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

   1 /*******************************************************************************\r
   2  * Copyright (c) 2010, 2011 Association for Decentralized Information Management in\r
   3  * Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.browsing.ui.model.nodetypes;\r
  13 \r
  14 import java.util.Collection;\r
  15 import java.util.Collections;\r
  16 \r
  17 import org.eclipse.core.runtime.Platform;\r
  18 import org.osgi.framework.Bundle;\r
  19 import org.simantics.browsing.ui.NodeContext;\r
  20 import org.simantics.browsing.ui.common.NodeContextBuilder;\r
  21 import org.simantics.db.ReadGraph;\r
  22 import org.simantics.db.Resource;\r
  23 import org.simantics.db.Statement;\r
  24 import org.simantics.db.common.utils.NameUtils;\r
  25 import org.simantics.db.exception.DatabaseException;\r
  26 import org.simantics.db.layer0.variable.Variable;\r
  27 import org.simantics.ui.selection.WorkbenchSelectionElement;\r
  28 import org.simantics.viewpoint.ontology.ViewpointResource;\r
  29 \r
  30 public class SpecialNodeType implements NodeType {\r
  31     public Resource resource;\r
  32     Class<?> contentType;\r
  33     \r
  34     public SpecialNodeType(Resource resource, Class<?> contentType) {\r
  35         this.resource = resource;\r
  36         this.contentType = contentType;\r
  37     }\r
  38     \r
  39     public static SpecialNodeType create(ReadGraph g, Resource r) throws DatabaseException {\r
  40         ViewpointResource vr = ViewpointResource.getInstance(g);\r
  41         String contentTypeName = g.getPossibleRelatedValue(r, vr.HasContentType);\r
  42         Class<?> contentType;\r
  43         if("Resource".equals(contentTypeName))\r
  44             contentType = Resource.class;\r
  45         else if("Statement".equals(contentTypeName))\r
  46             contentType = Statement.class;\r
  47         else if("Variable".equals(contentTypeName))\r
  48             contentType = Variable.class;\r
  49         else {\r
  50             contentType = Object.class;\r
  51             if(contentTypeName != null)\r
  52                 try {\r
  53                     String bundleId = g.getPossibleRelatedValue(r, vr.HasBundle);\r
  54                     Bundle bundle = null;\r
  55                     if (bundleId != null) {\r
  56                         bundle = Platform.getBundle(bundleId);\r
  57                         if (bundle == null)\r
  58                             System.err.println("Referenced bundle '" + bundleId + "' not found in platform.");\r
  59                     }\r
  60                     if (bundle != null)\r
  61                         contentType = bundle.loadClass(contentTypeName);\r
  62                     else\r
  63                         contentType = Class.forName(contentTypeName);\r
  64                 } catch (ClassNotFoundException e) {\r
  65                     System.err.println("Unknown content type " + contentTypeName);\r
  66                 }\r
  67             else\r
  68                 System.err.println("Content type is NULL.");\r
  69         }\r
  70         return new SpecialNodeType(r, contentType);\r
  71     }\r
  72 \r
  73     @Override\r
  74     public NodeContext createNodeContext(ReadGraph graph, Object content)\r
  75             throws DatabaseException {\r
  76         if(contentType.isInstance(content))\r
  77             return NodeContextBuilder.buildWithData(KEY_SEQUENCE,\r
  78                     new Object[] {content, this}\r
  79             );\r
  80         else\r
  81             return null;\r
  82     }\r
  83 \r
  84     @Override\r
  85     public Class<?> getContentType() {\r
  86         return contentType;\r
  87     }\r
  88 \r
  89     @Override\r
  90     public int hashCode() {\r
  91         return resource.hashCode();\r
  92     }\r
  93 \r
  94     @Override\r
  95     public boolean equals(Object obj) {\r
  96         if (this == obj)\r
  97             return true;\r
  98         if (obj == null)\r
  99             return false;\r
 100         if (getClass() != obj.getClass())\r
 101             return false;\r
 102         SpecialNodeType other = (SpecialNodeType) obj;\r
 103         return resource.equals(other.resource);\r
 104     }\r
 105 \r
 106     @Override\r
 107     public boolean inherits(ReadGraph graph, NodeType superType) {\r
 108         // Special node type does not support inheritance\r
 109         return equals(superType);\r
 110     }\r
 111 \r
 112     @Override\r
 113     public Collection<NodeType> getSuper(ReadGraph g) {\r
 114         return Collections.emptyList();\r
 115     }\r
 116     \r
 117     @Override\r
 118     public String toString(ReadGraph graph) throws DatabaseException {\r
 119         return "(" + NameUtils.getSafeName(graph, resource) + ")";\r
 120     }\r
 121 \r
 122     @Override\r
 123     public WorkbenchSelectionElement getWorkbenchSelectionElement(NodeContext context) {\r
 124         return null;\r
 125     }\r
 126 \r
 127 }\r