bundles/org.simantics.graph.db/src/org/simantics/graph/db/TransferableGraphs.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in 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.graph.db;
  13
  14 import java.io.DataInput;
  15 import java.io.DataOutput;
  16 import java.io.File;
  17 import java.io.IOException;
  18 import java.io.InputStream;
  19 import java.util.ArrayList;
  20 import java.util.Collection;
  21 import java.util.HashSet;
  22 import java.util.TreeMap;
  23 import java.util.UUID;
  24 import java.util.function.BiFunction;
  25
  26 import org.simantics.databoard.Accessors;
  27 import org.simantics.databoard.Bindings;
  28 import org.simantics.databoard.Datatypes;
  29 import org.simantics.databoard.accessor.error.AccessorConstructionException;
  30 import org.simantics.databoard.accessor.error.AccessorException;
  31 import org.simantics.databoard.accessor.file.FileVariantAccessor;
  32 import org.simantics.databoard.binding.Binding;
  33 import org.simantics.databoard.binding.error.BindingConstructionException;
  34 import org.simantics.databoard.binding.error.DatatypeConstructionException;
  35 import org.simantics.databoard.binding.mutable.Variant;
  36 import org.simantics.databoard.container.DataContainer;
  37 import org.simantics.databoard.container.DataContainers;
  38 import org.simantics.databoard.serialization.SerializationException;
  39 import org.simantics.databoard.serialization.Serializer;
  40 import org.simantics.databoard.type.Datatype;
  41 import org.simantics.databoard.util.binary.BinaryFile;
  42 import org.simantics.databoard.util.binary.RandomAccessBinary;
  43 import org.simantics.db.ReadGraph;
  44 import org.simantics.db.RequestProcessor;
  45 import org.simantics.db.Resource;
  46 import org.simantics.db.Session;
  47 import org.simantics.db.VirtualGraph;
  48 import org.simantics.db.WriteGraph;
  49 import org.simantics.db.WriteOnlyGraph;
  50 import org.simantics.db.common.CommentMetadata;
  51 import org.simantics.db.common.request.ReadRequest;
  52 import org.simantics.db.common.request.WriteOnlyRequest;
  53 import org.simantics.db.common.request.WriteRequest;
  54 import org.simantics.db.exception.CancelTransactionException;
  55 import org.simantics.db.exception.DatabaseException;
  56 import org.simantics.db.service.SerialisationSupport;
  57 import org.simantics.db.service.VirtualGraphSupport;
  58 import org.simantics.graph.db.TransferableGraphSource.TransferableGraphSourceValueProcedure;
  59 import org.simantics.graph.diff.TransferableGraphDelta1;
  60 import org.simantics.graph.representation.Extensions;
  61 import org.simantics.graph.representation.External;
  62 import org.simantics.graph.representation.Identity;
  63 import org.simantics.graph.representation.TransferableGraph1;
  64 import org.simantics.graph.representation.Value;
  65 import org.slf4j.Logger;
  66 import org.slf4j.LoggerFactory;
  67
  68 import gnu.trove.list.array.TIntArrayList;
  69 import gnu.trove.map.hash.TObjectIntHashMap;
  70
  71 public class TransferableGraphs {
  72     final static Logger LOGGER = LoggerFactory.getLogger(TransferableGraphs.class);
  73
  74         public static long[] importGraph(Session session, Object tg, IImportAdvisor advisor) throws DatabaseException, TransferableGraphException {
  75                 if (tg instanceof TransferableGraph1)
  76                 {
  77                         return importGraph1(session, (TransferableGraph1) tg, advisor);
  78                 }
  79                 throw new TransferableGraphException("Cannot import "+tg.getClass().getName());
  80         }
  81
  82         public static long[] importGraph(WriteGraph g, Object tg, IImportAdvisor advisor) throws DatabaseException, TransferableGraphException {
  83                 if (tg instanceof TransferableGraph1)
  84                 {
  85                         return importGraph1(g, (TransferableGraph1) tg, advisor);
  86                 }
  87                 throw new TransferableGraphException("Cannot import "+tg.getClass().getName());
  88         }
  89
  90         public static long[] importGraph(Session session, Object tg) throws DatabaseException, TransferableGraphException {
  91                 if (tg instanceof TransferableGraph1)
  92                 {
  93                         return importGraph1(session, (TransferableGraph1) tg);
  94                 }
  95                 throw new TransferableGraphException("Cannot import "+tg.getClass().getName());
  96         }
  97
  98         public static long[] importGraph(WriteGraph g, Object tg) throws DatabaseException, TransferableGraphException {
  99                 if (tg instanceof TransferableGraph1)
 100                 {
 101                         return importGraph1(g, (TransferableGraph1) tg);
 102                 }
 103                 throw new TransferableGraphException("Cannot import "+tg.getClass().getName());
 104         }
 105
 106         public static Collection<Resource> collectExternals(RequestProcessor processor, final TransferableGraph1 tg) throws DatabaseException, TransferableGraphException {
 107                 final TransferableGraphImportProcess process = new TransferableGraphImportProcess(tg, new ImportAdvisor());
 108                 processor.syncRequest(new ReadRequest() {
 109                         @Override
 110                         public void run(ReadGraph graph) throws DatabaseException {
 111                                 process.prepare(graph);
 112                         }
 113                 });
 114                 HashSet<Resource> result = new HashSet<Resource>();
 115                 for(Identity id : tg.identities) {
 116                         if(id.definition instanceof External) {
 117                                 result.add(process.resources[id.resource]);
 118                         }
 119                 }
 120                 return result;
 121         }
 122
 123         /**
 124          * Imports transferable graph version 1 to the database. Root advisor is used
 125          * to give identities to roots of the transferable graphs. It may be null,
 126          * in which case new resources are created for all roots but the root library.
 127          *
 128          * @param session
 129          * @param tg
 130      * @param advisor root advisor or <code>null</code>
 131          * @throws DatabaseException
 132          */
 133         public static long[] importGraph1(Session session, final TransferableGraph1 tg, final IImportAdvisor advisor_) throws DatabaseException, TransferableGraphException {
 134
 135                 final IImportAdvisor2 advisor = (advisor_ instanceof IImportAdvisor2) ? ((IImportAdvisor2)advisor_) : new WrapperAdvisor(advisor_);
 136
 137                 final TransferableGraphImportProcess process = new TransferableGraphImportProcess(tg,
 138                                 advisor == null ? new ImportAdvisor() : advisor);
 139                 session.syncRequest(new ReadRequest() {
 140                         @Override
 141                         public void run(ReadGraph graph) throws DatabaseException {
 142                                 process.prepare(graph);
 143                         }
 144                 });
 145                 session.syncRequest(new WriteOnlyRequest() {
 146                         @Override
 147                         public void perform(WriteOnlyGraph graph) throws DatabaseException {
 148                                 advisor.beforeWrite(graph, process);
 149                                 process.write(graph);
 150                                 advisor.afterWrite(graph, process);
 151                         }
 152                 });
 153                 return process.getResourceIds(
 154                                 session.getService(SerialisationSupport.class));
 155         }
 156
 157         public static void importGraph1(Session session, final TransferableGraph1 tg, IImportAdvisor advisor, final BiFunction<WriteOnlyGraph, TransferableGraphImportProcess, Boolean> callback) throws DatabaseException, TransferableGraphException {
 158                 final TransferableGraphImportProcess process = new TransferableGraphImportProcess(tg,
 159                                 advisor == null ? new ImportAdvisor() : advisor);
 160                 session.syncRequest(new ReadRequest() {
 161                         @Override
 162                         public void run(ReadGraph graph) throws DatabaseException {
 163                                 process.prepare(graph);
 164                         }
 165                 });
 166                 session.syncRequest(new WriteOnlyRequest() {
 167                         @Override
 168                         public void perform(WriteOnlyGraph graph) throws DatabaseException {
 169                                 process.write(graph);
 170                                 if(callback != null)
 171                                         callback.apply(graph, process);
 172                         }
 173                 });
 174         }
 175
 176     public static ImportResult importGraph1(Session session, final TransferableGraphSource tg, IImportAdvisor advisor) throws Exception {
 177         return importGraph1(session, tg, advisor, null);
 178     }
 179
 180     public static ImportResult importGraph1(Session session, final TransferableGraphSource tg, IImportAdvisor advisor, TGStatusMonitor monitor) throws DatabaseException {
 181         return importGraph1(session, null, tg, advisor, monitor);
 182     }
 183
 184     public static ImportResult importGraph1(Session session, VirtualGraph vg, final TransferableGraphSource tg, IImportAdvisor advisor_, TGStatusMonitor monitor) throws DatabaseException {
 185         return importGraph1(session, vg, tg, advisor_, monitor, null);
 186     }
 187
 188     public static ImportResult importGraph1(Session session, VirtualGraph vg, final TransferableGraphSource tg, IImportAdvisor advisor_, TGStatusMonitor monitor, Boolean failOnMissing) throws DatabaseException {
 189
 190         final IImportAdvisor2 advisor = (advisor_ instanceof IImportAdvisor2) ? ((IImportAdvisor2)advisor_) : new WrapperAdvisor(advisor_);
 191
 192                 final StreamingTransferableGraphImportProcess process = failOnMissing == null ? new StreamingTransferableGraphImportProcess(session, vg, tg, advisor, monitor)
 193                                                                                                                                                                           : new StreamingTransferableGraphImportProcess(session, vg, tg, advisor, monitor, failOnMissing);
 194                 session.syncRequest(new ReadRequest() {
 195                         @Override
 196                         public void run(ReadGraph graph) throws DatabaseException {
 197                                 try {
 198                                         process.prepare(graph);
 199                                 } catch (DatabaseException e) {
 200                                         throw e;
 201                                 } catch (Exception e) {
 202                                         throw new DatabaseException(e);
 203                                 }
 204                         }
 205                 });
 206                 session.syncRequest(new WriteOnlyRequest(vg) {
 207                         @Override
 208                         public void perform(WriteOnlyGraph graph) throws DatabaseException {
 209                                 try {
 210                                     advisor.beforeWrite(graph, process);
 211                                         process.write(graph);
 212                     advisor.afterWrite(graph, process);
 213                                 } catch (Exception e) {
 214                                         throw new DatabaseException(e);
 215                                 }
 216                         }
 217                 });
 218
 219                 return new ImportResult(process.missingExternals);
 220         }
 221
 222         public static void importGraph1WithMonitor(Session session, final TransferableGraph1 tg, IImportAdvisor advisor_, TGStatusMonitor monitor) throws DatabaseException {
 223                 final IImportAdvisor2 advisor = (advisor_ instanceof IImportAdvisor2) ? ((IImportAdvisor2)advisor_) : new WrapperAdvisor(advisor_);
 224                 final TransferableGraphImportProcess process = new TransferableGraphImportProcess(tg,
 225                                 advisor == null ? new ImportAdvisor() : advisor, monitor);
 226                 session.syncRequest(new ReadRequest() {
 227                         @Override
 228                         public void run(ReadGraph graph) throws DatabaseException {
 229                                 process.prepare(graph);
 230                         }
 231                 });
 232                 session.syncRequest(new WriteOnlyRequest() {
 233                         @Override
 234                         public void perform(WriteOnlyGraph graph) throws DatabaseException {
 235                                 advisor.beforeWrite(graph, process);
 236                                 process.write2(graph);
 237                                 advisor.afterWrite(graph, process);
 238                                 CommentMetadata comments = graph.getMetadata(CommentMetadata.class);
 239                                 comments.add("Imported transferable graph with " + tg.resourceCount + " resources");
 240                                 graph.addMetadata(comments);
 241                         }
 242                 });
 243         }
 244
 245         public static void importGraph1WithChanges(Session session, final TransferableGraph1 tg, IImportAdvisor advisor, final BiFunction<WriteGraph, TransferableGraphImportProcess, Boolean> callback) throws DatabaseException, TransferableGraphException {
 246                 final TransferableGraphImportProcess process = new TransferableGraphImportProcess(tg,
 247                                 advisor == null ? new ImportAdvisor() : advisor);
 248                 session.syncRequest(new ReadRequest() {
 249                         @Override
 250                         public void run(ReadGraph graph) throws DatabaseException {
 251                                 process.prepare(graph);
 252                         }
 253                 });
 254                 session.syncRequest(new WriteRequest() {
 255                         @Override
 256                         public void perform(WriteGraph graph) throws DatabaseException {
 257                                 process.write2(graph);
 258                 CommentMetadata comments = graph.getMetadata(CommentMetadata.class);
 259                 comments.add("Imported transferable graph with " + tg.resourceCount + " resources");
 260                 graph.addMetadata(comments);
 261                                 if(callback != null)
 262                                         callback.apply(graph, process);
 263                         }
 264                 });
 265         }
 266
 267         public static long[] importGraph1(Session session, final TransferableGraph1 tg) throws DatabaseException, TransferableGraphException {
 268                 final TransferableGraphImportProcess process =
 269                         new TransferableGraphImportProcess(tg,
 270                                 null);
 271                 session.syncRequest(new ReadRequest() {
 272                         @Override
 273                         public void run(ReadGraph graph) throws DatabaseException {
 274                                 process.prepare(graph);
 275                         }
 276                 });
 277                 session.syncRequest(new WriteOnlyRequest() {
 278                         @Override
 279                         public void perform(WriteOnlyGraph graph) throws DatabaseException {
 280                                 process.write(graph);
 281                         }
 282                 });
 283                 return process.getResourceIds(
 284                                 session.getService(SerialisationSupport.class));
 285         }
 286
 287         public static long[] importGraph1(WriteGraph graph, final TransferableGraph1 tg) throws DatabaseException, TransferableGraphException {
 288                 final TransferableGraphImportProcess process =
 289                         new TransferableGraphImportProcess(tg,
 290                                 null);
 291                 process.prepare(graph);
 292                 process.write2(graph);
 293                 return process.getResourceIds(
 294                                 graph.getSession().getService(SerialisationSupport.class));
 295         }
 296
 297         /**
 298          * Import transferable graph version 1 to the database. Root advisor is used
 299          * to give identities to roots of the transferable graphs. It may be null,
 300          * in which case new resources are created for all roots but the root library.
 301          *
 302          * @param session
 303          * @param tg
 304      * @param advisor root advisor or <code>null</code>
 305          * @throws DatabaseException
 306          */
 307         public static long[] importGraph1(WriteGraph graph, TransferableGraph1 tg, IImportAdvisor advisor) throws DatabaseException {
 308             return importGraph1(graph, tg, advisor, null);
 309         }
 310
 311         public static long[] importGraph1(WriteGraph graph, TransferableGraph1 tg, IImportAdvisor advisor, TGStatusMonitor monitor) throws DatabaseException {
 312                 TransferableGraphImportProcess process = new TransferableGraphImportProcess(tg,
 313                                 advisor == null ? new ImportAdvisor() : advisor, monitor);
 314                 process.prepare(graph);
 315                 if(advisor instanceof IImportAdvisor2) ((IImportAdvisor2)advisor).beforeWrite(graph, process);
 316                 process.write2(graph);
 317                 if(advisor instanceof IImportAdvisor2) ((IImportAdvisor2)advisor).afterWrite(graph, process);
 318                 return process.getResourceIds(
 319                                 graph.getSession().getService(SerialisationSupport.class));
 320         }
 321
 322         public static long[] applyDelta(WriteGraph graph, long[] oldResources, TransferableGraphDelta1 delta) throws DatabaseException {
 323                 SerialisationSupport serializer =
 324                         graph.getSession().getService(SerialisationSupport.class);
 325
 326                 TGToGraphMap aMap = new TGToGraphMap(delta.a);
 327                 aMap.addOldResources(serializer, oldResources);
 328                 aMap.deny(graph);
 329
 330                 TGToGraphMap bMap = new TGToGraphMap(delta.b);
 331                 bMap.addMappedOldResources(serializer, delta.aToB, aMap.getResources());
 332                 bMap.prepare(graph);
 333                 bMap.claim(graph);
 334
 335                 return bMap.getResources(serializer);
 336         }
 337
 338         public static boolean hasChanges(ReadGraph graph, long[] oldResources, TransferableGraphDelta1 delta) throws DatabaseException {
 339
 340                 SerialisationSupport serializer =
 341                         graph.getSession().getService(SerialisationSupport.class);
 342
 343                 TGToGraphMap aMap = new TGToGraphMap(delta.a);
 344                 aMap.addOldResources(serializer, oldResources);
 345                 if(aMap.checkDeny(graph)) return true;
 346
 347                 TGToGraphMap bMap = new TGToGraphMap(delta.b);
 348                 bMap.addMappedOldResources(serializer, delta.aToB, aMap.getResources());
 349                 bMap.prepare(graph);
 350                 return bMap.checkClaim(graph);
 351
 352         }
 353
 354         public static void uninstallGraph(WriteGraph writeGraph, TransferableGraph1 graph,
 355                         ImportAdvisor advisor) throws TransferableGraphException {
 356                 // TODO HANNU IMPLEMENTS
 357                 throw new UnsupportedOperationException();
 358         }
 359
 360         public static long[] importVirtualGraph(Session session, final VirtualGraph vg, final TransferableGraph1 tg, IImportAdvisor advisor) throws DatabaseException {
 361                 final TransferableGraphImportProcess process = new TransferableGraphImportProcess(tg,
 362                                 advisor == null ? new ImportAdvisor() : advisor);
 363                 session.syncRequest(new ReadRequest() {
 364                         @Override
 365                         public void run(ReadGraph graph) throws DatabaseException {
 366                                 process.prepare(graph);
 367                         }
 368                 });
 369                 session.syncRequest(new WriteOnlyRequest(vg) {
 370                         @Override
 371                         public void perform(WriteOnlyGraph graph) throws DatabaseException {
 372                                 // Needed because process#write does not support virtual WriteOnlyGraph
 373                                 if (vg != null)
 374                                         process.write2(graph);
 375                                 else
 376                                         process.write(graph);
 377                         }
 378
 379                 });
 380                 return process.getResourceIds(session.getService(SerialisationSupport.class));
 381         }
 382
 383         public static long[] importVirtualGraph(WriteGraph graph, final TransferableGraph1 tg, IImportAdvisor advisor) throws DatabaseException {
 384                 final TransferableGraphImportProcess process = new TransferableGraphImportProcess(tg,
 385                                 advisor == null ? new ImportAdvisor() : advisor);
 386                 process.prepare(graph);
 387                 process.write2(graph);
 388                 return process.getResourceIds(graph.getService(SerialisationSupport.class));
 389         }
 390
 391         public static TransferableGraph1 readGraph(File file) throws TransferableGraphException {
 392                 FileVariantAccessor va = null;
 393                 try {
 394                         va = Accessors.openAccessor(file);
 395                         Datatype type = va.getContentType();
 396                         if(type.equals(Datatypes.getDatatype(TransferableGraph1.class)))
 397                                 return  (TransferableGraph1)va.getContentValue(Bindings.getBinding(TransferableGraph1.class));
 398                         else
 399                                 throw new SerializationException("Unknown transferable graph data type.");
 400                 } catch (AccessorException e) {
 401                         throw new TransferableGraphException(e);
 402                 } catch (BindingConstructionException e) {
 403                         throw new TransferableGraphException(e);
 404                 } catch (SerializationException e) {
 405                         throw new TransferableGraphException(e);
 406                 } catch (AccessorConstructionException e) {
 407                         throw new TransferableGraphException(e);
 408                 } catch (DatatypeConstructionException e) {
 409                         throw new TransferableGraphException(e);
 410                 } finally {
 411                         if(va != null) {
 412                                 try {
 413                                         va.close();
 414                                 } catch (AccessorException e) {
 415                                 }
 416                         }
 417                 }
 418         }
 419
 420         public static void importVirtualGraph(Session session, VirtualGraph vg, File file) throws TransferableGraphException {
 421                 try {
 422                         importVirtualGraph(session, vg, readGraph(file), new ImportAdvisor());
 423                 } catch (DatabaseException e) {
 424                         throw new TransferableGraphException(e);
 425                 }
 426         }
 427
 428         public static VirtualGraph importVirtualGraph(Session session, File file) throws TransferableGraphException {
 429                 VirtualGraphSupport support = session.getService(VirtualGraphSupport.class);
 430                 VirtualGraph vg = support.getMemoryPersistent(UUID.randomUUID().toString());
 431                 importVirtualGraph(session, vg, file);
 432                 return vg;
 433         }
 434
 435         public static void writeTransferableGraph(RequestProcessor processor, final String format, final TransferableGraphSource source, File target) throws Exception {
 436                 writeTransferableGraph(processor, format, 1, source, target);
 437         }
 438
 439         public static void writeTransferableGraph(RequestProcessor processor, final String format, final int version, final TransferableGraphSource source, File target) throws Exception {
 440                 writeTransferableGraph(processor, format, version, new TreeMap<String,Variant>(), source, target);
 441         }
 442
 443         public static void writeTransferableGraph(RequestProcessor processor, String format, int version, TreeMap<String, Variant> metadata, TransferableGraphSource source, File target) throws Exception {
 444                 writeTransferableGraph(processor, format, version, metadata, source, target, TGStatusMonitor.NULL_MONITOR);
 445         }
 446
 447         public static void writeTransferableGraph(RequestProcessor processor, String format, int version, TreeMap<String, Variant> metadata, TransferableGraphSource source, File target, TGStatusMonitor monitor) throws Exception {
 448                 try (RandomAccessBinary out = new BinaryFile(target, 128*1024)) {
 449                         DataContainers.writeHeader(out, new DataContainer(format, version, metadata, null));
 450                         writeTransferableGraphVariant(processor, source, out, monitor);
 451                 }
 452         }
 453
 454         public static void writeTransferableGraph(RequestProcessor processor, TransferableGraphSource source, File target, TGStatusMonitor monitor) throws Exception {
 455                 try (RandomAccessBinary out = new BinaryFile(target, 128*1024)) {
 456                         writeTransferableGraphVariant(processor, source, out, monitor);
 457                 }
 458         }
 459
 460         public static void writeTransferableGraphVariant(RequestProcessor processor, TransferableGraphSource source, RandomAccessBinary out, TGStatusMonitor monitor) throws Exception {
 461                 Bindings.getSerializerUnchecked(Datatype.class).serialize(out, Datatypes.getDatatypeUnchecked(TransferableGraph1.class));
 462                 writeTransferableGraph(processor, source, out, monitor);
 463         }
 464
 465         private static TGStatusMonitor safeMonitor(TGStatusMonitor mon) {
 466                 return mon == null ? TGStatusMonitor.NULL_MONITOR : mon;
 467         }
 468
 469         private static class CopyingInputStream extends InputStream {
 470                 public DataInput in;
 471                 public DataOutput out;
 472
 473                 @Override
 474                 public int read() throws IOException {
 475                         int value = in.readUnsignedByte();
 476                         out.write(value);
 477                         return value;
 478                 }
 479         }
 480
 481         private static long copy(byte[] buffer, DataInput in, DataOutput out, long bytesToCopy) throws IOException {
 482                 int read = 0;
 483                 long bufferLength = buffer.length;
 484                 while (read < bytesToCopy) {
 485                         int l = (int) Math.min(bufferLength, bytesToCopy-read);
 486                         in.readFully(buffer, 0, l);
 487                         out.write(buffer, 0, l);
 488                         read += l;
 489                 }
 490                 return read;
 491         }
 492
 493         private static final int LITERAL_VALUE_IO_BUFFER_SIZE = 128 * 1024;
 494
 495         private static void writeTransferableGraph(RequestProcessor processor, final TransferableGraphSource source, final RandomAccessBinary out, TGStatusMonitor monitor) throws Exception {
 496                 long start = System.nanoTime();
 497                 try {
 498                 final Serializer datatypeSerializer = Bindings.getSerializerUnchecked(Datatype.class);
 499                 final Serializer identitySerializer = Bindings.getSerializerUnchecked(Identity.class);
 500                 final Serializer extensionSerializer = Bindings.getSerializerUnchecked(Extensions.class);
 501
 502                 int resourceCount = source.getResourceCount();
 503                 //System.err.println("resourceCount: " + resourceCount);
 504                 out.writeInt(resourceCount);
 505                 extensionSerializer.serialize(out, new Extensions(source.getExtensions()));
 506
 507 //              System.err.println("resource count: " + source.getResourceCount());
 508 //              System.err.println("identity count: " + source.getIdentityCount());
 509
 510                 byte[] buffer = new byte[LITERAL_VALUE_IO_BUFFER_SIZE];
 511
 512                 processor.syncRequest(new ReadRequest() {
 513                         @Override
 514                         public void run(ReadGraph graph) throws DatabaseException {
 515                                 try {
 516                                         if (monitor.isCanceled())
 517                                                 throw new CancelTransactionException();
 518
 519                                         int identityCount = source.getIdentityCount();
 520                                         TGStatusMonitor.Updater identityProgress = new TGStatusMonitor.Updater(safeMonitor(monitor), 0, 33, identityCount);
 521                                         out.writeInt(identityCount);
 522                                         //System.err.println("identities: " + identityCount);
 523                                         source.forIdentities(graph, value -> {
 524                                                 //System.err.println("id: " + value);
 525                                                 identitySerializer.serialize(out, value);
 526                                                 identityProgress.worked(1);
 527                                         });
 528
 529                                         if (monitor.isCanceled())
 530                                                 throw new CancelTransactionException();
 531
 532                                         long statementCountPos = out.position();
 533                                         int originalStatementCount = source.getStatementCount();
 534                                         TGStatusMonitor.Updater statementProgress = new TGStatusMonitor.Updater(safeMonitor(monitor), 34, 66, originalStatementCount);
 535                                         out.writeInt(originalStatementCount);
 536                                         //System.err.println("original statementCount: " + originalStatementCount);
 537                                         int[] statementCounter = { 0 };
 538                                         source.forStatements(graph, r -> {
 539                                                 for (int i = 0; i < 4; ++i)
 540                                                         out.writeInt(r[i]);
 541                                                 statementCounter[0]++;
 542                                                 //System.err.println("stm " + (statementCounter[0]) + ": " + r[0] + " " + r[1] + " " + r[2] + " " + r[3]);
 543                                                 statementProgress.worked(1);
 544                                         });
 545                                         //System.err.println("wrote " + statementCounter[0] + " statements, " + (statementCounter[0]*4)+ " integers");
 546
 547                                         // Rewrite statement count after knowing exactly how many
 548                                         // statements were written. It is possible that some
 549                                         // statements get filtered out at this stage and the
 550                                         // original statement count does not reflect that.
 551                                         long afterStatementsPos = out.position();
 552                                         out.position(statementCountPos);
 553                                         out.writeInt(statementCounter[0]*4);
 554                                         out.position(afterStatementsPos);
 555
 556                                         if (monitor.isCanceled())
 557                                                 throw new CancelTransactionException();
 558
 559                                         int valueCount = source.getValueCount();
 560                                         TGStatusMonitor.Updater valueProgress = new TGStatusMonitor.Updater(safeMonitor(monitor), 67, 100, valueCount);
 561                                         out.writeInt(valueCount);
 562 //                                      System.err.println("valueCount: " + valueCount);
 563                                         CopyingInputStream cis = new CopyingInputStream();
 564                                         cis.out = out;
 565                                         source.forValues2(graph, new TransferableGraphSourceValueProcedure() {
 566                                                 TObjectIntHashMap<Object> identities = new TObjectIntHashMap<>();
 567
 568                                                 @Override
 569                                                 public void rawCopy(int resource, int length, DataInput input) throws Exception {
 570                                                         out.writeInt(resource);
 571                                                         long copied = copy(buffer, input, out, length);
 572                                                         assert copied == length;
 573                                                         //System.err.println("value " + (num++) + ": raw variant, " + length + " bytes, copied " + copied + " bytes");
 574                                                         valueProgress.worked(1);
 575                                                 }
 576
 577                                                 @Override
 578                                                 public void execute(int resource, Datatype type, DataInput input) throws Exception {
 579                                                         out.writeInt(resource);
 580                                                         identities.clear();
 581                                                         datatypeSerializer.serialize(out, identities, type);
 582                                                         Binding binding = Bindings.getBinding(type);
 583                                                         Serializer serializer = Bindings.getSerializer(binding);
 584                                                         cis.in = input;
 585                                                         serializer.skip(cis);
 586                                                         cis.in = null;
 587                                                         valueProgress.worked(1);
 588                                                 }
 589                                         });
 590
 591                                 } catch (DatabaseException e) {
 592                                         throw e;
 593                                 } catch (Exception e) {
 594                                         throw new DatabaseException(e);
 595                                 }
 596                         }
 597                 });
 598                 } finally {
 599                         source.close();
 600                 }
 601
 602                 long end = System.nanoTime();
 603                 LOGGER.info("Wrote transferable graph in {} seconds.", 1e-9*(end-start));
 604         }
 605
 606         public static TransferableGraph1 create(ReadGraph graph, TransferableGraphSource source) throws DatabaseException {
 607
 608                 try {
 609
 610                         ArrayList<Identity> identities = new ArrayList<>(source.getIdentityCount());
 611                         source.forIdentities(graph, i -> identities.add(i));
 612                         TIntArrayList statements = new TIntArrayList(source.getStatementCount());
 613                         source.forStatements(graph, r -> statements.addAll(r));
 614                         ArrayList<Value> values = new ArrayList<>(source.getValueCount());
 615                         source.forValues(graph, v -> values.add(v));
 616
 617                         return new TransferableGraph1(source.getResourceCount(),
 618                                         identities.toArray(new Identity[identities.size()]),
 619                                         statements.toArray(),
 620                                         values.toArray(new Value[values.size()]),
 621                                         source.getExtensions());
 622
 623                 } catch (Exception e) {
 624
 625                         throw new DatabaseException(e);
 626
 627                 }
 628
 629         }
 630
 631 }