeString(ReadGraph graph, Resource predicate, Resource value) throws DatabaseException {
 375
 376                 if(predicate != null) {
 377                     String requiredValueTypes = graph.getPossibleRelatedValue(predicate, Layer0.getInstance(graph).RequiresValueType, Bindings.STRING);
 378                     if(requiredValueTypes != null)
 379                         return requiredValueTypes;
 380                 }
 381
 382                 Layer0 L0 = Layer0.getInstance(graph);
 383                 Layer0X L0X = Layer0X.getInstance(graph);
 384
 385                 Datatype literalDatatype = graph.getPossibleRelatedValue(value, L0.HasDataType, datatype_binging);
 386                 if(literalDatatype != null) return getSCLType(literalDatatype);
 387
 388                 String literalValueType = graph.getPossibleRelatedValue(value, L0.HasValueType, Bindings.STRING);
 389                 if(literalValueType != null) return literalValueType;
 390
 391                 if(predicate != null) {
 392
 393                         Datatype requiredDataType = graph.getPossibleRelatedValue(predicate, L0X.RequiresDataType, datatype_binging);
 394                         if(requiredDataType != null) return getSCLType(requiredDataType);
 395
 396                         throw new DatabaseException("Unidentified literal data type for property " + NameUtils.getURIOrSafeNameInternal(graph, predicate));
 397
 398                 }
 399
 400                 throw new DatabaseException("Unidentified literal data type");
 401
 402         }
 403
 404         public static Datatype getDatatype(ReadGraph graph, Variable variable) throws DatabaseException {
 405                 Datatype result = getPossibleDatatype(graph, variable);
 406                 if(result != null) return result;
 407                 throw new DatabaseException("Unidentified literal data type for property " + variable.getURI(graph));
 408         }
 409
 410         public static Datatype getPossibleDatatype(ReadGraph graph, Variable variable) throws DatabaseException {
 411
 412                 Layer0 L0 = Layer0.getInstance(graph);
 413                 Layer0X L0X = Layer0X.getInstance(graph);
 414
 415                 Resource property = variable.getPossiblePredicateResource(graph);
 416                 if(property != null) {
 417 //                      Datatype requiredDataType = graph.getPossibleRelatedValue(property, L0X.RequiresDataType, datatype_binging);
 418                         Datatype requiredDataType = graph.syncRequest(new PossibleRelatedValue<Datatype>(property, L0X.RequiresDataType, datatype_binging));
 419                         if(requiredDataType != null) return requiredDataType;
 420                 }
 421
 422                 Resource literal = variable.getPossibleRepresents(graph);
 423                 if(literal != null) {
 424                     Datatype literalDatatype = graph.getPossibleRelatedValue2(literal, L0.HasDataType, new StandardGraphPropertyVariable(graph, variable, null, literal, L0.HasDataType), datatype_binging);
 425                     if(literalDatatype != null) return literalDatatype;
 426                 }
 427
 428                 if(property != null) {
 429
 430                         String requiredValueType = graph.getPossibleRelatedValue(property, L0.RequiresValueType, Bindings.STRING);
 431                         if(requiredValueType != null) {
 432                                 Datatype datatype = getPossibleDatatypeForValueType(requiredValueType);
 433                                 if(datatype != null) return datatype;
 434                         }
 435
 436                         Resource subject = variable.getParent(graph).getPossibleRepresents(graph);
 437                         if(subject != null) {
 438                                 Set<Resource> asses = new HashSet<Resource>();
 439                                 for(Resource type : graph.getTypes(subject)) {
 440                                         asses.addAll(graph.getAssertedObjects(type, property));
 441                                 }
 442                                 if(asses.size() == 1) {
 443                                         Resource ass = asses.iterator().next();
 444                                         Datatype dt = graph.getPossibleRelatedValue(ass, L0.HasDataType, Bindings.getBindingUnchecked(Datatype.class));
 445                                         if(dt != null) return dt;
 446                                 }
 447                         }
 448
 449                 }
 450
 451                 return null;
 452
 453         }
 454
 455         private static Datatype getPossibleDatatypeForValueType(String requiredValueType) throws DatabaseException {
 456
 457                 String[] split = requiredValueType.split(" ");
 458                 String arrayType = null;
 459                 if(split.length == 2 && "Array".equals(split[0])) {
 460                         arrayType = split[1];
 461                 } else if(requiredValueType.startsWith("[") && requiredValueType.endsWith("]")) {
 462                         arrayType = requiredValueType.substring(1, requiredValueType.length()-1);
 463                 }
 464
 465                 if(arrayType != null) {
 466                         Datatype arrayDataType = getArrayDataTypeForType(arrayType);
 467                         if(arrayDataType != null)
 468                                 return arrayDataType;
 469                 }
 470
 471                 Datatype dt = Datatypes.getDatatype(requiredValueType);
 472                 if(dt != null) return dt;
 473
 474                 try {
 475                         return Datatypes.translate(requiredValueType);
 476                 } catch (DataTypeSyntaxError e) {
 477                         return null;
 478                 }
 479
 480
 481         }
 482
 483         private static Datatype getArrayDataTypeForType(String type) {
 484                 if("Double".equals(type)) return Datatypes.DOUBLE_ARRAY;
 485                 else if("String".equals(type)) return Datatypes.STRING_ARRAY;
 486                 else if("Integer".equals(type)) return Datatypes.INTEGER_ARRAY;
 487                 else if("Long".equals(type)) return Datatypes.LONG_ARRAY;
 488                 else if("Float".equals(type)) return Datatypes.FLOAT_ARRAY;
 489                 else if("Byte".equals(type)) return Datatypes.BYTE_ARRAY;
 490                 else if("Boolean".equals(type)) return Datatypes.BOOLEAN_ARRAY;
 491                 else if("Variant".equals(type)) return Datatypes.VARIANT_ARRAY;
 492                 return null;
 493         }
 494
 495         public static Binding getDefaultBinding(ReadGraph graph, Variable variable) throws DatabaseException {
 496
 497                 Resource property = variable.getPossiblePredicateResource(graph);
 498                 if(property != null) {
 499                         PropertyInfo info = graph.syncRequest(new PropertyInfoRequest(property), TransientCacheAsyncListener.<PropertyInfo>instance());
 500                         if(info.defaultBinding != null) return info.defaultBinding;
 501                 }
 502
 503                 Datatype type = getDatatype(graph, variable);
 504                 if (type == null)
 505                         throw new DatabaseException("No datatype available for variable " + variable.getURI(graph));
 506                 return Bindings.getBinding(type);
 507
 508         }
 509
 510         public static Binding getPossibleDefaultBinding(ReadGraph graph, Variable variable) throws DatabaseException {
 511
 512                 Resource property = variable.getPossiblePredicateResource(graph);
 513                 if(property != null) {
 514                         PropertyInfo info = graph.syncRequest(new PropertyInfoRequest(property), TransientCacheAsyncListener.<PropertyInfo>instance());
 515                         if(info.defaultBinding != null) return info.defaultBinding;
 516                 }
 517
 518                 Datatype type = getPossibleDatatype(graph, variable);
 519                 if (type == null) return null;
 520
 521                 return Bindings.getBinding(type);
 522
 523         }
 524
 525         public static String getPossibleUnit(Datatype dt) {
 526                 if (dt == null)
 527                         return null;
 528                 else if (dt instanceof NumberType) {
 529                         return ((NumberType) dt).getUnit();
 530                 } else if (dt instanceof ArrayType) {
 531                         ArrayType at = (ArrayType) dt;
 532                         Datatype cdt = at.componentType();
 533                         if (cdt instanceof NumberType) {
 534                                 return ((NumberType) cdt).getUnit();
 535                         }
 536                 }
 537                 return null;
 538
 539         }
 540
 541         public static String getUnit(ReadGraph graph, Variable variable) throws DatabaseException {
 542
 543                 Layer0 L0 = Layer0.getInstance(graph);
 544                 Layer0X L0X = Layer0X.getInstance(graph);
 545
 546                 Resource literal = variable.getPossibleRepresents(graph);
 547                 if(literal == null)
 548                     return "";
 549
 550                 Datatype literalDatatype = graph.getPossibleRelatedValue2(literal, L0.HasDataType, new StandardGraphPropertyVariable(graph, variable, null, literal, L0.HasDataType), datatype_binging);
 551                 if(literalDatatype != null) {
 552                         String unit = getPossibleUnit(literalDatatype);
 553                         if(unit != null) return unit;
 554                 }
 555
 556                 Resource property = variable.getPossiblePredicateResource(graph);
 557                 if(property != null) {
 558
 559                         Datatype requiredDataType = graph.getPossibleRelatedValue(property, L0X.RequiresDataType, datatype_binging);
 560                         if(requiredDataType != null) {
 561                                 String unit = getPossibleUnit(requiredDataType);
 562                                 if(unit != null) return unit;
 563                         }
 564
 565                 }
 566
 567                 return "";
 568
 569         }
 570
 571         public static void claimAdaptedValue(WriteGraph graph, Resource objectResource, Object value, Binding binding, Datatype datatype) throws DatabaseException {
 572
 573                 try {
 574
 575                         Datatype source = binding.type();
 576                         if(source.equals(datatype)) {
 577                                 graph.claimValue(objectResource, value, binding);
 578                         } else {
 579                                 Binding target = Bindings.getBinding(datatype);
 580                                 Adapter adapter = Bindings.getAdapter(binding, target);
 581                                 graph.claimValue(objectResource, adapter.adapt(value), target);
 582                         }
 583
 584                 } catch (AdapterConstructionException e) {
 585                         throw new DatabaseException(e);
 586                 } catch (AdaptException e) {
 587                         throw new DatabaseException(e);
 588                 }
 589
 590         }
 591
 592         public static String toString(Object value, Binding binding) throws DatabaseException {
 593                 try {
 594                         if(value instanceof String) return (String)value;
 595                         StringBuilder sb = new StringBuilder();
 596                         DataValueRepository rep = new DataValueRepository();
 597                         binding.printValue(value, sb, rep, false);
 598                         return sb.toString();
 599                 } catch (BindingException e) {
 600                         throw new DatabaseException(e);
 601                 } catch (IOException e) {
 602                         throw new DatabaseException(e);
 603                 }
 604         }
 605
 606         public static Object parseValue(String text, Binding binding) throws DatabaseException {
 607                 try {
 608                         if(binding.isInstance(text)) return text;
 609                         DataValueRepository rep = new DataValueRepository();
 610                         return binding.parseValue(text, rep);
 611                 } catch (BindingException e) {
 612                         throw new DatabaseException(e);
 613                 } catch (DataTypeSyntaxError e) {
 614                         throw new DatabaseException(e);
 615                 }
 616         }
 617
 618         @SuppressWarnings("unchecked")
 619         public static <T> T getValueAdaptedToBinding(ReadGraph graph, Resource literal, Binding targetBinding) throws DatabaseException {
 620                 Datatype sourceDatatype = graph.getDataType(literal);
 621                 Datatype targetDatatype = targetBinding.type();
 622                 if (sourceDatatype.equals(targetDatatype))
 623                         return graph.getValue(literal, targetBinding);
 624
 625                 Binding sourceBinding = Bindings.getBinding(sourceDatatype);
 626                 try {
 627                         Adapter adapter = Bindings.adapterFactory.getAdapter(Bindings.getBinding(sourceDatatype), targetBinding, true, false);
 628                         Object value = graph.getValue(literal, sourceBinding);
 629                         return (T) adapter.adaptUnchecked(value);
 630                 } catch (AdapterConstructionException e) {
 631                         throw new DatabaseException(e);
 632                 }
 633         }
 634
 635         public static Statement getStatementInLocal(Resource subject, Statement statement) {
 636                 if(statement.isAsserted(subject)) return new StandardStatement(subject, statement.getPredicate(), statement.getObject());
 637                 else return statement;
 638         }
 639
 640         public static Resource browsePossible(ReadGraph graph, Resource root, String suffix) throws DatabaseException {
 641                 return graph.getPossibleResource(graph.getURI(root) + suffix);
 642         }
 643
 644         public static Resource getPossibleChild(ReadGraph graph, Resource resource, String name) throws DatabaseException {
 645                 return graph.sync(new PossibleChild(resource, name));
 646         }
 647
 648         public static Resource getPossibleChild(ReadGraph graph, Resource resource, Resource type, String name) throws DatabaseException {
 649                 Resource child = graph.sync(new PossibleChild(resource, name));
 650                 if(child == null) return null;
 651                 if(!graph.isInstanceOf(child, type)) return null;
 652                 return child;
 653         }
 654
 655         public static RelationContext relationContext(ReadGraph graph, Resource subject, Resource predicate) throws DatabaseException {
 656                 Statement stm = graph.getSingleStatement(subject, predicate);
 657                 return new RelationContextImpl(subject, stm);
 658         }
 659
 660         public static RelationContext relationContext(Statement stm) throws DatabaseException {
 661                 return new RelationContextImpl(stm.getSubject(), stm);
 662         }
 663
 664         public static <T> T valueInRelationContext(ReadGraph graph, Resource subject, Statement stm) throws DatabaseException {
 665                 return graph.getValue2(subject, Layer0Utils.relationContext(stm));
 666         }
 667
 668         public static <T> T valueInRelationContext(ReadGraph graph, Resource subject, Statement stm, Binding binding) throws DatabaseException {
 669                 return graph.getValue2(subject, Layer0Utils.relationContext(stm), binding);
 670         }
 671
 672         public static <T> T relatedValueInRelationContext(ReadGraph graph, Resource subject, Resource relation) throws DatabaseException {
 673                 Statement stm = getStatementInLocal(subject, graph.getSingleStatement(subject, relation));
 674                 return valueInRelationContext(graph, stm.getObject(), stm);
 675         }
 676
 677         public static <T> T relatedValueInRelationContext(ReadGraph graph, Resource subject, Resource relation, Binding binding) throws DatabaseException {
 678                 Statement stm = getStatementInLocal(subject, graph.getSingleStatement(subject, relation));
 679                 return valueInRelationContext(graph, stm.getObject(), stm, binding);
 680         }
 681
 682         public static Statement possibleObtainedStatementInternal(ReadGraph graph, Resource subject, Resource relation) throws DatabaseException {
 683
 684                 Layer0X L0X = Layer0X.getInstance(graph);
 685
 686                 for(Resource ob : graph.getObjects(subject, L0X.DefinesObtainedStatement)) {
 687                         Resource pred = graph.getSingleObject(ob, L0X.ObtainedStatement_predicate);
 688                         if(graph.isSubrelationOf(pred, relation)) {
 689                                 Resource object = graph.getSingleObject(ob, L0X.ObtainedStatement_object);
 690                                 return new StandardStatement(subject, pred, object);
 691                         }
 692                 }
 693
 694                 ArrayList<OrderedResource> order = new ArrayList<OrderedResource>();
 695                 for(Statement stm : graph.getStatements(subject, L0X.ObtainsProperty)) {
 696                         Integer position = graph.getRelatedValue(stm.getPredicate(), L0X.NaturalNumberOrderRelation, Bindings.INTEGER);
 697                         order.add(new OrderedResource(position, stm.getObject()));
 698                 }
 699
 700                 for(OrderedResource or : order) {
 701                         Statement stm = possibleObtainedStatementInternal(graph, or.r, relation);
 702                         if(stm != null) return stm;
 703                 }
 704
 705                 return null;
 706
 707         }
 708
 709         public static <T> T possibleObtainedValue(ReadGraph graph, RelationContext ctx, Binding binding) throws DatabaseException {
 710
 711                 Statement stm = ctx.getStatement();
 712                 Statement obj = Layer0Utils.possibleObtainedStatementInternal(graph, stm.getSubject(), stm.getPredicate());
 713
 714                 if(obj != null) {
 715                         return Layer0Utils.valueInRelationContext(graph, obj.getObject(), obj, binding);
 716                 } else {
 717                         return null;
 718                 }
 719
 720         }
 721
 722         public static void addObtainedStatement(WriteGraph graph, Resource subject, Resource predicate, Resource object) throws DatabaseException {
 723                 Layer0 L0 = Layer0.getInstance(graph);
 724                 Layer0X L0X = Layer0X.getInstance(graph);
 725                 Resource ob = graph.newResource();
 726                 graph.claim(ob, L0.InstanceOf, null, L0X.ObtainedStatement);
 727                 graph.claim(ob, L0X.ObtainedStatement_predicate, null, predicate);
 728                 graph.claim(ob, L0X.ObtainedStatement_object, null, object);
 729                 graph.claim(subject, L0X.DefinesObtainedStatement, null, ob);
 730         }
 731
 732         public static void addObtainedValue(WriteGraph graph, Resource subject, Resource predicate, Resource type, Object value, Binding binding) throws DatabaseException {
 733                 Layer0 L0 = Layer0.getInstance(graph);
 734                 Resource object = graph.newResource();
 735                 graph.claim(object, L0.InstanceOf, type);
 736                 graph.claimValue(object, value, binding);
 737                 Layer0Utils.addObtainedStatement(graph, subject, predicate, object);
 738         }
 739
 740         //-------------------------------------------------------------------------
 741         // Indexing state query utilities idle handling utilities
 742         //-------------------------------------------------------------------------
 743
 744         /**
 745          * This method waits until the indexing engine becomes idle.
 746          * @since 1.8
 747          */
 748         public static void waitIndexPending() {
 749                 Indexing.waitIndexPending();
 750         }
 751
 752         /**
 753          * @param graph an active database write handle to prove one is in a write
 754          *        transaction and wants to disable dependencies indexing for this
 755          *        transaction only.
 756          * @return previous value
 757          * @since 1.8
 758          */
 759         public static boolean setDependenciesIndexingDisabled(WriteOnlyGraph graph, boolean disabled) {
 760                 return Indexing.setDependenciesIndexingDisabled(graph, disabled);
 761         }
 762
 763         public static String undo() throws DatabaseException {
 764
 765             Session session = SimanticsInternal.getSession();
 766
 767         UndoRedoSupport support = session.getService(UndoRedoSupport.class);
 768
 769         List<Operation> ops = support.undoAndReturnOperations(session, 1);
 770         if(ops.isEmpty())
 771             return "Undo history is empty.";
 772
 773         Operation mainOperation = ops.get(0);
 774
 775         long csId = mainOperation.getCSId();
 776
 777         ManagementSupport management = session.getService(ManagementSupport.class);
 778         Collection<ChangeSetIdentifier> ids = management.getChangeSetIdentifiers(csId, csId);
 779
 780         return "Undo reverted " + ids.size() + " change sets.";
 781
 782         }
 783
 784         public static String undoOperations(int amountOfOperations) throws DatabaseException {
 785
 786             Session session = SimanticsInternal.getSession();
 787
 788         UndoRedoSupport support = session.getService(UndoRedoSupport.class);
 789
 790         List<Operation> ops = support.undoAndReturnOperations(session, amountOfOperations);
 791         if(ops.isEmpty())
 792             return "Undo history is empty.";
 793
 794         Operation mainOperation = ops.get(0);
 795
 796         long csId = mainOperation.getCSId();
 797
 798         ManagementSupport management = session.getService(ManagementSupport.class);
 799         Collection<ChangeSetIdentifier> ids = management.getChangeSetIdentifiers(csId, csId);
 800
 801         return "Undo reverted " + ids.size() + " change sets.";
 802
 803         }
 804
 805         public static String redo() throws DatabaseException {
 806
 807             Session session = SimanticsInternal.getSession();
 808
 809         UndoRedoSupport support = session.getService(UndoRedoSupport.class);
 810
 811         List<Operation> ops = support.redo(session, 1);
 812         if(ops.isEmpty())
 813             return "Redo history is empty.";
 814
 815         Operation mainOperation = ops.get(0);
 816
 817         long csId = mainOperation.getCSId();
 818
 819         ManagementSupport management = session.getService(ManagementSupport.class);
 820         Collection<ChangeSetIdentifier> ids = management.getChangeSetIdentifiers(csId, csId);
 821
 822         return "Redo redid " + ids.size() + " change sets.";
 823
 824         }
 825
 826         public static String getComment(Session session, ChangeSetIdentifier id) {
 827             byte[] data = id.getMetadata().get(CommentMetadata.class.getName());
 828             if(data == null)
 829                 return "Undescribed operation.";
 830             String comment = CommentMetadata.deserialise(session, data).toString().trim();
 831             if(comment.isEmpty())
 832                 return "Undescribed operation.";
 833             return comment;
 834         }
 835
 836     /**
 837      * This method adds CommentMetadata for write transaction. CommentMetadata is used e.g. in Undo view.
 838      * @param graph
 839      *    graph handle
 840      * @param string
 841      *    comment
 842      * @throws ServiceException
 843      */
 844     public static void addCommentMetadata(WriteOnlyGraph graph, String string) throws ServiceException {
 845         // Add a comment to metadata.
 846         CommentMetadata cm = graph.getMetadata(CommentMetadata.class);
 847         graph.addMetadata(cm.add(ObjectUtils.toString(string)));
 848     }
 849
 850         //-------------------------------------------------------------------------
 851
 852         /**
 853          * Copy the specified source resource into the specified container using the
 854          * specified write transaction handle.
 855          *
 856          * @param graph write transaction handle
 857          * @param targetContainer target container resource of the created copy. The
 858          *        exact logic of how the copy will be contained by the target
 859          *        container is up to the PasteHandler to decide
 860          * @param source the source resource to copy
 861          * @throws DatabaseException
 862          * @since 1.8
 863          */
 864         public static Collection<Resource> copyTo(WriteGraph graph, Resource targetContainer, Resource source) throws DatabaseException {
 865                 return copyTo(graph, targetContainer, source, null, null, null);
 866         }
 867
 868         public static Collection<Resource> copyTo(WriteGraph graph, Resource targetContainer, Resource source, PasteEventHandler handler) throws DatabaseException {
 869                 return copyTo(graph, targetContainer, source, handler, null, null);
 870         }
 871
 872         public static Collection<Resource> copyTo(WriteGraph graph, Resource targetContainer, Resource source, PasteEventHandler handler, CopyHandler copyHandler, PasteHandler pasteHandler) throws DatabaseException {
 873                 if(copyHandler == null) copyHandler = graph.adapt(source, CopyHandler.class);
 874                 return copyTo(graph, targetContainer, handler, copyHandler, pasteHandler);
 875         }
 876
 877         public static Collection<Resource> copyTo(WriteGraph graph, Resource targetContainer, PasteEventHandler handler, CopyHandler copyHandler, PasteHandler pasteHandler) throws DatabaseException {
 878                 SimanticsClipboardImpl clipboard = new SimanticsClipboardImpl();
 879                 copyHandler.copyToClipboard(graph, clipboard);
 880                 if(targetContainer != null) {
 881                         if(pasteHandler == null) pasteHandler = graph.adapt(targetContainer, PasteHandler.class);
 882                         return pasteHandler.pasteFromClipboard(graph, clipboard, handler);
 883                 } else {
 884                         DefaultPasteHandler ph = new DefaultPasteHandler(null);
 885                         return ph.pasteFromClipboard(graph, clipboard, handler);
 886                 }
 887         }
 888
 889         public static CopyHandler2 getPossibleCopyHandler(ReadGraph graph, Collection<Resource> rs) throws DatabaseException {
 890         CopyHandler2 ch = null;
 891         for(Resource r : rs) {
 892             if(ch == null) {
 893                 CopyHandler ch2_ = graph.adapt(r, CopyHandler.class);
 894                 if(ch2_ instanceof CopyHandler2) {
 895                     ch = (CopyHandler2)ch2_;
 896                 }
 897             } else {
 898                 CopyHandler ch2_ = graph.adapt(r, CopyHandler.class);
 899                 if(ch2_ instanceof CopyHandler2) {
 900                     CopyHandler2 ch2 = (CopyHandler2)ch2_;
 901                     ch = ch.combine(ch2);
 902                 }
 903             }
 904         }
 905         return ch;
 906         }
 907
 908         public static ClusterCollectorPolicy setClusterCollectorPolicy(ClusterCollectorPolicy policy) {
 909                 Session session = SimanticsInternal.getSession();
 910                 ClusterControl cc = session.getService(ClusterControl.class);
 911                 return cc.setPolicy(policy);
 912         }
 913
 914         private static String decodeType(ReadGraph graph, Variable variable) throws DatabaseException {
 915                 Datatype dt = getDatatype(graph, variable);
 916                 return dt.toSingleLineString();
 917         }
 918
 919         private static boolean isAsserted(ReadGraph graph, Resource subject, Resource predicate) throws DatabaseException {
 920                 Statement stm = graph.getPossibleStatement(subject, predicate);
 921                 return stm != null && stm.isAsserted(subject);
 922         }
 923
 924         public static void setExpression(WriteGraph graph, Variable context, String text, Resource expressionValueType) throws DatabaseException {
 925
 926                 Resource value = context.getRepresents(graph);
 927                 Resource predicateResource = context.getPredicateResource(graph);
 928                 Variable parent = context.getParent(graph);
 929                 Resource parentResource = parent.getRepresents(graph);
 930                 setExpression(graph, parentResource, predicateResource, value, text, expressionValueType);
 931
 932         }
 933
 934         public static void setExpression(WriteGraph graph, Resource parentResource, Resource predicateResource, Resource value, String text, Resource expressionValueType) throws DatabaseException {
 935
 936                 Layer0 L0 = Layer0.getInstance(graph);
 937                 boolean hasExpression = graph.isInstanceOf(value, expressionValueType);
 938                 String t = getSCLTypeString(graph, predicateResource, value);
 939                 String expression = text.substring(1).trim();
 940                 if(isAsserted(graph, parentResource, predicateResource)) {
 941                         Resource newValue = graph.newResource();
 942                         graph.claim(newValue, L0.InstanceOf, expressionValueType);
 943                         graph.claimLiteral(newValue, L0.HasValueType, t, Bindings.STRING);
 944                         graph.claimLiteral(newValue, L0.SCLValue_expression, expression, Bindings.STRING);
 945                         graph.claim(parentResource, predicateResource, newValue);
 946                 } else {
 947                         if(hasExpression) {
 948                                 graph.claimLiteral(value, L0.SCLValue_expression, expression, Bindings.STRING);
 949                         } else {
 950                                 Resource newValue = graph.newResource();
 951                                 graph.claim(newValue, L0.InstanceOf, expressionValueType);
 952                                 graph.claimLiteral(newValue, L0.HasValueType, t, Bindings.STRING);
 953                                 graph.claimLiteral(newValue, L0.SCLValue_expression, expression, Bindings.STRING);
 954                                 graph.deny(parentResource, predicateResource);
 955                                 graph.claim(parentResource, predicateResource, newValue);
 956                         }
 957                 }
 958
 959         }
 960
 961         public static void clearExpression(WriteGraph graph, Variable property, Resource expressionValueType) throws DatabaseException {
 962
 963                 Resource object = property.getPossibleRepresents(graph);
 964                 if(object != null) {
 965                         boolean hasExpression = graph.isInstanceOf(object, expressionValueType);
 966                         if(hasExpression) {
 967                                 // There was an expression and now we go back to a value
 968                                 Resource subject = property.getParent(graph).getPossibleRepresents(graph);
 969                                 if(subject != null) {
 970                                         Resource predicate = property.getPossiblePredicateResource(graph);
 971                                         if(predicate != null) {
 972                                                 graph.deny(subject, predicate, object);
 973                                                 RemoverUtil.remove(graph, object);
 974                                         }
 975                                 }
 976                         }
 977                 }
 978
 979         }
 980
 981         public static boolean setOrClearExpression(WriteGraph graph, Variable property, String text, Resource expressionValueType) throws DatabaseException {
 982
 983                 if(text.startsWith("=")) {
 984                         setExpression(graph, property, text, expressionValueType);
 985                         return true;
 986                 }
 987
 988                 clearExpression(graph, property, expressionValueType);
 989
 990                 return false;
 991
 992         }
 993
 994         public static void setValueAsString(WriteGraph graph, Variable property, String text, Resource expressionValueType) throws DatabaseException {
 995
 996                 try {
 997
 998                         if (setOrClearExpression(graph, property, text, expressionValueType))
 999                                 return;
1000
1001                         Object value = text;
1002                         Datatype type = property.getPossibleDatatype(graph);
1003                         if (type != null) {
1004
1005                                 Binding binding = Bindings.getBinding(type);
1006
1007                                 if (binding instanceof StringBinding) {
1008
1009                                         if (binding instanceof MutableStringBinding)
1010                                                 value = new MutableString(text);
1011                                         else
1012                                                 value = text;
1013
1014                                 } else {
1015
1016                                         if (binding instanceof NumberBinding) {
1017                                                 text = text.replace(",", ".");
1018                                         }
1019
1020                                         value = binding.parseValue(text, new DataValueRepository());
1021
1022                                 }
1023
1024                                 property.setValue(graph, value, binding);
1025
1026                         } else {
1027
1028                                 property.setValue(graph, value);
1029
1030                         }
1031
1032                         // Add a comment to metadata.
1033                         CommentMetadata cm = graph.getMetadata(CommentMetadata.class);
1034                         graph.addMetadata(cm.add("Set value " + ObjectUtils.toString(value)));
1035
1036                 } catch (DataTypeSyntaxError e) {
1037                         throw new DatabaseException(e);
1038                 } catch (BindingException e) {
1039                         throw new DatabaseException(e);
1040                 }
1041
1042         }
1043
1044
1045     public static String queryDebugSupport(String query) {
1046         Session session = SimanticsInternal.getSession();
1047         DebugSupport ds = session.getService(DebugSupport.class);
1048         return ds.query(session, "exec " + query);
1049     }
1050
1051     public static String queryListSupport (String query) {
1052         Session session = SimanticsInternal.getSession();
1053         DebugSupport ds = session.getService(DebugSupport.class);
1054         return ds.query(session, "list " + query);
1055     }
1056
1057     final public static Function1<Resource,Resource> resourceCluster = new FunctionImpl1<Resource, Resource>() {
1058                 @Override
1059                 public Resource apply(Resource p0) {
1060                         return p0;
1061                 }
1062         };
1063
1064         public static void sort(ReadGraph graph, List<Resource> collection) {
1065         CollectionSupport cos = graph.getService(CollectionSupport.class);
1066         cos.sort(collection);
1067         }
1068
1069         public static List<Resource> sortByCluster(ReadGraph graph, Collection<Resource> collection) {
1070         CollectionSupport cos = graph.getService(CollectionSupport.class);
1071         return cos.asSortedList(collection);
1072         }
1073
1074         public static List<Object> sortByCluster(final ReadGraph graph, List<Object> list, final Function1<Object,Resource> fn) {
1075         final ClusteringSupport cs = graph.getService(ClusteringSupport.class);
1076         ArrayList<Object> result = new ArrayList<Object>(list);
1077         Collections.sort(result, new Comparator<Object>() {
1078
1079                         @Override
1080                         public int compare(Object o1, Object o2) {
1081                                 Resource r1 = fn.apply(o1);
1082                                 Resource r2 = fn.apply(o2);
1083                                 long l1 = cs.getCluster(r1);
1084                                 long l2 = cs.getCluster(r2);
1085                                 if(l1 < l2) return -1;
1086                                 else if (l1 > l2) return 1;
1087                                 else return 0;
1088                         }
1089
1090         });
1091         return result;
1092     }
1093
1094     public static <T> List<T> sortByClusterT(final ReadGraph graph, Collection<T> list, final Function1<T,Resource> fn) {
1095         final ClusteringSupport cs = graph.getService(ClusteringSupport.class);
1096         ArrayList<T> result = new ArrayList<T>(list);
1097         Collections.sort(result, new Comparator<Object>() {
1098
1099             @Override
1100             public int compare(Object o1, Object o2) {
1101                 Resource r1 = fn.apply((T)o1);
1102                 Resource r2 = fn.apply((T)o2);
1103                 long l1 = cs.getCluster(r1);
1104                 long l2 = cs.getCluster(r2);
1105                 if(l1 < l2) return -1;
1106                 else if (l1 > l2) return 1;
1107                 else return 0;
1108             }
1109
1110         });
1111         return result;
1112     }
1113
1114     public static void makeSynchronous(ReadGraph graph, boolean value) throws DatabaseException {
1115         graph.setSynchronous(value);
1116     }
1117
1118     public static Set<Resource> listIndexRoots(ReadGraph graph) throws DatabaseException {
1119
1120         Layer0 L0 = Layer0.getInstance(graph);
1121
1122                 Set<Resource> indexRoots = new TreeSet<Resource>();
1123                 indexRoots.addAll(Layer0Utils.listOntologies(graph));
1124                 indexRoots.addAll(graph.syncRequest(new ObjectsWithType(SimanticsInternal.getProject(), L0.ConsistsOf, L0.IndexRoot)));
1125                 return indexRoots;
1126
1127     }
1128
1129     public static List<Resource> listOntologies(ReadGraph graph) throws DatabaseException {
1130         return graph.syncRequest(new OntologiesFromLibrary(graph.getRootLibrary()));
1131     }
1132
1133     public static List<Resource> listGlobalOntologies(ReadGraph graph) throws DatabaseException {
1134         return graph.syncRequest(new GlobalOntologies(graph.getRootLibrary()));
1135     }
1136
1137     public static <T> T applySCL(String module, String function, ReadGraph graph, Object ... args) throws DatabaseException {
1138
1139                 try {
1140                         SCL_GRAPH.set(graph);
1141                         T t = (T)((Function)SCLOsgi.MODULE_REPOSITORY.getValue(module + "/" + function)).applyArray(args);
1142                         SCL_GRAPH.set(null);
1143                         return t;
1144                 } catch (Throwable t) {
1145                         throw new DatabaseException(t);
1146                 }
1147
1148     }
1149
1150     public static boolean isContainerPublished(ReadGraph graph, Variable variable) throws DatabaseException {
1151
1152         Resource indexRoot = graph.syncRequest(new PossibleVariableIndexRoot(variable));
1153         if(indexRoot == null) return false;
1154         if(variable.equals(indexRoot)) return false;
1155         return isPublished(graph, indexRoot);
1156
1157     }
1158
1159     public static boolean isContainerPublished(ReadGraph graph, Resource resource) throws DatabaseException {
1160
1161         Resource indexRoot = graph.syncRequest(new PossibleIndexRoot(resource));
1162         if(indexRoot == null) return false;
1163         if(resource.equals(indexRoot)) return false;
1164         return isPublished(graph, indexRoot);
1165
1166     }
1167
1168     public static boolean isPublished(ReadGraph graph, Resource resource) throws DatabaseException {
1169
1170         Layer0 L0 = Layer0.getInstance(graph);
1171         Boolean value = graph.getPossibleRelatedValue(resource, L0.Entity_published, Bindings.BOOLEAN);
1172         if(value != null && value) return true;
1173
1174         // This is safety - root should not be published it child is not
1175         Resource root = graph.syncRequest(new PossibleIndexRoot(resource));
1176         if(root != null) {
1177                 value = graph.getPossibleRelatedValue(root, L0.Entity_published, Bindings.BOOLEAN);
1178                 if(value != null && value) return true;
1179         }
1180
1181         return false;
1182
1183     }
1184
1185     private static TransferableGraph1 makeTG(ReadGraph graph, Resource r) throws DatabaseException {
1186
1187         SimanticsClipboardImpl cp = new SimanticsClipboardImpl();
1188         CopyHandler c1 = graph.adapt(r, CopyHandler.class);
1189         c1.copyToClipboard(graph, cp);
1190         Collection<Set<Representation>> reps = cp.getContents();
1191         if(reps.size() != 1) return null;
1192         return ClipboardUtils.accept(graph, reps.iterator().next(), SimanticsKeys.KEY_TRANSFERABLE_GRAPH);
1193
1194     }
1195
1196     private static TransferableGraphSource makeTGSource(ReadGraph graph, Resource r) throws DatabaseException {
1197
1198         SimanticsClipboardImpl cp = new SimanticsClipboardImpl();
1199         CopyHandler c1 = graph.adapt(r, CopyHandler.class);
1200         c1.copyToClipboard(graph, cp);
1201         Collection<Set<Representation>> reps = cp.getContents();
1202         if(reps.size() != 1) return null;
1203         return ClipboardUtils.accept(graph, reps.iterator().next(), SimanticsKeys.KEY_TRANSFERABLE_GRAPH_SOURCE);
1204
1205     }
1206
1207     /*
1208      * Modifies target to resemble source.
1209      */
1210     public static boolean merge(WriteGraph graph, Resource source, Resource target) throws DatabaseException {
1211
1212         TransferableGraphSource tgs1 = makeTGSource(graph, target);
1213         TransferableGraph1 tg1 = TransferableGraphs.create(graph, tgs1);
1214         TransferableGraph1 tg2 = makeTG(graph, source);
1215
1216         GraphRefactoringUtils.fixIncorrectRoot(tg1.identities);
1217         GraphRefactoringUtils.fixIncorrectRoot(tg2.identities);
1218
1219         ModelTransferableGraphSource mtgs = (ModelTransferableGraphSource)tgs1;
1220
1221                 Diff diff = new Diff(tg1, tg2);
1222                 TransferableGraphDelta1 delta = diff.diff();
1223
1224                 long[] oldResources = mtgs.getResourceArray(graph);
1225                 if(TransferableGraphs.hasChanges(graph, oldResources, delta)) {
1226                         TransferableGraphs.applyDelta(graph, mtgs.getResourceArray(graph), delta);
1227                         return true;
1228                 } else {
1229                         return false;
1230                 }
1231
1232     }
1233
1234     public static Resource inferLiteralTypeFromString(ReadGraph graph, String text) {
1235         return Layer0.getInstance(graph).String;
1236     }
1237
1238     public static void emptyTrashBin() throws ServiceException {
1239         emptyTrashBin(new NullProgressMonitor());
1240     }
1241
1242     public static void emptyTrashBin(IProgressMonitor monitor) throws ServiceException {
1243         emptyTrashBin(monitor, SimanticsInternal.getSession(), SimanticsInternal.getProject());
1244     }
1245
1246     public static void emptyTrashBin(final IProgressMonitor monitor, Session session, final Resource project) throws ServiceException {
1247         final SubMonitor mon = SubMonitor.convert(monitor, "Emptying Trash Bin...", 10000);
1248         try {
1249             session.syncRequest(new DelayedWriteRequest() {
1250                 @Override
1251                 public void perform(WriteGraph graph) throws DatabaseException {
1252                     Layer0Utils.setDependenciesIndexingDisabled(graph, true);
1253                     Layer0 L0 = Layer0.getInstance(graph);
1254                     Layer0X L0X = Layer0X.getInstance(graph);
1255                     Resource parent = graph.getSingleObject(project, L0.PartOf);
1256                     Resource trashBin = Layer0Utils.getPossibleChild(graph, parent, "TrashBin");
1257                     Collection<Resource> trashes = trashBin != null
1258                             ? graph.getObjects(trashBin, L0.ConsistsOf)
1259                             : Collections.<Resource>emptyList();
1260                     if (trashes.isEmpty())
1261                         throw new CancelTransactionException();
1262                     mon.setWorkRemaining((2 + trashes.size()) * 1000);
1263                     for(Resource trash : trashes) {
1264                         if (mon.isCanceled())
1265                             throw new CancelTransactionException();
1266                         mon.subTask(NameUtils.getSafeName(graph, trash));
1267                         TGRemover remo = new TGRemover(mon.newChild(1000, SubMonitor.SUPPRESS_ALL_LABELS), trash);
1268                         remo.remove(graph);
1269                         if(graph.isInstanceOf(trash, L0.IndexRoot)) {
1270                                 // TODO: this should be an utility
1271                                         GenericRelationIndex index = graph.adapt(L0X.DependenciesRelation, GenericRelationIndex.class);
1272                                         IndexedRelations ir = graph.getService(IndexedRelations.class);
1273                                         // Deletes index files
1274                                         ir.reset(null, graph, L0X.DependenciesRelation, trash);
1275                                         // Notifies DB listeners
1276                                         index.reset(graph, trash);
1277                         }
1278                     }
1279                     if (mon.isCanceled())
1280                         throw new CancelTransactionException();
1281                     mon.subTask("Committing Changes");
1282                     mon.newChild(1000);
1283                 }
1284             });
1285             if (mon.isCanceled())
1286                 return;
1287             mon.subTask("Purging Database");
1288             mon.newChild(1000);
1289             purgeDatabase(monitor, session);
1290         } catch (CancelTransactionException e) {
1291             // Ignore.
1292         } catch (DatabaseException e) {
1293             throw new ServiceException(e);
1294         }
1295     }
1296
1297     public static void purgeDatabase() throws ServiceException {
1298         purgeDatabase(new NullProgressMonitor());
1299     }
1300
1301     public static void purgeDatabase(final IProgressMonitor monitor) throws ServiceException {
1302         purgeDatabase(monitor, SimanticsInternal.getSession());
1303     }
1304
1305     public static void purgeDatabase(final IProgressMonitor monitor, Session session) throws ServiceException {
1306         try {
1307                 XSupport xs = session.getService(XSupport.class);
1308                 xs.purge();
1309         } catch (DatabaseException e) {
1310                 throw new ServiceException(e);
1311         }
1312     }
1313
1314     public static Resource getSingleDomainOf(ReadGraph graph, Resource type, Resource target) throws DatabaseException {
1315         Resource result = null;
1316         for(Resource candidate : getDomainOf(graph, type).values()) {
1317                 if(graph.isInstanceOf(candidate, target)) {
1318                         if(result != null) throw new DatabaseException("Multiple relations found for target " + graph.getURI(target) + " in type " + graph.getURI(type));
1319                         else result = candidate;
1320                 }
1321         }
1322         if(result == null) throw new DatabaseException("Multiple relations found for target " + graph.getURI(target) + " in type " + graph.getURI(type));
1323         return result;
1324     }
1325
1326     public static Map<String, Resource> getDomainOf(ReadGraph graph, Resource type) throws DatabaseException {
1327         CollectionSupport cs = graph.getService(CollectionSupport.class);
1328         Map<String, Resource> result = cs.createObjectResourceMap(String.class);
1329         Layer0 L0 = Layer0.getInstance(graph);
1330         for(Resource r : graph.getObjects(type, L0.DomainOf)) {
1331                 String name = graph.getPossibleRelatedValue(r, L0.HasName, Bindings.STRING);
1332                 if(name != null) result.put(name, r);
1333         }
1334         for(Resource t : graph.getSupertypes(type)) {
1335                 for(Resource r : graph.getObjects(t, L0.DomainOf)) {
1336                         String name = graph.getPossibleRelatedValue(r, L0.HasName, Bindings.STRING);
1337                         if(name != null) result.put(name, r);
1338                 }
1339         }
1340         return result;
1341     }
1342
1343     public static Resource getPossiblePredicateByName(ReadGraph graph, Resource instance, String predicateName) throws DatabaseException {
1344         for(Resource type : graph.getPrincipalTypes(instance)) {
1345                 Map<String, Resource> domainOf = getDomainOf(graph, type);
1346                 Resource predicate = domainOf.get(predicateName);
1347                 if(predicate != null) return predicate;
1348         }
1349         return null;
1350     }
1351
1352     public static Resource getPossiblePredicateByLabel(ReadGraph graph, Resource instance, String predicateName) throws DatabaseException {
1353         Layer0 L0 = Layer0.getInstance(graph);
1354         for(Resource type : graph.getPrincipalTypes(instance)) {
1355                 Map<String, Resource> domainOf = getDomainOf(graph, type);
1356                 for(Resource r : domainOf.values()) {
1357                         String label = graph.getPossibleRelatedValue(r, L0.HasLabel, Bindings.STRING);
1358                         if(predicateName.equals(label))
1359                                 return r;
1360                 }
1361         }
1362         return null;
1363     }
1364
1365     public static void claimLiteralDataboard(WriteGraph graph, Resource container, Resource property, String valueText) throws DatabaseException {
1366
1367         try {
1368                 PropertyInfo pi = graph.syncRequest(new PropertyInfoRequest(property));
1369                 if(pi.literalRange == null) throw new DatabaseException("No suitable literal type defined as range for property.");
1370                 if(pi.defaultBinding == null) throw new DatabaseException("No suitable default binding for property.");
1371                         Object value = pi.defaultBinding.parseValue(valueText, new DataValueRepository());
1372                         graph.claimLiteral(container, property, pi.literalRange, value, pi.defaultBinding);
1373                 } catch (DataTypeSyntaxError e) {
1374                         throw new DatabaseException(e);
1375                 } catch (BindingException e) {
1376                         throw new DatabaseException(e);
1377                 }
1378
1379     }
1380
1381 }