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[simantics/platform.git] / bundles / org.simantics.db.common / src / org / simantics / db / common / request / TypeString.java
1 /*******************************************************************************\r
2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
3  * in Industry THTH ry.\r
4  * All rights reserved. This program and the accompanying materials\r
5  * are made available under the terms of the Eclipse Public License v1.0\r
6  * which accompanies this distribution, and is available at\r
7  * http://www.eclipse.org/legal/epl-v10.html\r
8  *\r
9  * Contributors:\r
10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
11  *******************************************************************************/\r
12 package org.simantics.db.common.request;\r
13 \r
14 import java.util.Set;\r
15 \r
16 import org.simantics.databoard.Bindings;\r
17 import org.simantics.db.ReadGraph;\r
18 import org.simantics.db.Resource;\r
19 import org.simantics.db.ResourceSet;\r
20 import org.simantics.db.exception.DatabaseException;\r
21 import org.simantics.layer0.Layer0;\r
22 \r
23 public class TypeString extends BinaryRead<ResourceSet, String, String> {\r
24 \r
25     final private Layer0 L0;\r
26     \r
27     public TypeString(Layer0 L0, Set<Resource> set) {\r
28         super((ResourceSet)set, " ");\r
29         this.L0 = L0;\r
30     }\r
31 \r
32 //    public TypeString(Layer0 L0, ResourceSet set, String separator) {\r
33 //        super(set, separator);\r
34 //        if (separator == null)\r
35 //            throw new NullPointerException("null separator");\r
36 //        this.L0 = L0;\r
37 //    }\r
38 \r
39     @Override\r
40     public String perform(ReadGraph graph) throws DatabaseException {\r
41 \r
42         if (parameter == null || parameter.isEmpty()) return "";\r
43 \r
44         StringBuilder result = new StringBuilder();\r
45 \r
46         boolean first = true;\r
47         for(Resource r : parameter) {\r
48             String name = graph.getPossibleRelatedValue(r, L0.HasName, Bindings.STRING);\r
49             if(!first) result.append(parameter2);\r
50             else first = false;\r
51             result.append(name);\r
52         }\r
53         \r
54         return result.toString();\r
55         \r
56     }\r
57 \r
58 }