bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/contributor/labeler/CheckedStateContributorImpl.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in 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.graph.impl.contributor.labeler;
  13
  14 import org.simantics.browsing.ui.BuiltinKeys;
  15 import org.simantics.browsing.ui.CheckedState;
  16 import org.simantics.browsing.ui.NodeContext;
  17 import org.simantics.browsing.ui.PrimitiveQueryUpdater;
  18 import org.simantics.browsing.ui.Tester;
  19 import org.simantics.browsing.ui.BuiltinKeys.CheckedStateKey;
  20 import org.simantics.browsing.ui.content.CheckedStateFactory;
  21 import org.simantics.browsing.ui.content.Contributor;
  22 import org.simantics.browsing.ui.graph.impl.contribution.CheckedStateContributionImpl;
  23 import org.simantics.db.ReadGraph;
  24 import org.simantics.db.exception.DatabaseException;
  25 import org.simantics.utils.ReflectionUtils;
  26
  27 abstract public class CheckedStateContributorImpl<T> implements Contributor<CheckedStateFactory> {
  28
  29     abstract public CheckedState getState(ReadGraph graph, T input) throws DatabaseException;
  30
  31     final private Class<?> clazz;
  32
  33     @Override
  34     public Tester getNodeContextTester() {
  35         return null;
  36     }
  37
  38     public CheckedStateContributorImpl() {
  39         clazz = ReflectionUtils.getSingleParameterType(getClass());
  40     }
  41
  42     public CheckedStateContributorImpl(Class<?> clazz) {
  43         this.clazz = clazz;
  44     }
  45
  46     @Override
  47     public CheckedStateFactory getFactory() {
  48
  49         return new CheckedStateFactory() {
  50
  51             @Override
  52             public CheckedState create(final PrimitiveQueryUpdater updater, NodeContext context, final CheckedStateKey key) {
  53
  54                 CheckedStateContributionImpl contrib = new CheckedStateContributionImpl(updater, context, key) {
  55
  56                     @SuppressWarnings("unchecked")
  57                                         @Override
  58                                         public CheckedState getState(ReadGraph graph, NodeContext context) throws DatabaseException {
  59                         T input = (T)context.getConstant(BuiltinKeys.INPUT);
  60                                                 return CheckedStateContributorImpl.this.getState(graph, input);
  61                                         }
  62
  63                 };
  64
  65                 return contrib.getState();
  66
  67             }
  68
  69         };
  70
  71     }
  72
  73     @Override
  74     public Class<?> getInputClass() {
  75         return clazz;
  76     }
  77
  78 }