Added resourceId and GUID to diagram DnD content

[simantics/platform.git] / bundles / org.simantics.db.layer0 / src / org / simantics / db / layer0 / request / PossibleGUID.java

diff --git a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/request/PossibleGUID.java b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/request/PossibleGUID.java
new file mode 100644 (file)
index 0000000..c06f719
--- /dev/null
+++ b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/request/PossibleGUID.java
@@ -0,0 +1,34 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2018 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.request;
+
+import org.simantics.datatypes.literal.GUID;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.common.request.ResourceRead;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.layer0.Layer0;
+
+public class PossibleGUID extends ResourceRead<String> {
+
+    public PossibleGUID(Resource resource) {
+        super(resource);
+    }
+
+    @Override
+    public String perform(ReadGraph graph) throws DatabaseException {
+        Layer0 L0 = Layer0.getInstance(graph);
+        GUID guid = graph.getPossibleRelatedValue(resource, L0.identifier, GUID.BINDING);
+        return guid != null ? guid.indexString() : null;
+    }
+
+}