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 java.util.Map;
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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.common.uri.UnescapedChildMapOfResource;
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19 import org.simantics.db.exception.DatabaseException;
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20 import org.simantics.db.request.ReadExt;
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21 import org.simantics.db.request.RequestFlags;
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23 final public class PossibleChild extends BinaryRead<Resource, String, Resource> implements ReadExt {
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25 public PossibleChild(Resource resource, String name) {
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26 super(resource, name);
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30 public Resource perform(ReadGraph graph) throws DatabaseException {
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31 Map<String, Resource> childMap = graph.syncRequest(new UnescapedChildMapOfResource(parameter));
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32 return childMap.get(parameter2);
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36 public String toString() {
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37 return "PossibleChild " + parameter + " " + parameter2;
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41 public boolean isImmutable(ReadGraph graph) throws DatabaseException {
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42 return graph.isImmutable(parameter);
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46 public int getType() {
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47 return RequestFlags.IMMEDIATE_UPDATE;
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