-/*******************************************************************************\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.mapping.constraint.instructions;\r
-\r
-import gnu.trove.set.hash.TIntHashSet;\r
-\r
-import java.util.ArrayList;\r
-import java.util.Collection;\r
-import java.util.Iterator;\r
-\r
-import org.simantics.db.ReadGraph;\r
-import org.simantics.db.Resource;\r
-import org.simantics.db.Statement;\r
-import org.simantics.db.exception.DatabaseException;\r
-import org.simantics.layer0.Layer0;\r
-\r
-public class TripletPredicateQuery extends TripletInstruction {\r
-\r
- Resource predicate;\r
- \r
- public TripletPredicateQuery(int variable0, int variable1, int variable2,\r
- Resource predicate) {\r
- super(variable0, variable1, variable2);\r
- this.predicate = predicate;\r
- }\r
- \r
- public TripletPredicateQuery(int variable0, int variable1, int variable2) {\r
- super(variable0, variable1, variable2); \r
- }\r
- \r
- @Override\r
- public Object query(ReadGraph g, Object[] bindings) throws DatabaseException {\r
- Resource r0 = (Resource)bindings[variable0];\r
- Resource r2 = (Resource)bindings[variable2];\r
- Collection<Resource> result = new ArrayList<Resource>();\r
- for(Statement stat : \r
- predicate == null ? \r
- g.getStatements(r0, Layer0.getInstance(g).IsWeaklyRelatedTo) : \r
- g.getStatements(r0, predicate))\r
- if(stat.getObject().equals(r2))\r
- result.add(stat.getPredicate());\r
- if(result.isEmpty())\r
- return IInstruction.FAILURE;\r
- Iterator<Resource> it = result.iterator();\r
- bindings[variable1] = it.next();\r
- if(it.hasNext())\r
- return it;\r
- else\r
- return null;\r
- }\r
- \r
- @SuppressWarnings("unchecked")\r
- @Override\r
- public Object next(ReadGraph g, Object[] bindings, Object continuation) {\r
- Iterator<Resource> it = (Iterator<Resource>)continuation;\r
- if(it.hasNext()) {\r
- bindings[variable1] = it.next();\r
- if(it.hasNext())\r
- return it;\r
- else\r
- return null;\r
- }\r
- else\r
- return IInstruction.FAILURE;\r
- } \r
- \r
- @Override\r
- public void collectVariables(TIntHashSet reads, TIntHashSet writes) { \r
- super.collectVariables(reads, writes);\r
- writes.add(variable1);\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.mapping.constraint.instructions;
+
+import gnu.trove.set.hash.TIntHashSet;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Iterator;
+
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.Statement;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.layer0.Layer0;
+
+public class TripletPredicateQuery extends TripletInstruction {
+
+ Resource predicate;
+
+ public TripletPredicateQuery(int variable0, int variable1, int variable2,
+ Resource predicate) {
+ super(variable0, variable1, variable2);
+ this.predicate = predicate;
+ }
+
+ public TripletPredicateQuery(int variable0, int variable1, int variable2) {
+ super(variable0, variable1, variable2);
+ }
+
+ @Override
+ public Object query(ReadGraph g, Object[] bindings) throws DatabaseException {
+ Resource r0 = (Resource)bindings[variable0];
+ Resource r2 = (Resource)bindings[variable2];
+ Collection<Resource> result = new ArrayList<Resource>();
+ for(Statement stat :
+ predicate == null ?
+ g.getStatements(r0, Layer0.getInstance(g).IsWeaklyRelatedTo) :
+ g.getStatements(r0, predicate))
+ if(stat.getObject().equals(r2))
+ result.add(stat.getPredicate());
+ if(result.isEmpty())
+ return IInstruction.FAILURE;
+ Iterator<Resource> it = result.iterator();
+ bindings[variable1] = it.next();
+ if(it.hasNext())
+ return it;
+ else
+ return null;
+ }
+
+ @SuppressWarnings("unchecked")
+ @Override
+ public Object next(ReadGraph g, Object[] bindings, Object continuation) {
+ Iterator<Resource> it = (Iterator<Resource>)continuation;
+ if(it.hasNext()) {
+ bindings[variable1] = it.next();
+ if(it.hasNext())
+ return it;
+ else
+ return null;
+ }
+ else
+ return IInstruction.FAILURE;
+ }
+
+ @Override
+ public void collectVariables(TIntHashSet reads, TIntHashSet writes) {
+ super.collectVariables(reads, writes);
+ writes.add(variable1);
+ }
+
+}
Code Review / simantics / platform.git / blobdiff