--- /dev/null
+/*******************************************************************************
+ * 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.exception.DatabaseException;
+import org.simantics.db.layer0.variable.Variable;
+
+public class PossibleVariableGUID extends VariableRead<String> {
+
+ public PossibleVariableGUID(Variable variable) {
+ super(variable);
+ }
+
+ @Override
+ public String perform(ReadGraph graph) throws DatabaseException {
+ GUID guid = variable.getPossiblePropertyValue(graph, "identifier", GUID.BINDING);
+ return guid != null ? guid.indexString() : null;
+ }
+
+}