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