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.Set;
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16 import org.simantics.databoard.Bindings;
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17 import org.simantics.db.ReadGraph;
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18 import org.simantics.db.Resource;
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19 import org.simantics.db.ResourceSet;
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20 import org.simantics.db.exception.DatabaseException;
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21 import org.simantics.layer0.Layer0;
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23 public class TypeString extends BinaryRead<ResourceSet, String, String> {
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25 final private Layer0 L0;
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27 public TypeString(Layer0 L0, Set<Resource> set) {
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28 super((ResourceSet)set, " ");
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32 // public TypeString(Layer0 L0, ResourceSet set, String separator) {
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33 // super(set, separator);
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34 // if (separator == null)
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35 // throw new NullPointerException("null separator");
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40 public String perform(ReadGraph graph) throws DatabaseException {
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42 if (parameter == null || parameter.isEmpty()) return "";
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44 StringBuilder result = new StringBuilder();
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46 boolean first = true;
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47 for(Resource r : parameter) {
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48 String name = graph.getPossibleRelatedValue(r, L0.HasName, Bindings.STRING);
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49 if(!first) result.append(parameter2);
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51 result.append(name);
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54 return result.toString();
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