bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/property/providers/CombinedPropertyProvider.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.layer0.utils.property.providers;
  13
  14 import java.util.Collection;
  15 import java.util.HashMap;
  16 import java.util.Map;
  17
  18 import org.simantics.db.ReadGraph;
  19 import org.simantics.db.Resource;
  20 import org.simantics.db.WriteGraph;
  21 import org.simantics.db.exception.DatabaseException;
  22
  23 @Deprecated
  24 public class CombinedPropertyProvider implements IPropertyProvider {
  25
  26     private Map<Resource[], IPropertyProvider> providerMap = new HashMap<Resource[], IPropertyProvider>();
  27
  28     public void addProvider(ReadGraph graph, IPropertyProvider provider) {
  29         for (Resource[] key : provider.provides(graph))
  30             providerMap.put(key, provider);
  31     }
  32
  33     @Override
  34     public Object get(ReadGraph graph, final Resource resource, Resource... relations) throws DatabaseException {
  35         IPropertyProvider provider = providerMap.get(relations);
  36         if (provider == null)
  37             return null;
  38         return provider.get(graph, resource, relations);
  39     }
  40
  41     @Override
  42     public Collection<Resource[]> provides(ReadGraph graph) {
  43         return providerMap.keySet();
  44     }
  45
  46     @Override
  47     public void set(WriteGraph graph, Object value, Resource resource, Resource... relations) throws DatabaseException {
  48         IPropertyProvider provider = providerMap.get(relations);
  49         if (provider == null)
  50             throw new DoesNotHaveProperty();
  51         provider.set(graph, value, resource, relations);
  52     }
  53
  54 }