bundles/org.simantics.project/src/org/simantics/project/internal/SafeName.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.project.internal;
  13
  14 import org.simantics.db.ReadGraph;
  15 import org.simantics.db.Resource;
  16 import org.simantics.db.common.request.ResourceRead;
  17 import org.simantics.db.exception.DatabaseException;
  18 import org.simantics.layer0.Layer0;
  19
  20 /**
  21  * @author Tuukka Lehtonen
  22  */
  23 public class SafeName extends ResourceRead<String> {
  24
  25     public SafeName(Resource r) {
  26         super(r);
  27     }
  28
  29     @Override
  30     public String perform(ReadGraph graph) throws DatabaseException {
  31         String name = graph.getPossibleRelatedValue(resource, Layer0.getInstance(graph).HasName);
  32         if (name == null)
  33             name = "(no name)";
  34         return name;
  35     }
  36
  37 }