-/*******************************************************************************\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 org.simantics.db.AsyncReadGraph;\r
-import org.simantics.db.Resource;\r
-import org.simantics.db.procedure.AsyncProcedure;\r
-import org.simantics.layer0.Layer0;\r
-\r
-public class PossibleTypedParent extends ResourceAsyncRead2<Resource> {\r
-\r
- public PossibleTypedParent(Resource resource, Resource type) {\r
- super(resource, type);\r
- }\r
-\r
- @Override\r
- public void perform(AsyncReadGraph graph, final AsyncProcedure<Resource> procedure) {\r
-\r
- final Layer0 l0 = graph.getService(Layer0.class);\r
-\r
- graph.forIsInstanceOf(resource, resource2, new AsyncProcedure<Boolean>() {\r
-\r
- @Override\r
- public void execute(AsyncReadGraph graph, Boolean isInstance) {\r
- if(isInstance) {\r
- procedure.execute(graph, resource);\r
- } else {\r
- \r
- graph.forPossibleObject(resource, l0.PartOf, new AsyncProcedure<Resource>() {\r
-\r
- @Override\r
- public void execute(AsyncReadGraph graph, final Resource parent) {\r
-\r
- if(parent == null) {\r
- procedure.execute(graph, null);\r
- } else {\r
- graph.asyncRequest(new PossibleTypedParent(parent, resource2), procedure);\r
- }\r
- \r
- }\r
-\r
- @Override\r
- public void exception(AsyncReadGraph graph, Throwable throwable) {\r
- procedure.exception(graph, throwable);\r
- }\r
- \r
- });\r
- \r
- }\r
- }\r
-\r
- @Override\r
- public void exception(AsyncReadGraph graph, Throwable throwable) {\r
- procedure.exception(graph, throwable);\r
- }\r
- });\r
- \r
- \r
- }\r
-\r
-}\r
+/*******************************************************************************
+ * Copyright (c) 2007, 2018 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 org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.layer0.Layer0;
+
+public class PossibleTypedParent extends ResourceRead2<Resource> {
+
+ public PossibleTypedParent(Resource resource, Resource type) {
+ super(resource, type);
+ }
+
+ @Override
+ public Resource perform(ReadGraph graph) throws DatabaseException {
+ if (graph.isInstanceOf(resource, resource2)) {
+ return resource;
+ } else {
+ Layer0 L0 = Layer0.getInstance(graph);
+ Resource possibleParent = graph.getPossibleObject(resource, L0.PartOf);
+ if (possibleParent != null) {
+ return graph.syncRequest(new PossibleTypedParent(possibleParent, resource2));
+ } else {
+ return null;
+ }
+ }
+ }
+
+}