Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.modeling / src / org / simantics / modeling / mapping / Tag.java

diff --git a/bundles/org.simantics.modeling/src/org/simantics/modeling/mapping/Tag.java b/bundles/org.simantics.modeling/src/org/simantics/modeling/mapping/Tag.java
new file mode 100644 (file)
index 0000000..fda1098
--- /dev/null
+++ b/bundles/org.simantics.modeling/src/org/simantics/modeling/mapping/Tag.java
@@ -0,0 +1,44 @@
+/*******************************************************************************\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.modeling.mapping;\r
+\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.WriteGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.layer0.utils.predicates.UnaryTest;\r
+\r
+public class Tag extends UnaryTest {\r
+\r
+    Resource tag;\r
+    \r
+    public Tag(Resource tag) {\r
+        this.tag = tag;\r
+    }\r
+    \r
+    @Override\r
+    public boolean has(ReadGraph g, Resource r) throws DatabaseException {\r
+        return g.hasStatement(r, tag);\r
+    }\r
+    \r
+    @Override\r
+    public void add(WriteGraph g, Resource r) throws DatabaseException {\r
+        if(!g.hasStatement(r, tag))\r
+            g.claim(r, tag, r);\r
+    }\r
+    \r
+    @Override\r
+    public void remove(WriteGraph g, Resource r) throws DatabaseException {\r
+        g.deny(r, tag);\r
+    }\r
+\r
+}\r