bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/nodetypes/SpecialNodeType.java

   1 /*******************************************************************************
   2  * Copyright (c) 2010, 2011 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.browsing.ui.model.nodetypes;
  13
  14 import java.util.Collection;
  15 import java.util.Collections;
  16
  17 import org.eclipse.core.runtime.Platform;
  18 import org.osgi.framework.Bundle;
  19 import org.simantics.browsing.ui.NodeContext;
  20 import org.simantics.browsing.ui.common.NodeContextBuilder;
  21 import org.simantics.db.ReadGraph;
  22 import org.simantics.db.Resource;
  23 import org.simantics.db.Statement;
  24 import org.simantics.db.common.utils.NameUtils;
  25 import org.simantics.db.exception.DatabaseException;
  26 import org.simantics.db.layer0.variable.Variable;
  27 import org.simantics.ui.selection.WorkbenchSelectionElement;
  28 import org.simantics.viewpoint.ontology.ViewpointResource;
  29
  30 public class SpecialNodeType implements NodeType {
  31     public Resource resource;
  32     Class<?> contentType;
  33
  34     public SpecialNodeType(Resource resource, Class<?> contentType) {
  35         this.resource = resource;
  36         this.contentType = contentType;
  37     }
  38
  39     public static SpecialNodeType create(ReadGraph g, Resource r) throws DatabaseException {
  40         ViewpointResource vr = ViewpointResource.getInstance(g);
  41         String contentTypeName = g.getPossibleRelatedValue(r, vr.HasContentType);
  42         Class<?> contentType;
  43         if("Resource".equals(contentTypeName))
  44             contentType = Resource.class;
  45         else if("Statement".equals(contentTypeName))
  46             contentType = Statement.class;
  47         else if("Variable".equals(contentTypeName))
  48             contentType = Variable.class;
  49         else {
  50             contentType = Object.class;
  51             if(contentTypeName != null)
  52                 try {
  53                     String bundleId = g.getPossibleRelatedValue(r, vr.HasBundle);
  54                     Bundle bundle = null;
  55                     if (bundleId != null) {
  56                         bundle = Platform.getBundle(bundleId);
  57                         if (bundle == null)
  58                             System.err.println("Referenced bundle '" + bundleId + "' not found in platform.");
  59                     }
  60                     if (bundle != null)
  61                         contentType = bundle.loadClass(contentTypeName);
  62                     else
  63                         contentType = Class.forName(contentTypeName);
  64                 } catch (ClassNotFoundException e) {
  65                     System.err.println("Unknown content type " + contentTypeName);
  66                 }
  67             else
  68                 System.err.println("Content type is NULL.");
  69         }
  70         return new SpecialNodeType(r, contentType);
  71     }
  72
  73     @Override
  74     public NodeContext createNodeContext(ReadGraph graph, Object content)
  75             throws DatabaseException {
  76         if(contentType.isInstance(content))
  77             return NodeContextBuilder.buildWithData(KEY_SEQUENCE,
  78                     new Object[] {content, this}
  79             );
  80         else
  81             return null;
  82     }
  83
  84     @Override
  85     public Class<?> getContentType() {
  86         return contentType;
  87     }
  88
  89     @Override
  90     public int hashCode() {
  91         return resource.hashCode();
  92     }
  93
  94     @Override
  95     public boolean equals(Object obj) {
  96         if (this == obj)
  97             return true;
  98         if (obj == null)
  99             return false;
 100         if (getClass() != obj.getClass())
 101             return false;
 102         SpecialNodeType other = (SpecialNodeType) obj;
 103         return resource.equals(other.resource);
 104     }
 105
 106     @Override
 107     public boolean inherits(ReadGraph graph, NodeType superType) {
 108         // Special node type does not support inheritance
 109         return equals(superType);
 110     }
 111
 112     @Override
 113     public Collection<NodeType> getSuper(ReadGraph g) {
 114         return Collections.emptyList();
 115     }
 116
 117     @Override
 118     public String toString(ReadGraph graph) throws DatabaseException {
 119         return "(" + NameUtils.getSafeName(graph, resource) + ")";
 120     }
 121
 122     @Override
 123     public WorkbenchSelectionElement getWorkbenchSelectionElement(NodeContext context) {
 124         return null;
 125     }
 126
 127 }