bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/L0StringModifier.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.browsing.ui.graph.impl;
  13
  14 import org.simantics.browsing.ui.common.ErrorLogger;
  15 import org.simantics.browsing.ui.content.Labeler.Modifier;
  16 import org.simantics.db.ReadGraph;
  17 import org.simantics.db.RequestProcessor;
  18 import org.simantics.db.Resource;
  19 import org.simantics.db.WriteGraph;
  20 import org.simantics.db.common.primitiverequest.PossibleAdapter;
  21 import org.simantics.db.common.request.WriteRequest;
  22 import org.simantics.db.exception.DatabaseException;
  23 import org.simantics.db.layer0.adapter.StringModifier;
  24 import org.simantics.db.request.Read;
  25
  26 public class L0StringModifier implements Modifier {
  27
  28         final private RequestProcessor processor;
  29         final private Resource resource;
  30
  31         public L0StringModifier(RequestProcessor processor, Resource resource) {
  32                 this.processor = processor;
  33                 this.resource = resource;
  34         }
  35
  36         @Override
  37         public String getValue() {
  38                 try {
  39                         return processor.syncRequest(new PossibleAdapter<String>(resource, String.class));
  40                 } catch (DatabaseException e) {
  41                         ErrorLogger.defaultLogError(e);
  42                         return null;
  43                 }
  44         }
  45
  46         @Override
  47         public String isValid(final String label) {
  48                 try {
  49                         return processor.syncRequest(new Read<String>() {
  50                                 @Override
  51                                 public String perform(ReadGraph graph) throws DatabaseException {
  52                                         StringModifier modifier = graph.adapt(resource, StringModifier.class);
  53                                         return modifier.isValid(label);
  54                                 }
  55                         });
  56                 } catch (DatabaseException e) {
  57                         ErrorLogger.defaultLogError(e);
  58                         return e.getMessage();
  59                 }
  60         }
  61
  62         @Override
  63         public void modify(final String label) {
  64                 try {
  65                         processor.syncRequest(new WriteRequest() {
  66                                 @Override
  67                                 public void perform(WriteGraph graph) throws DatabaseException {
  68                                         StringModifier modifier = graph.adapt(resource, StringModifier.class);
  69                                         modifier.modify(graph, label);
  70                                 }
  71                         });
  72                 } catch (DatabaseException e) {
  73                         ErrorLogger.defaultLogError(e);
  74                 }
  75         }
  76
  77 }