Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.browsing.ui.graph.impl / src / org / simantics / browsing / ui / graph / impl / request / GetLabel.java

diff --git a/bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/request/GetLabel.java b/bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/request/GetLabel.java
new file mode 100644 (file)
index 0000000..7cdb601
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/request/GetLabel.java
@@ -0,0 +1,45 @@
+/*******************************************************************************\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.browsing.ui.graph.impl.request;\r
+\r
+import org.simantics.databoard.Bindings;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.common.request.ResourceRead;\r
+import org.simantics.db.common.utils.NameUtils;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.exception.ValidationException;\r
+import org.simantics.layer0.Layer0;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class GetLabel extends ResourceRead<String> {\r
+\r
+    public GetLabel(Resource r) {\r
+        super(r);\r
+    }\r
+\r
+    @Override\r
+    public String perform(ReadGraph graph) throws DatabaseException {\r
+        Layer0 l0 = Layer0.getInstance(graph);\r
+        String label = graph.getPossibleRelatedValue(resource, l0.HasLabel, Bindings.STRING);\r
+        if (label == null)\r
+            label = graph.getPossibleRelatedValue(resource, l0.HasName, Bindings.STRING);\r
+        if (label == null) {\r
+            String rep = NameUtils.getSafeName(graph, resource);\r
+            throw new ValidationException("Resource '" + rep + "' does not have a Label or a Name property.");\r
+        }\r
+        return label;\r
+    }\r
+\r
+}\r