1 /*******************************************************************************
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2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.layer0.utils.property.providers;
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14 import java.util.Collection;
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15 import java.util.HashMap;
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16 import java.util.Map;
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18 import org.simantics.db.ReadGraph;
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19 import org.simantics.db.Resource;
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20 import org.simantics.db.WriteGraph;
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21 import org.simantics.db.exception.DatabaseException;
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24 public class CombinedPropertyProvider implements IPropertyProvider {
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26 private Map<Resource[], IPropertyProvider> providerMap = new HashMap<Resource[], IPropertyProvider>();
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28 public void addProvider(ReadGraph graph, IPropertyProvider provider) {
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29 for (Resource[] key : provider.provides(graph))
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30 providerMap.put(key, provider);
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34 public Object get(ReadGraph graph, final Resource resource, Resource... relations) throws DatabaseException {
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35 IPropertyProvider provider = providerMap.get(relations);
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36 if (provider == null)
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38 return provider.get(graph, resource, relations);
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42 public Collection<Resource[]> provides(ReadGraph graph) {
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43 return providerMap.keySet();
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47 public void set(WriteGraph graph, Object value, Resource resource, Resource... relations) throws DatabaseException {
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48 IPropertyProvider provider = providerMap.get(relations);
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49 if (provider == null)
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50 throw new DoesNotHaveProperty();
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51 provider.set(graph, value, resource, relations);
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