Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.db.layer0 / src / org / simantics / db / layer0 / util / RelationContextImpl.java

diff --git a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/RelationContextImpl.java b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/RelationContextImpl.java
new file mode 100644 (file)
index 0000000..558365e
--- /dev/null
+++ b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/RelationContextImpl.java
@@ -0,0 +1,57 @@
+/*******************************************************************************\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