bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/contributor/viewpoint/ViewpointContributorImpl.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
   3  * in 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.graph.impl.contributor.viewpoint;\r
  13 \r
  14 import java.util.Collection;\r
  15 import java.util.Collections;\r
  16 \r
  17 import org.simantics.browsing.ui.BuiltinKeys;\r
  18 import org.simantics.browsing.ui.BuiltinKeys.ViewpointContributionKey;\r
  19 import org.simantics.browsing.ui.NodeContext;\r
  20 import org.simantics.browsing.ui.PrimitiveQueryUpdater;\r
  21 import org.simantics.browsing.ui.Tester;\r
  22 import org.simantics.browsing.ui.common.NodeContextUtil;\r
  23 import org.simantics.browsing.ui.content.Contributor;\r
  24 import org.simantics.browsing.ui.content.ViewpointContribution;\r
  25 import org.simantics.browsing.ui.content.ViewpointContributionFactory;\r
  26 import org.simantics.browsing.ui.graph.impl.contribution.ViewpointContributionImpl;\r
  27 import org.simantics.db.ReadGraph;\r
  28 import org.simantics.db.exception.DatabaseException;\r
  29 import org.simantics.db.layer0.exception.InvalidVariableException;\r
  30 import org.simantics.layer0.Layer0;\r
  31 import org.simantics.operation.Layer0X;\r
  32 import org.simantics.utils.ReflectionUtils;\r
  33 \r
  34 abstract public class ViewpointContributorImpl<T> implements Contributor<ViewpointContributionFactory> {\r
  35 \r
  36     abstract public Collection<?> getContribution(ReadGraph graph, T input) throws DatabaseException;\r
  37 \r
  38     abstract public String getViewpointId();\r
  39 \r
  40     final private Class<?> clazz;\r
  41     \r
  42     protected Layer0 L0;\r
  43     protected Layer0X L0X;\r
  44 \r
  45     @Override\r
  46     public Tester getNodeContextTester() {\r
  47         return null;\r
  48     }\r
  49 \r
  50     public ViewpointContributorImpl() {\r
  51         clazz = ReflectionUtils.getSingleParameterType(getClass());\r
  52     }\r
  53 \r
  54     public ViewpointContributorImpl(Class<?> clazz) {\r
  55         this.clazz = clazz;\r
  56     }\r
  57 \r
  58     @Override\r
  59     public ViewpointContributionFactory getFactory() {\r
  60 \r
  61         return new ViewpointContributionFactory() {\r
  62 \r
  63             @Override\r
  64             public String getViewpointId() {\r
  65                 return ViewpointContributorImpl.this.getViewpointId();\r
  66             }\r
  67 \r
  68             @Override\r
  69             public ViewpointContribution create(final PrimitiveQueryUpdater updater, NodeContext context, final ViewpointContributionKey key) {\r
  70 \r
  71                 return new ViewpointContributionImpl(updater, context, key) {\r
  72 \r
  73                     @SuppressWarnings("unchecked")\r
  74                     @Override\r
  75                     public Collection<NodeContext> children(ReadGraph graph, NodeContext context) throws DatabaseException {\r
  76 \r
  77                         try {\r
  78                             T input = (T)context.getConstant(BuiltinKeys.INPUT);\r
  79                             L0 = Layer0.getInstance(graph);\r
  80                             L0X = Layer0X.getInstance(graph);\r
  81                             return NodeContextUtil.toContextCollectionWithInput(ViewpointContributorImpl.this, ViewpointContributorImpl.this.getContribution(graph, input));\r
  82                         } catch (InvalidVariableException e) {\r
  83                             return Collections.emptyList();\r
  84                         }\r
  85 \r
  86                     }\r
  87 \r
  88                     @Override\r
  89                     public Tester getNodeContextTester() {\r
  90                         return ViewpointContributorImpl.this.getNodeContextTester();\r
  91                     }\r
  92 \r
  93                     @Override\r
  94                     public Class<?> getInputClass() {\r
  95                         return ViewpointContributorImpl.this.getInputClass();\r
  96                     }\r
  97 \r
  98                 };\r
  99 \r
 100             }\r
 101 \r
 102         };\r
 103 \r
 104     }\r
 105 \r
 106     @Override\r
 107     public Class<?> getInputClass() {\r
 108         return clazz;\r
 109     }\r
 110 \r
 111 }\r