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.db.common.request;
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14 import org.simantics.databoard.Bindings;
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15 import org.simantics.databoard.type.Datatype;
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16 import org.simantics.db.ReadGraph;
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17 import org.simantics.db.Resource;
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18 import org.simantics.db.exception.DatabaseException;
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19 import org.simantics.layer0.Layer0;
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21 public class PropertyDataType extends ResourceRead2<Datatype> {
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23 public PropertyDataType(Resource resource, Resource property) {
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24 super(resource, property);
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28 public Datatype perform(ReadGraph graph) throws DatabaseException {
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29 Layer0 l0 = Layer0.getInstance(graph);
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30 Resource value = graph.getPossibleObject(resource, resource2);
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31 if(value == null) return null;
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32 return graph.getPossibleRelatedValue(value, l0.HasDataType, Bindings.getBindingUnchecked(Datatype.class));
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