1 /*******************************************************************************
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2 * Copyright (c) 2010, 2011 Association for Decentralized Information Management in
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.browsing.ui.model.nodetypes;
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14 import java.util.ArrayList;
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15 import java.util.Collection;
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16 import java.util.Collections;
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17 import java.util.List;
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18 import java.util.WeakHashMap;
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20 import org.simantics.browsing.ui.NodeContext;
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21 import org.simantics.browsing.ui.common.NodeContextBuilder;
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22 import org.simantics.db.ReadGraph;
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23 import org.simantics.db.Resource;
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24 import org.simantics.db.common.utils.NameUtils;
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25 import org.simantics.db.exception.DatabaseException;
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26 import org.simantics.layer0.Layer0;
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27 import org.simantics.ui.selection.WorkbenchSelectionElement;
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30 * A node type that corresponds to some entity type.
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31 * @author Hannu Niemistö
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33 public class EntityNodeType implements NodeType {
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34 public List<Resource> entityTypes;
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35 private static final WeakHashMap<List<Resource>, EntityNodeType> nodeTypeCache =
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36 new WeakHashMap<List<Resource>, EntityNodeType>();
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38 private EntityNodeType(List<Resource> entityTypes) {
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39 this.entityTypes = entityTypes;
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42 public static EntityNodeType create(Resource entityType) {
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43 List<Resource> entityTypes = Collections.singletonList(entityType);
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44 synchronized(nodeTypeCache) {
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45 EntityNodeType result = nodeTypeCache.get(entityTypes);
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46 if(result == null) {
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47 result = new EntityNodeType(entityTypes);
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48 nodeTypeCache.put(entityTypes, result);
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54 public static EntityNodeType create(Collection<Resource> entityTypes) {
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55 return createInternal(new ArrayList<Resource>(entityTypes));
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58 private static EntityNodeType createInternal(ArrayList<Resource> entityTypes) {
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59 if(entityTypes.isEmpty())
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60 throw new IllegalArgumentException();
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61 else if(entityTypes.size() == 1)
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62 return create(entityTypes.get(0));
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64 Collections.sort(entityTypes);
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65 synchronized(nodeTypeCache) {
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66 EntityNodeType result = nodeTypeCache.get(entityTypes);
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67 if(result == null) {
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68 result = new EntityNodeType(entityTypes);
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69 nodeTypeCache.put(entityTypes, result);
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76 public static NodeType getNodeTypeFor(ReadGraph graph, Resource resource) throws DatabaseException {
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77 ArrayList<Resource> types = new ArrayList<Resource>(graph.getPrincipalTypes(resource));
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81 return createInternal(types);
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84 public NodeType getNodeTypeOf(ReadGraph graph, Resource resource) throws DatabaseException {
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85 ArrayList<Resource> types = new ArrayList<Resource>();
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87 for(Resource t : graph.getPrincipalTypes(resource)) {
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88 for(Resource et : entityTypes)
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89 if(!graph.isInheritedFrom(t, et))
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97 return createInternal(types);
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101 public NodeContext createNodeContext(ReadGraph graph, Object content)
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102 throws DatabaseException {
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103 if(content instanceof Resource) {
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104 Resource resource = (Resource)content;
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105 NodeType nodeType = getNodeTypeOf(graph, resource);
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106 if(nodeType != null)
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107 return NodeContextBuilder.buildWithData(KEY_SEQUENCE,
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108 new Object[] {content, nodeType});
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114 public Class<?> getContentType() {
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115 return Resource.class;
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119 public int hashCode() {
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120 return entityTypes.hashCode();
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124 public boolean equals(Object obj) {
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129 if (getClass() != obj.getClass())
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131 EntityNodeType other = (EntityNodeType) obj;
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132 return entityTypes.equals(other.entityTypes);
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136 public boolean inherits(ReadGraph graph, NodeType superType) throws DatabaseException {
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137 if(this == superType)
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139 if (superType.getClass() != EntityNodeType.class)
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142 for(Resource st : ((EntityNodeType)superType).entityTypes) {
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143 for(Resource t : entityTypes)
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144 if(graph.isInheritedFrom(t, st))
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152 public Collection<NodeType> getSuper(ReadGraph g) throws DatabaseException {
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153 if(entityTypes.size() == 1) {
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154 Layer0 l0 = Layer0.getInstance(g);
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155 Collection<Resource> supertypes = g.getObjects(entityTypes.get(0), l0.Inherits);
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156 ArrayList<NodeType> supernodetypes = new ArrayList<NodeType>(supertypes.size());
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157 for(Resource supertype : supertypes)
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158 supernodetypes.add(create(supertype));
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159 return supernodetypes;
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162 ArrayList<NodeType> supernodetypes = new ArrayList<NodeType>(entityTypes.size());
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163 for(Resource t : entityTypes)
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164 supernodetypes.add(create(t));
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165 return supernodetypes;
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170 public String toString(ReadGraph graph) throws DatabaseException {
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171 StringBuilder b = new StringBuilder();
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173 boolean first = true;
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174 for(Resource t : entityTypes) {
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179 b.append(NameUtils.getSafeName(graph, t));
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182 return b.toString();
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186 public WorkbenchSelectionElement getWorkbenchSelectionElement(NodeContext context) {
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187 // TODO Auto-generated method stub
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