bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/scl/scriptEditor/ReadSCLScriptDefinition.java

   1 /*******************************************************************************
   2  * Copyright (c) 2017 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  *     Semantum Oy - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.modeling.ui.scl.scriptEditor;
  13
  14 import org.simantics.databoard.Bindings;
  15 import org.simantics.db.ReadGraph;
  16 import org.simantics.db.Resource;
  17 import org.simantics.db.common.request.UnaryRead;
  18 import org.simantics.db.exception.DatabaseException;
  19 import org.simantics.layer0.Layer0;
  20 import org.simantics.utils.strings.StringUtils;
  21
  22 /**
  23  * @author Tuukka Lehtonen
  24  * @since 1.31.0
  25  */
  26 public class ReadSCLScriptDefinition extends UnaryRead<String, String> {
  27
  28     public ReadSCLScriptDefinition(String scriptURI) {
  29         super(scriptURI);
  30     }
  31
  32     @Override
  33     public String perform(ReadGraph graph) throws DatabaseException {
  34         Resource scriptResource = graph.getPossibleResource(parameter);
  35         if (scriptResource == null)
  36             return null;
  37         Layer0 L0 = Layer0.getInstance(graph);
  38         if (!graph.isInstanceOf(scriptResource, L0.SCLScript))
  39             return null;
  40         return StringUtils.safeString( graph.getPossibleRelatedValue(scriptResource, L0.SCLScript_definition, Bindings.STRING) );
  41     }
  42
  43 }