-/*******************************************************************************\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.layer0.utils.binaryPredicates;\r
-\r
-import java.util.Collection;\r
-import java.util.HashSet;\r
-import java.util.Set;\r
-\r
-import org.simantics.db.Resource;\r
-import org.simantics.db.ReadGraph;\r
-import org.simantics.db.WriteGraph;\r
-import org.simantics.db.exception.DatabaseException;\r
-import org.simantics.utils.datastructures.Pair;\r
-\r
-public class CompositePredicate extends BinaryPredicate {\r
- IBinaryPredicate first;\r
- IBinaryPredicate second;\r
- \r
- int hasStatementDirection;\r
- int getStatementsDirection;\r
- \r
- public CompositePredicate(IBinaryPredicate first, IBinaryPredicate second) {\r
- this.first = first;\r
- this.second = second; \r
- if(first.supportsGetStatements() && second.supportsGetObjects())\r
- getStatementsDirection = 1;\r
- else if(second.supportsGetStatements() && first.supportsGetSubjects())\r
- getStatementsDirection = 2;\r
- else\r
- this.getStatementsDirection = 0;\r
- if(first.supportsGetObjects())\r
- hasStatementDirection = 1;\r
- else if(second.supportsGetSubjects())\r
- hasStatementDirection = 2;\r
- else\r
- throw new IllegalArgumentException("Cannot compose binary predicates such that the first one does not support getObjects and the second one does not support getSubjects.");\r
- }\r
-\r
- @Override\r
- public Collection<Resource> getObjects(ReadGraph g, Resource subject) throws DatabaseException {\r
- Set<Resource> result = new HashSet<Resource>();\r
- for(Resource r : first.getObjects(g, subject))\r
- result.addAll(second.getObjects(g, r));\r
- return result;\r
- }\r
-\r
- @Override\r
- public Collection<Pair<Resource, Resource>> getStatements(ReadGraph g) throws DatabaseException {\r
- Set<Pair<Resource, Resource>> result = \r
- new HashSet<Pair<Resource, Resource>>();\r
- if(getStatementsDirection == 1)\r
- for(Pair<Resource, Resource> p : first.getStatements(g))\r
- for(Resource r : second.getObjects(g, p.second))\r
- result.add(new Pair<Resource, Resource>(p.first, r));\r
- else if(getStatementsDirection == 2)\r
- for(Pair<Resource, Resource> p : second.getStatements(g))\r
- for(Resource r : second.getSubjects(g, p.first))\r
- result.add(new Pair<Resource, Resource>(r, p.second));\r
- else\r
- throw new UnsupportedOperationException();\r
- return result;\r
- }\r
-\r
- @Override\r
- public Collection<Resource> getSubjects(ReadGraph g, Resource object) throws DatabaseException {\r
- Set<Resource> result = new HashSet<Resource>();\r
- for(Resource r : second.getSubjects(g, object))\r
- result.addAll(first.getSubjects(g, r));\r
- return result;\r
- }\r
-\r
- @Override\r
- public boolean has(ReadGraph g, Resource subject, Resource object) throws DatabaseException {\r
- if(hasStatementDirection == 1) {\r
- for(Resource r : first.getObjects(g, subject))\r
- if(second.has(g, r, object))\r
- return true;\r
- }\r
- else {\r
- for(Resource r : second.getSubjects(g, object))\r
- if(second.has(g, subject, r))\r
- return true;\r
- }\r
- return false;\r
- }\r
-\r
- @Override\r
- public void add(WriteGraph g, Resource subject, Resource object) {\r
- throw new UnsupportedOperationException();\r
- }\r
-\r
- @Override\r
- public void remove(WriteGraph g, Resource subject, Resource object) {\r
- throw new UnsupportedOperationException();\r
- }\r
-\r
- @Override\r
- public boolean supportsAdditions() {\r
- return false;\r
- }\r
-\r
- @Override\r
- public boolean supportsGetObjects() {\r
- return first.supportsGetObjects() && second.supportsGetObjects();\r
- }\r
-\r
- @Override\r
- public boolean supportsGetStatements() {\r
- return getStatementsDirection != 0;\r
- }\r
-\r
- @Override\r
- public boolean supportsGetSubjects() {\r
- return first.supportsGetSubjects() && second.supportsGetSubjects();\r
- }\r
-\r
- @Override\r
- public boolean supportsRemovals() { \r
- return false;\r
- }\r
-\r
- @Override\r
- public int hashCode() {\r
- final int prime = 31;\r
- int result = 1;\r
- result = prime * result + ((first == null) ? 0 : first.hashCode());\r
- result = prime * result + ((second == null) ? 0 : second.hashCode());\r
- return result;\r
- }\r
-\r
- @Override\r
- public boolean equals(Object obj) {\r
- if (this == obj)\r
- return true;\r
- if (obj == null)\r
- return false;\r
- if (getClass() != obj.getClass())\r
- return false;\r
- CompositePredicate other = (CompositePredicate) obj;\r
- if (first == null) {\r
- if (other.first != null)\r
- return false;\r
- } else if (!first.equals(other.first))\r
- return false;\r
- if (second == null) {\r
- if (other.second != null)\r
- return false;\r
- } else if (!second.equals(other.second))\r
- return false;\r
- return true;\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.layer0.utils.binaryPredicates;
+
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Set;
+
+import org.simantics.db.Resource;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.WriteGraph;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.utils.datastructures.Pair;
+
+public class CompositePredicate extends BinaryPredicate {
+ IBinaryPredicate first;
+ IBinaryPredicate second;
+
+ int hasStatementDirection;
+ int getStatementsDirection;
+
+ public CompositePredicate(IBinaryPredicate first, IBinaryPredicate second) {
+ this.first = first;
+ this.second = second;
+ if(first.supportsGetStatements() && second.supportsGetObjects())
+ getStatementsDirection = 1;
+ else if(second.supportsGetStatements() && first.supportsGetSubjects())
+ getStatementsDirection = 2;
+ else
+ this.getStatementsDirection = 0;
+ if(first.supportsGetObjects())
+ hasStatementDirection = 1;
+ else if(second.supportsGetSubjects())
+ hasStatementDirection = 2;
+ else
+ throw new IllegalArgumentException("Cannot compose binary predicates such that the first one does not support getObjects and the second one does not support getSubjects.");
+ }
+
+ @Override
+ public Collection<Resource> getObjects(ReadGraph g, Resource subject) throws DatabaseException {
+ Set<Resource> result = new HashSet<Resource>();
+ for(Resource r : first.getObjects(g, subject))
+ result.addAll(second.getObjects(g, r));
+ return result;
+ }
+
+ @Override
+ public Collection<Pair<Resource, Resource>> getStatements(ReadGraph g) throws DatabaseException {
+ Set<Pair<Resource, Resource>> result =
+ new HashSet<Pair<Resource, Resource>>();
+ if(getStatementsDirection == 1)
+ for(Pair<Resource, Resource> p : first.getStatements(g))
+ for(Resource r : second.getObjects(g, p.second))
+ result.add(new Pair<Resource, Resource>(p.first, r));
+ else if(getStatementsDirection == 2)
+ for(Pair<Resource, Resource> p : second.getStatements(g))
+ for(Resource r : second.getSubjects(g, p.first))
+ result.add(new Pair<Resource, Resource>(r, p.second));
+ else
+ throw new UnsupportedOperationException();
+ return result;
+ }
+
+ @Override
+ public Collection<Resource> getSubjects(ReadGraph g, Resource object) throws DatabaseException {
+ Set<Resource> result = new HashSet<Resource>();
+ for(Resource r : second.getSubjects(g, object))
+ result.addAll(first.getSubjects(g, r));
+ return result;
+ }
+
+ @Override
+ public boolean has(ReadGraph g, Resource subject, Resource object) throws DatabaseException {
+ if(hasStatementDirection == 1) {
+ for(Resource r : first.getObjects(g, subject))
+ if(second.has(g, r, object))
+ return true;
+ }
+ else {
+ for(Resource r : second.getSubjects(g, object))
+ if(second.has(g, subject, r))
+ return true;
+ }
+ return false;
+ }
+
+ @Override
+ public void add(WriteGraph g, Resource subject, Resource object) {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public void remove(WriteGraph g, Resource subject, Resource object) {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public boolean supportsAdditions() {
+ return false;
+ }
+
+ @Override
+ public boolean supportsGetObjects() {
+ return first.supportsGetObjects() && second.supportsGetObjects();
+ }
+
+ @Override
+ public boolean supportsGetStatements() {
+ return getStatementsDirection != 0;
+ }
+
+ @Override
+ public boolean supportsGetSubjects() {
+ return first.supportsGetSubjects() && second.supportsGetSubjects();
+ }
+
+ @Override
+ public boolean supportsRemovals() {
+ return false;
+ }
+
+ @Override
+ public int hashCode() {
+ final int prime = 31;
+ int result = 1;
+ result = prime * result + ((first == null) ? 0 : first.hashCode());
+ result = prime * result + ((second == null) ? 0 : second.hashCode());
+ return result;
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj)
+ return true;
+ if (obj == null)
+ return false;
+ if (getClass() != obj.getClass())
+ return false;
+ CompositePredicate other = (CompositePredicate) obj;
+ if (first == null) {
+ if (other.first != null)
+ return false;
+ } else if (!first.equals(other.first))
+ return false;
+ if (second == null) {
+ if (other.second != null)
+ return false;
+ } else if (!second.equals(other.second))
+ return false;
+ return true;
+ }
+
+}
Code Review / simantics / platform.git / blobdiff