-/*******************************************************************************\r
- * Copyright (c) 2010, 2011 Association for Decentralized Information Management in\r
- * Industry THTH ry.\r
- * All rights reserved. This program and the accompanying materials\r
- * are made available under the terms of the Eclipse Public License v1.0\r
- * which accompanies this distribution, and is available at\r
- * http://www.eclipse.org/legal/epl-v10.html\r
- *\r
- * Contributors:\r
- * VTT Technical Research Centre of Finland - initial API and implementation\r
- *******************************************************************************/\r
-package org.simantics.browsing.ui.model.children;\r
-\r
-import java.util.ArrayList;\r
-import java.util.Collection;\r
-import java.util.Collections;\r
-\r
-import org.simantics.browsing.ui.model.tests.Test;\r
-import org.simantics.db.ReadGraph;\r
-import org.simantics.db.Resource;\r
-import org.simantics.db.exception.DatabaseException;\r
-import org.simantics.db.exception.NoInverseException;\r
-\r
-/**\r
- * A child rule that says that there is exactly one child node whose content \r
- * is equal to the content of the parent.\r
- * @author Hannu Niemistö\r
- */\r
-public class RelationChildRule implements ChildRule {\r
-\r
- Resource relation;\r
- Test test;\r
- \r
- public RelationChildRule(Resource relation, Test test) {\r
- this.relation = relation;\r
- this.test = test;\r
- }\r
- \r
- @Override\r
- public Collection<?> getChildren(ReadGraph graph, Object parent) throws DatabaseException {\r
- Collection<Resource> result = graph.getObjects((Resource)parent, relation);\r
- if(test != null) {\r
- ArrayList<Resource> filtered = new ArrayList<Resource>(result.size());\r
- for(Resource r : result)\r
- if(test.test(graph, r))\r
- filtered.add(r); \r
- result = filtered;\r
- }\r
- return result;\r
- }\r
-\r
- @Override\r
- public Collection<?> getParents(ReadGraph graph, Object child)\r
- throws DatabaseException {\r
- try {\r
- if(child instanceof Resource) {\r
- Resource inverse = graph.getInverse(relation); \r
- return graph.getObjects((Resource)child, inverse);\r
- }\r
- } catch(NoInverseException e) {\r
- } \r
- return Collections.emptyList();\r
- }\r
- \r
- @Override\r
- public boolean isCompatible(Class<?> contentType) {\r
- return contentType.equals(Resource.class);\r
- }\r
-}\r
+/*******************************************************************************
+ * Copyright (c) 2010, 2011 Association for Decentralized Information Management in
+ * Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.browsing.ui.model.children;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+
+import org.simantics.browsing.ui.model.tests.Test;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.exception.NoInverseException;
+
+/**
+ * A child rule that says that there is exactly one child node whose content
+ * is equal to the content of the parent.
+ * @author Hannu Niemistö
+ */
+public class RelationChildRule implements ChildRule {
+
+ Resource relation;
+ Test test;
+
+ public RelationChildRule(Resource relation, Test test) {
+ this.relation = relation;
+ this.test = test;
+ }
+
+ @Override
+ public Collection<?> getChildren(ReadGraph graph, Object parent) throws DatabaseException {
+ Collection<Resource> result = graph.getObjects((Resource)parent, relation);
+ if(test != null) {
+ ArrayList<Resource> filtered = new ArrayList<Resource>(result.size());
+ for(Resource r : result)
+ if(test.test(graph, r))
+ filtered.add(r);
+ result = filtered;
+ }
+ return result;
+ }
+
+ @Override
+ public Collection<?> getParents(ReadGraph graph, Object child)
+ throws DatabaseException {
+ try {
+ if(child instanceof Resource) {
+ Resource inverse = graph.getInverse(relation);
+ return graph.getObjects((Resource)child, inverse);
+ }
+ } catch(NoInverseException e) {
+ }
+ return Collections.emptyList();
+ }
+
+ @Override
+ public boolean isCompatible(Class<?> contentType) {
+ return contentType.equals(Resource.class);
+ }
+}