bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/contributor/labeler/CheckedStateContributorImpl.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.labeler;\r
  13 \r
  14 import org.simantics.browsing.ui.BuiltinKeys;\r
  15 import org.simantics.browsing.ui.CheckedState;\r
  16 import org.simantics.browsing.ui.NodeContext;\r
  17 import org.simantics.browsing.ui.PrimitiveQueryUpdater;\r
  18 import org.simantics.browsing.ui.Tester;\r
  19 import org.simantics.browsing.ui.BuiltinKeys.CheckedStateKey;\r
  20 import org.simantics.browsing.ui.content.CheckedStateFactory;\r
  21 import org.simantics.browsing.ui.content.Contributor;\r
  22 import org.simantics.browsing.ui.graph.impl.contribution.CheckedStateContributionImpl;\r
  23 import org.simantics.db.ReadGraph;\r
  24 import org.simantics.db.exception.DatabaseException;\r
  25 import org.simantics.utils.ReflectionUtils;\r
  26 \r
  27 abstract public class CheckedStateContributorImpl<T> implements Contributor<CheckedStateFactory> {\r
  28 \r
  29     abstract public CheckedState getState(ReadGraph graph, T input) throws DatabaseException;\r
  30 \r
  31     final private Class<?> clazz;\r
  32 \r
  33     @Override\r
  34     public Tester getNodeContextTester() {\r
  35         return null;\r
  36     }\r
  37 \r
  38     public CheckedStateContributorImpl() {\r
  39         clazz = ReflectionUtils.getSingleParameterType(getClass());\r
  40     }\r
  41 \r
  42     public CheckedStateContributorImpl(Class<?> clazz) {\r
  43         this.clazz = clazz;\r
  44     }\r
  45 \r
  46     @Override\r
  47     public CheckedStateFactory getFactory() {\r
  48 \r
  49         return new CheckedStateFactory() {\r
  50 \r
  51             @Override\r
  52             public CheckedState create(final PrimitiveQueryUpdater updater, NodeContext context, final CheckedStateKey key) {\r
  53 \r
  54                 CheckedStateContributionImpl contrib = new CheckedStateContributionImpl(updater, context, key) {\r
  55 \r
  56                     @SuppressWarnings("unchecked")\r
  57                                         @Override\r
  58                                         public CheckedState getState(ReadGraph graph, NodeContext context) throws DatabaseException {\r
  59                         T input = (T)context.getConstant(BuiltinKeys.INPUT);\r
  60                                                 return CheckedStateContributorImpl.this.getState(graph, input);\r
  61                                         }\r
  62 \r
  63                 };\r
  64                 \r
  65                 return contrib.getState();\r
  66 \r
  67             }\r
  68 \r
  69         };\r
  70 \r
  71     }\r
  72 \r
  73     @Override\r
  74     public Class<?> getInputClass() {\r
  75         return clazz;\r
  76     }\r
  77 \r
  78 }\r