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 import org.slf4j.Logger;
  30 import org.slf4j.LoggerFactory;
  31
  32 public class SpecialNodeType implements NodeType {
  33
  34     private static final Logger LOGGER = LoggerFactory.getLogger(SpecialNodeType.class);
  35
  36     public Resource resource;
  37     Class<?> contentType;
  38
  39     public SpecialNodeType(Resource resource, Class<?> contentType) {
  40         this.resource = resource;
  41         this.contentType = contentType;
  42     }
  43
  44     public static SpecialNodeType create(ReadGraph g, Resource r) throws DatabaseException {
  45         ViewpointResource vr = ViewpointResource.getInstance(g);
  46         String contentTypeName = g.getPossibleRelatedValue(r, vr.HasContentType);
  47         Class<?> contentType;
  48         if("Resource".equals(contentTypeName))
  49             contentType = Resource.class;
  50         else if("Statement".equals(contentTypeName))
  51             contentType = Statement.class;
  52         else if("Variable".equals(contentTypeName))
  53             contentType = Variable.class;
  54         else {
  55             contentType = Object.class;
  56             if(contentTypeName != null)
  57                 try {
  58                     String bundleId = g.getPossibleRelatedValue(r, vr.HasBundle);
  59                     Bundle bundle = null;
  60                     if (bundleId != null) {
  61                         bundle = Platform.getBundle(bundleId);
  62                         if (bundle == null)
  63                             LOGGER.warn("Referenced bundle '" + bundleId + "' not found in platform.");
  64                     }
  65                     if (bundle != null)
  66                         contentType = bundle.loadClass(contentTypeName);
  67                     else
  68                         contentType = Class.forName(contentTypeName);
  69                 } catch (ClassNotFoundException e) {
  70                     LOGGER.error("Unknown content type {} - {}", contentTypeName, e.getMessage());
  71                     if (LOGGER.isTraceEnabled())
  72                         LOGGER.trace("Unknown content type {}", contentTypeName, e);
  73                 }
  74             else
  75                 LOGGER.warn("Content type is NULL.");
  76         }
  77         return new SpecialNodeType(r, contentType);
  78     }
  79
  80     @Override
  81     public NodeContext createNodeContext(ReadGraph graph, Object content)
  82             throws DatabaseException {
  83         if(contentType.isInstance(content))
  84             return NodeContextBuilder.buildWithData(KEY_SEQUENCE,
  85                     new Object[] {content, this}
  86             );
  87         else
  88             return null;
  89     }
  90
  91     @Override
  92     public Class<?> getContentType() {
  93         return contentType;
  94     }
  95
  96     @Override
  97     public int hashCode() {
  98         return resource.hashCode();
  99     }
 100
 101     @Override
 102     public boolean equals(Object obj) {
 103         if (this == obj)
 104             return true;
 105         if (obj == null)
 106             return false;
 107         if (getClass() != obj.getClass())
 108             return false;
 109         SpecialNodeType other = (SpecialNodeType) obj;
 110         return resource.equals(other.resource);
 111     }
 112
 113     @Override
 114     public boolean inherits(ReadGraph graph, NodeType superType) {
 115         // Special node type does not support inheritance
 116         return equals(superType);
 117     }
 118
 119     @Override
 120     public Collection<NodeType> getSuper(ReadGraph g) {
 121         return Collections.emptyList();
 122     }
 123
 124     @Override
 125     public String toString(ReadGraph graph) throws DatabaseException {
 126         return "(" + NameUtils.getSafeName(graph, resource) + ")";
 127     }
 128
 129     @Override
 130     public WorkbenchSelectionElement getWorkbenchSelectionElement(NodeContext context) {
 131         return null;
 132     }
 133
 134 }