-/*******************************************************************************\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.layer0.genericrelation.combinators;\r
-\r
-import java.util.ArrayList;\r
-import java.util.Collection;\r
-import java.util.List;\r
-\r
-import org.simantics.db.ReadGraph;\r
-import org.simantics.db.exception.DatabaseException;\r
-import org.simantics.db.layer0.adapter.GenericRelation;\r
-import org.simantics.db.layer0.genericrelation.AbstractRelation;\r
-import org.simantics.utils.datastructures.Pair;\r
-\r
-/**\r
- * Takes the union of multiple relations. Does not remove duplicates.\r
- */\r
-public class Union extends AbstractRelation {\r
-\r
- Collection<GenericRelation> relations;\r
- \r
- public Union(Collection<GenericRelation> relations) {\r
- this.relations = relations;\r
- }\r
-\r
- @Override\r
- public boolean contains(ReadGraph g, Object[] tuple) throws DatabaseException {\r
- for(GenericRelation relation : relations)\r
- if(relation.contains(g, tuple))\r
- return true;\r
- return false;\r
- }\r
-\r
- @Override\r
- public boolean isRealizable() {\r
- for(GenericRelation relation : relations)\r
- if(!relation.isRealizable())\r
- return false;\r
- return true;\r
- }\r
-\r
- @Override\r
- public List<Object[]> realize(ReadGraph g) throws DatabaseException {\r
- ArrayList<List<Object[]>> results = new ArrayList<List<Object[]>>(relations.size()); \r
- for(GenericRelation relation : relations)\r
- results.add(relation.realize(g));\r
- int size = 0;\r
- for(List<Object[]> part : results)\r
- size += part.size();\r
- ArrayList<Object[]> result = new ArrayList<Object[]>(size);\r
- for(List<Object[]> part : results)\r
- result.addAll(part);\r
- return result;\r
- }\r
- \r
- @Override\r
- public GenericRelation selectByRelation(String bindingPattern, GenericRelation constraint) {\r
- ArrayList<GenericRelation> semijoinRelations = new ArrayList<GenericRelation>(relations.size()); \r
- for(GenericRelation relation : relations)\r
- semijoinRelations.add(relation.selectByRelation(bindingPattern, constraint));\r
- return new Union(semijoinRelations);\r
- }\r
- \r
- @Override\r
- public GenericRelation select(String bindingPattern, Object[] constants) {\r
- ArrayList<GenericRelation> selectedRelations = new ArrayList<GenericRelation>(relations.size()); \r
- for(GenericRelation relation : relations)\r
- selectedRelations.add(relation.select(bindingPattern, constants));\r
- return new Union(selectedRelations);\r
- }\r
-\r
- @Override\r
- public Pair<String, String>[] getFields() {\r
- for(GenericRelation relation : relations)\r
- return relation.getFields();\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.db.layer0.genericrelation.combinators;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+import org.simantics.db.ReadGraph;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.layer0.adapter.GenericRelation;
+import org.simantics.db.layer0.genericrelation.AbstractRelation;
+import org.simantics.utils.datastructures.Pair;
+
+/**
+ * Takes the union of multiple relations. Does not remove duplicates.
+ */
+public class Union extends AbstractRelation {
+
+ Collection<GenericRelation> relations;
+
+ public Union(Collection<GenericRelation> relations) {
+ this.relations = relations;
+ }
+
+ @Override
+ public boolean contains(ReadGraph g, Object[] tuple) throws DatabaseException {
+ for(GenericRelation relation : relations)
+ if(relation.contains(g, tuple))
+ return true;
+ return false;
+ }
+
+ @Override
+ public boolean isRealizable() {
+ for(GenericRelation relation : relations)
+ if(!relation.isRealizable())
+ return false;
+ return true;
+ }
+
+ @Override
+ public List<Object[]> realize(ReadGraph g) throws DatabaseException {
+ ArrayList<List<Object[]>> results = new ArrayList<List<Object[]>>(relations.size());
+ for(GenericRelation relation : relations)
+ results.add(relation.realize(g));
+ int size = 0;
+ for(List<Object[]> part : results)
+ size += part.size();
+ ArrayList<Object[]> result = new ArrayList<Object[]>(size);
+ for(List<Object[]> part : results)
+ result.addAll(part);
+ return result;
+ }
+
+ @Override
+ public GenericRelation selectByRelation(String bindingPattern, GenericRelation constraint) {
+ ArrayList<GenericRelation> semijoinRelations = new ArrayList<GenericRelation>(relations.size());
+ for(GenericRelation relation : relations)
+ semijoinRelations.add(relation.selectByRelation(bindingPattern, constraint));
+ return new Union(semijoinRelations);
+ }
+
+ @Override
+ public GenericRelation select(String bindingPattern, Object[] constants) {
+ ArrayList<GenericRelation> selectedRelations = new ArrayList<GenericRelation>(relations.size());
+ for(GenericRelation relation : relations)
+ selectedRelations.add(relation.select(bindingPattern, constants));
+ return new Union(selectedRelations);
+ }
+
+ @Override
+ public Pair<String, String>[] getFields() {
+ for(GenericRelation relation : relations)
+ return relation.getFields();
+ return null;
+ }
+
+}
Code Review / simantics / platform.git / blobdiff