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[simantics/platform.git] / bundles / org.simantics.browsing.ui.model / src / org / simantics / browsing / ui / model / children / ConstantChildRule.java
1 /*******************************************************************************\r
2  * Copyright (c) 2010, 2011 Association for Decentralized Information Management in\r
3  * 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.browsing.ui.model.children;\r
13 \r
14 import java.util.Collection;\r
15 import java.util.Collections;\r
16 \r
17 import org.simantics.db.ReadGraph;\r
18 import org.simantics.db.Resource;\r
19 import org.simantics.db.exception.DatabaseException;\r
20 \r
21 public class ConstantChildRule implements ChildRule {\r
22     Collection<Resource> children;\r
23     \r
24     public ConstantChildRule(Collection<Resource> children) {\r
25         this.children = children;\r
26     }\r
27     \r
28     @Override\r
29     public Collection<?> getChildren(ReadGraph graph, Object parent) throws DatabaseException {\r
30        return children;\r
31     }\r
32     \r
33     @Override\r
34     public Collection<?> getParents(ReadGraph graph, Object child) throws DatabaseException {\r
35         return Collections.emptyList();        \r
36     }\r
37 \r
38     @Override\r
39     public boolean isCompatible(Class<?> contentType) {\r
40         return true;\r
41     }\r
42 }\r