-/*******************************************************************************\r
- * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
- * in 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.db.common.request;\r
-\r
-import java.util.Collection;\r
-import java.util.HashSet;\r
-\r
-import org.simantics.db.ReadGraph;\r
-import org.simantics.db.Resource;\r
-import org.simantics.db.exception.DatabaseException;\r
-import org.simantics.layer0.Layer0;\r
-\r
-public class PossibleIndexRoot extends ResourceRead<Resource> {\r
-\r
- public PossibleIndexRoot(Resource resource) {\r
- super(resource);\r
- }\r
-\r
- @Override\r
- public Resource perform(ReadGraph graph) throws DatabaseException {\r
-\r
- Layer0 L0 = Layer0.getInstance(graph);\r
- \r
- if (graph.isInstanceOf(resource, L0.IndexRoot))\r
- return resource;\r
- \r
- Collection<Resource> parents = new HashSet<Resource>(graph.getObjects(resource, L0.IsOwnedBy));\r
- Resource parent = parents.size() == 1 ? parents.iterator().next() : null;\r
-\r
- // What is this?\r
- if(resource.equals(parent))\r
- parent = null;\r
-\r
- if (parent == null) {\r
- \r
- if(parents.size() > 1) {\r
- // Maybe we have a case where there is ConsistsOf and HasProperty that is incorrectly classified as IsComposedOf\r
- parent = graph.getPossibleObject(resource, L0.PartOf);\r
- } \r
-\r
- // Assertion object?\r
- if(parent == null)\r
- parent = graph.getPossibleObject(resource, L0.HasObjectInverse);\r
- \r
- if(parent == null) return null;\r
- \r
- }\r
- \r
- return graph.syncRequest(new PossibleIndexRoot(parent));\r
-\r
- }\r
-\r
-}\r
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 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.db.common.request;
+
+import java.util.Collection;
+import java.util.HashSet;
+
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.layer0.Layer0;
+
+public class PossibleIndexRoot extends ResourceRead<Resource> {
+
+ public PossibleIndexRoot(Resource resource) {
+ super(resource);
+ }
+
+ @Override
+ public Resource perform(ReadGraph graph) throws DatabaseException {
+
+ Layer0 L0 = Layer0.getInstance(graph);
+
+ if (graph.isInstanceOf(resource, L0.IndexRoot))
+ return resource;
+
+ Collection<Resource> parents = new HashSet<Resource>(graph.getObjects(resource, L0.IsOwnedBy));
+ Resource parent = parents.size() == 1 ? parents.iterator().next() : null;
+
+ // What is this?
+ if(resource.equals(parent))
+ parent = null;
+
+ if (parent == null) {
+
+ if(parents.size() > 1) {
+ // Maybe we have a case where there is ConsistsOf and HasProperty that is incorrectly classified as IsComposedOf
+ parent = graph.getPossibleObject(resource, L0.PartOf);
+ }
+
+ // Assertion object?
+ if(parent == null)
+ parent = graph.getPossibleObject(resource, L0.HasObjectInverse);
+
+ if(parent == null) return null;
+
+ }
+
+ return graph.syncRequest(new PossibleIndexRoot(parent));
+
+ }
+
+}