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.collections;
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14 import java.util.Collection;
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16 import org.simantics.db.Resource;
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17 import org.simantics.db.ReadGraph;
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18 import org.simantics.db.exception.DatabaseException;
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19 import org.simantics.layer0.utils.operations.IOperation;
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20 import org.simantics.layer0.utils.predicates.IUnaryPredicate;
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21 import org.simantics.utils.datastructures.persistent.IContextMap;
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23 public class ConditionalList implements IContextualList {
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25 IUnaryPredicate predicate;
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26 Resource thenElement;
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27 Resource elseElement;
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29 public ConditionalList(IUnaryPredicate predicate, Resource thenElement,
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30 Resource elseElement) {
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31 this.predicate = predicate;
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32 this.thenElement = thenElement;
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33 this.elseElement = elseElement;
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37 public void fill(ReadGraph g, IContextMap parameters, Collection<Resource> c) throws DatabaseException {
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38 Resource r = (Resource)parameters.get(IOperation.SUBJECT);
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40 if(predicate.has(g, r))
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41 ContextualListUtils.fill(g, thenElement, parameters, c);
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42 else if(elseElement != null)
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43 ContextualListUtils.fill(g, elseElement, parameters, c);
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