bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/processors/DefaultSelectedViewpointFactoryProcessor.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.common.processors;
  13
  14 import java.util.Collection;
  15
  16 import org.simantics.browsing.ui.BuiltinKeys;
  17 import org.simantics.browsing.ui.NodeContext;
  18 import org.simantics.browsing.ui.PrimitiveQueryUpdater;
  19 import org.simantics.browsing.ui.BuiltinKeys.SelectedViewpointFactoryKey;
  20 import org.simantics.browsing.ui.NodeContext.PrimitiveQueryKey;
  21 import org.simantics.browsing.ui.content.ViewpointFactory;
  22
  23 public class DefaultSelectedViewpointFactoryProcessor extends AbstractPrimitiveQueryProcessor<ViewpointFactory> {
  24
  25     @Override
  26     public Object getIdentifier() {
  27         return BuiltinKeys.SelectedViewpointFactoryKey.class;
  28     }
  29
  30     @Override
  31     public String toString() {
  32         return "SelectedViewpointFactoryProcessor";
  33     }
  34
  35     @Override
  36     public ViewpointFactory query(PrimitiveQueryUpdater updater, NodeContext context,
  37             PrimitiveQueryKey<ViewpointFactory> key) {
  38         SelectedViewpointFactoryKey k = (SelectedViewpointFactoryKey) key;
  39         Collection<ViewpointFactory> factories = k.getParameter(0);
  40         if (factories.isEmpty())
  41             return null;
  42
  43         return factories.iterator().next();
  44     }
  45
  46 }