-/*******************************************************************************\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 gnu.trove.list.array.TIntArrayList;\r
-\r
-import java.util.ArrayList;\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
-public class SelectByRelation extends AbstractRelation {\r
- \r
- GenericRelation base;\r
- int baseLength;\r
- String bindingPattern;\r
- int[] boundPositions;\r
- GenericRelation constraint;\r
- \r
- public SelectByRelation(GenericRelation base, String bindingPattern, GenericRelation constraint) {\r
- super();\r
- this.base = base;\r
- this.bindingPattern = bindingPattern;\r
- TIntArrayList boundPositionArray = new TIntArrayList();\r
- baseLength = bindingPattern.length();\r
- for(int i=0;i<baseLength;++i)\r
- if(bindingPattern.charAt(i) == 'b') \r
- boundPositionArray.add(i);\r
- boundPositions = boundPositionArray.toArray();\r
- this.constraint = constraint;\r
- }\r
- \r
- private Object[] map(Object[] tuple) {\r
- Object[] result = new Object[boundPositions.length];\r
- for(int i=0;i<result.length;++i)\r
- result[i] = tuple[boundPositions[i]];\r
- return result;\r
- }\r
- \r
- @Override\r
- public boolean contains(ReadGraph g, Object[] tuple) throws DatabaseException {\r
- assert tuple.length == baseLength;\r
- return base.contains(g, tuple) && constraint.contains(g, map(tuple));\r
- }\r
- @Override\r
- public Pair<String, String>[] getFields() {\r
- return base.getFields();\r
- }\r
- @Override\r
- public boolean isRealizable() {\r
- return base.isRealizable();\r
- }\r
- @Override\r
- public GenericRelation select(String bindingPattern, Object[] constants) {\r
- return new SelectByRelation(base.select(bindingPattern, constants), bindingPattern, constraint);\r
- }\r
- @Override\r
- public List<Object[]> realize(ReadGraph g) throws DatabaseException {\r
- ArrayList<Object[]> result = new ArrayList<Object[]>();\r
- for(Object[] tuple : base.realize(g))\r
- if(constraint.contains(g, map(tuple)))\r
- result.add(tuple);\r
- return result;\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 gnu.trove.list.array.TIntArrayList;
+
+import java.util.ArrayList;
+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;
+
+
+public class SelectByRelation extends AbstractRelation {
+
+ GenericRelation base;
+ int baseLength;
+ String bindingPattern;
+ int[] boundPositions;
+ GenericRelation constraint;
+
+ public SelectByRelation(GenericRelation base, String bindingPattern, GenericRelation constraint) {
+ super();
+ this.base = base;
+ this.bindingPattern = bindingPattern;
+ TIntArrayList boundPositionArray = new TIntArrayList();
+ baseLength = bindingPattern.length();
+ for(int i=0;i<baseLength;++i)
+ if(bindingPattern.charAt(i) == 'b')
+ boundPositionArray.add(i);
+ boundPositions = boundPositionArray.toArray();
+ this.constraint = constraint;
+ }
+
+ private Object[] map(Object[] tuple) {
+ Object[] result = new Object[boundPositions.length];
+ for(int i=0;i<result.length;++i)
+ result[i] = tuple[boundPositions[i]];
+ return result;
+ }
+
+ @Override
+ public boolean contains(ReadGraph g, Object[] tuple) throws DatabaseException {
+ assert tuple.length == baseLength;
+ return base.contains(g, tuple) && constraint.contains(g, map(tuple));
+ }
+ @Override
+ public Pair<String, String>[] getFields() {
+ return base.getFields();
+ }
+ @Override
+ public boolean isRealizable() {
+ return base.isRealizable();
+ }
+ @Override
+ public GenericRelation select(String bindingPattern, Object[] constants) {
+ return new SelectByRelation(base.select(bindingPattern, constants), bindingPattern, constraint);
+ }
+ @Override
+ public List<Object[]> realize(ReadGraph g) throws DatabaseException {
+ ArrayList<Object[]> result = new ArrayList<Object[]>();
+ for(Object[] tuple : base.realize(g))
+ if(constraint.contains(g, map(tuple)))
+ result.add(tuple);
+ return result;
+ }
+
+}
Code Review / simantics / platform.git / blobdiff