1 /*******************************************************************************
2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.layer0.utils.collections;
14 import java.util.Collection;
16 import org.simantics.db.Resource;
17 import org.simantics.db.ReadGraph;
18 import org.simantics.db.exception.DatabaseException;
19 import org.simantics.layer0.utils.operations.IOperation;
20 import org.simantics.layer0.utils.predicates.IUnaryPredicate;
21 import org.simantics.utils.datastructures.persistent.IContextMap;
23 public class ConditionalList implements IContextualList {
25 IUnaryPredicate predicate;
29 public ConditionalList(IUnaryPredicate predicate, Resource thenElement,
30 Resource elseElement) {
31 this.predicate = predicate;
32 this.thenElement = thenElement;
33 this.elseElement = elseElement;
37 public void fill(ReadGraph g, IContextMap parameters, Collection<Resource> c) throws DatabaseException {
38 Resource r = (Resource)parameters.get(IOperation.SUBJECT);
40 if(predicate.has(g, r))
41 ContextualListUtils.fill(g, thenElement, parameters, c);
42 else if(elseElement != null)
43 ContextualListUtils.fill(g, elseElement, parameters, c);