-/*******************************************************************************\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.browsing.ui.graph.impl;\r
-\r
-import java.util.Collection;\r
-import java.util.Collections;\r
-\r
-import org.eclipse.core.runtime.IAdaptable;\r
-import org.simantics.browsing.ui.BuiltinKeys;\r
-import org.simantics.browsing.ui.NodeContext;\r
-import org.simantics.browsing.ui.NodeContext.PrimitiveQueryKey;\r
-import org.simantics.browsing.ui.graph.impl.CommonKeys.RelatedObjectsKey;\r
-import org.simantics.db.ReadGraph;\r
-import org.simantics.db.Resource;\r
-import org.simantics.db.exception.DatabaseException;\r
-import org.simantics.utils.Container;\r
-\r
-/**\r
- * @author Tuukka Lehtonen\r
- */\r
-public class RelatedObjectsQueryProcessor extends LazyGraphQueryProcessor<Collection<Resource>> {\r
-\r
- @Override\r
- public String toString() {\r
- return "RelatedObjectsProcessor";\r
- }\r
-\r
- @Override\r
- public Object getIdentifier() {\r
- return CommonKeys.RelatedObjectsKey.class;\r
- }\r
-\r
- @Override\r
- protected Collection<Resource> initial() {\r
- return Collections.emptySet();\r
- }\r
-\r
- @Override\r
- protected Collection<Resource> compute(ReadGraph graph, NodeContext context, PrimitiveQueryKey<Container<Collection<Resource>>> key) throws DatabaseException {\r
- Object input = context.getConstant(BuiltinKeys.INPUT);\r
- Resource subject = adaptToSingle(input, Resource.class);\r
-\r
- RelatedObjectsKey k = (RelatedObjectsKey) key;\r
- final Resource relation = k.getParameter(0);\r
- if (relation == null)\r
- return Collections.emptyList();\r
-\r
- return graph.getObjects(subject, relation);\r
- }\r
-\r
- @SuppressWarnings("unchecked")\r
- public static <T> T adaptToSingle(Object o, Class<T> clazz) {\r
- if (clazz.isInstance(o)) {\r
- return (T) o;\r
- } else if (o instanceof IAdaptable) {\r
- IAdaptable a = (IAdaptable) o;\r
- return (T) a.getAdapter(clazz);\r
- } else if (o instanceof Container<?>) {\r
- Object obj = ((Container<?>) o).get();\r
- if (obj == o)\r
- return null;\r
- return adaptToSingle(obj, clazz);\r
- }\r
- return null;\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.browsing.ui.graph.impl;
+
+import java.util.Collection;
+import java.util.Collections;
+
+import org.eclipse.core.runtime.IAdaptable;
+import org.simantics.browsing.ui.BuiltinKeys;
+import org.simantics.browsing.ui.NodeContext;
+import org.simantics.browsing.ui.NodeContext.PrimitiveQueryKey;
+import org.simantics.browsing.ui.graph.impl.CommonKeys.RelatedObjectsKey;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.utils.Container;
+
+/**
+ * @author Tuukka Lehtonen
+ */
+public class RelatedObjectsQueryProcessor extends LazyGraphQueryProcessor<Collection<Resource>> {
+
+ @Override
+ public String toString() {
+ return "RelatedObjectsProcessor";
+ }
+
+ @Override
+ public Object getIdentifier() {
+ return CommonKeys.RelatedObjectsKey.class;
+ }
+
+ @Override
+ protected Collection<Resource> initial() {
+ return Collections.emptySet();
+ }
+
+ @Override
+ protected Collection<Resource> compute(ReadGraph graph, NodeContext context, PrimitiveQueryKey<Container<Collection<Resource>>> key) throws DatabaseException {
+ Object input = context.getConstant(BuiltinKeys.INPUT);
+ Resource subject = adaptToSingle(input, Resource.class);
+
+ RelatedObjectsKey k = (RelatedObjectsKey) key;
+ final Resource relation = k.getParameter(0);
+ if (relation == null)
+ return Collections.emptyList();
+
+ return graph.getObjects(subject, relation);
+ }
+
+ @SuppressWarnings("unchecked")
+ public static <T> T adaptToSingle(Object o, Class<T> clazz) {
+ if (clazz.isInstance(o)) {
+ return (T) o;
+ } else if (o instanceof IAdaptable) {
+ IAdaptable a = (IAdaptable) o;
+ return (T) a.getAdapter(clazz);
+ } else if (o instanceof Container<?>) {
+ Object obj = ((Container<?>) o).get();
+ if (obj == o)
+ return null;
+ return adaptToSingle(obj, clazz);
+ }
+ return null;
+ }
+
+}