+/*******************************************************************************\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.util;\r
+\r
+import org.simantics.db.RelationContext;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.Statement;\r
+\r
+final public class RelationContextImpl implements RelationContext {\r
+\r
+ final private Resource subject;\r
+ final private Statement statement;\r
+\r
+ public RelationContextImpl(Resource subject, Statement statement) {\r
+ assert(subject != null);\r
+ assert(statement != null);\r
+ this.subject = subject;\r
+ this.statement = statement;\r
+ }\r
+\r
+ @Override\r
+ public int hashCode() {\r
+ return subject.hashCode() + 31 * statement.hashCode();\r
+ }\r
+ \r
+ @Override\r
+ public boolean equals(Object object) {\r
+ if (this == object)\r
+ return true;\r
+ else if (object == null)\r
+ return false;\r
+ else if (RelationContextImpl.class != object.getClass())\r
+ return false;\r
+ RelationContextImpl r = (RelationContextImpl)object;\r
+ return subject.equals(r.subject) && statement.equals(r.statement);\r
+ }\r
+\r
+ @Override\r
+ public Resource getSubject() {\r
+ return subject;\r
+ }\r
+\r
+ @Override\r
+ public Statement getStatement() {\r
+ return statement;\r
+ }\r
+\r
+}\r