bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/GraphPropertyUtil.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.browsing.ui.graph.impl;
  13
  14 import java.lang.reflect.Array;
  15 import java.util.Collection;
  16
  17 import org.simantics.browsing.ui.NodeContext;
  18 import org.simantics.browsing.ui.common.NodeContextUtil;
  19 import org.simantics.browsing.ui.common.property.IArrayProperty;
  20 import org.simantics.browsing.ui.common.property.IProperty;
  21 import org.simantics.browsing.ui.common.property.IPropertyFactory;
  22 import org.simantics.browsing.ui.common.property.PropertyUtil;
  23 import org.simantics.browsing.ui.common.property.PropertyUtil.ValueType;
  24 import org.simantics.databoard.Bindings;
  25 import org.simantics.databoard.adapter.AdaptException;
  26 import org.simantics.databoard.binding.error.RuntimeBindingConstructionException;
  27 import org.simantics.databoard.type.ArrayType;
  28 import org.simantics.databoard.type.Datatype;
  29 import org.simantics.db.ReadGraph;
  30 import org.simantics.db.Resource;
  31 import org.simantics.db.common.utils.OrderedSetUtils;
  32 import org.simantics.db.exception.DatabaseException;
  33 import org.simantics.db.exception.DoesNotContainValueException;
  34 import org.simantics.layer0.Layer0;
  35 import org.simantics.utils.datastructures.slice.ValueRange;
  36
  37 /**
  38  * A utility on top of the generic {@link PropertyUtil} for working with graph
  39  * database properties.
  40  *
  41  * @author Tuukka Lehtonen
  42  */
  43 public class GraphPropertyUtil {
  44
  45     /**
  46      * @param graph
  47      * @param resource
  48      * @param sizeHint
  49      * @return
  50      * @throws DatabaseException
  51      */
  52     public static String tryGetValueTypeString(ReadGraph graph, Resource resource, int sizeHint) throws DatabaseException {
  53         Layer0 l0 = Layer0.getInstance(graph);
  54         if (graph.isInstanceOf(resource, l0.OrderedSet))
  55             return "list"; // FIXME
  56
  57         try {
  58             Resource literalType = graph.getSingleType(resource, l0.Literal);
  59             String literalTypeName = graph.getRelatedValue(literalType, l0.HasName, Bindings.STRING);
  60             Datatype dt = graph.getDataType(resource);
  61             String typeString = null;
  62             if (dt instanceof ArrayType) {
  63                 ArrayType at = (ArrayType) dt;
  64                 at = (ArrayType) Bindings.getBindingUnchecked(Datatype.class).clone(at);
  65                 at.setLength("" + sizeHint);
  66                 typeString = at.toSingleLineString();
  67             } else {
  68                 typeString = dt.toSingleLineString();
  69             }
  70             return literalTypeName + " : " + typeString;
  71         } catch (RuntimeBindingConstructionException e) {
  72             // Shouldn't happen
  73         } catch (AdaptException e) {
  74             // Shouldn't happen
  75         } catch (DatabaseException e) {
  76         }
  77
  78         // Fallback to OLD logic for some kind of backwards compatibility
  79         if (!graph.isInstanceOf(resource, l0.Literal))
  80             return ValueType.toString(ValueType.NoValue);
  81         try {
  82             Object value = graph.getValue(resource);
  83             return ValueType.toString(ValueType.convert(value));
  84         } catch (DoesNotContainValueException ee) {
  85             return ValueType.toString(ValueType.NoValue);
  86         }
  87     }
  88
  89     public static <T extends IProperty> T createProperty(ReadGraph graph, Resource resource, IPropertyFactory<T> propertyFactory) throws DatabaseException {
  90 //      System.out.println("createProperty: " + GraphUtils.getReadableName(graph, resource));
  91         T t = tryCreateProperty(graph, resource, propertyFactory);
  92         if (t != null)
  93             return t;
  94         return propertyFactory.create(null);
  95     }
  96
  97     /**
  98      * @param <T>
  99      * @param graph
 100      * @param resource
 101      * @param propertyFactory
 102      * @return <code>null</code> if the specified resource is neither an
 103      *         enumerated value or an L0.Value instance
 104      * @throws DatabaseException
 105      */
 106     public static <T extends IProperty> T tryCreateProperty(ReadGraph graph, Resource resource, IPropertyFactory<T> propertyFactory) throws DatabaseException {
 107 //        System.out.println("tryCreateProperty: " + GraphUtils.getReadableName(graph, resource));
 108
 109         boolean isEnum = IsEnumeratedValue.isEnumeratedValue(graph, resource);
 110         if (isEnum) {
 111             //System.out.println("isEnum: " + GraphUtils.getReadableName(graph, resource));
 112             return propertyFactory.create(null);
 113         }
 114         Layer0 l0 = Layer0.getInstance(graph);
 115         boolean isLiteral = graph.isInstanceOf(resource, l0.Literal);
 116         if (isLiteral) {
 117             //System.out.println("isValue: " + GraphUtils.getReadableName(graph, resource));
 118             try {
 119                 Object value = graph.getValue(resource);
 120                 //System.out.println("  VALUE: " + value);
 121                 if(value.getClass().isArray()) {
 122                     //System.out.println("    IS ARRAY");
 123                     int size = Array.getLength(value);
 124                     if (size > 1)
 125                         return propertyFactory.create(ValueRange.make(0, size));
 126                     if (size == 0)
 127                         return propertyFactory.create(ValueRange.make(0, 0));
 128                 }
 129                 return propertyFactory.create(null);
 130             } catch (DoesNotContainValueException e) {
 131             }
 132         } else {
 133             // Check if is list..
 134             boolean isList = graph.isInstanceOf(resource, l0.OrderedSet);
 135             //System.out.println("IS LIST ? "+isList);
 136             if(isList) {
 137                 int size = OrderedSetUtils.toList(graph, resource).size();
 138                 //System.out.println("list size "+size);
 139                 return propertyFactory.create(ValueRange.make(0, size));
 140             }
 141         }
 142         return null;
 143     }
 144
 145     public static <T extends IProperty> NodeContext[] tryValueGetChildren(ReadGraph graph, Resource resource, IPropertyFactory<T> propertyFactory) throws DatabaseException {
 146         T property = tryCreateProperty(graph, resource, propertyFactory);
 147         if (property == null)
 148             return null;
 149
 150         if (property instanceof IArrayProperty) {
 151             IArrayProperty array = (IArrayProperty) property;
 152             ValueRange range = array.getRange();
 153
 154             Collection<IArrayProperty> children = PropertyUtil.subnodify(array, 0, range.size());
 155             return NodeContextUtil.toContextsWithInput(children);
 156         }
 157
 158         // Plain properties do not have children.
 159         return NodeContext.NONE;
 160     }
 161
 162     /**
 163      * @param graph
 164      * @param r
 165      * @return <code>null</code> if this is not a value,
 166      *         <code>Boolean.FALSE</code> if this is a scalar value and
 167      *         <code>Boolean.TRUE</code> if this is a vector value.
 168      */
 169     public static Boolean tryValueHasChildren(ReadGraph graph, Resource r) throws DatabaseException {
 170         Layer0 l0 = Layer0.getInstance(graph);
 171         if (graph.isInstanceOf(r, l0.Literal)) {
 172             try {
 173                 Object o = graph.getValue(r);
 174                 return Boolean.valueOf(Array.getLength(o) > 1);
 175             } catch (DoesNotContainValueException e) {
 176                 return Boolean.FALSE;
 177             }
 178         }
 179         return null;
 180     }
 181
 182 }