bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/modifiers/L0StringModifier.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2011 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.model.modifiers;
  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.Statement;
  20 import org.simantics.db.WriteGraph;
  21 import org.simantics.db.common.primitiverequest.PossibleAdapter;
  22 import org.simantics.db.common.request.WriteRequest;
  23 import org.simantics.db.exception.DatabaseException;
  24 import org.simantics.db.layer0.adapter.StringModifier;
  25 import org.simantics.db.layer0.util.Layer0Utils;
  26 import org.simantics.db.request.Read;
  27 import org.simantics.layer0.Layer0;
  28
  29 public class L0StringModifier implements Modifier {
  30
  31         private final RequestProcessor processor;
  32         private final Resource         subject;
  33         private final Resource         propertyRelation;
  34         private final Resource         literal;
  35
  36         public L0StringModifier(RequestProcessor processor, Resource subject, Resource propertyRelation, Resource literal) {
  37                 this.processor = processor;
  38                 this.subject = subject;
  39                 this.propertyRelation = propertyRelation;
  40                 this.literal = literal;
  41         }
  42
  43         @Override
  44         public String getValue() {
  45                 try {
  46                         return processor.syncRequest(new PossibleAdapter<String>(literal, String.class));
  47                 } catch (DatabaseException e) {
  48                         ErrorLogger.defaultLogError(e);
  49                         return null;
  50                 }
  51         }
  52
  53         @Override
  54         public String isValid(final String label) {
  55                 try {
  56                         return processor.syncRequest(new Read<String>() {
  57                                 @Override
  58                                 public String perform(ReadGraph graph) throws DatabaseException {
  59                                         StringModifier modifier = graph.adapt(literal, StringModifier.class);
  60                                         return modifier.isValid(label);
  61                                 }
  62                         });
  63                 } catch (DatabaseException e) {
  64                         ErrorLogger.defaultLogError(e);
  65                         return e.getMessage();
  66                 }
  67         }
  68
  69         @Override
  70         public void modify(final String label) {
  71                 try {
  72                         processor.syncRequest(new WriteRequest() {
  73                                 @Override
  74                                 public void perform(WriteGraph graph) throws DatabaseException {
  75                                         Layer0Utils.addCommentMetadata(graph, "Modify string");
  76                         graph.markUndoPoint();
  77                                         Statement stm = graph.getPossibleStatement(subject, propertyRelation);
  78                                         if (stm.isAsserted(subject)) {
  79                                                 Layer0 L0 = Layer0.getInstance(graph);
  80                                                 Resource newLiteral = graph.newResource();
  81                                                 for (Resource iof : graph.getObjects(literal, L0.InstanceOf))
  82                                                         graph.claim(newLiteral, L0.InstanceOf, null, iof);
  83                                                 graph.claim(subject, propertyRelation, newLiteral);
  84                                                 StringModifier modifier = graph.adapt(newLiteral, StringModifier.class);
  85                                                 modifier.modify(graph, label);
  86                                         } else {
  87                                                 StringModifier modifier = graph.adapt(literal, StringModifier.class);
  88                                                 modifier.modify(graph, label);
  89                                         }
  90                                 }
  91                         });
  92                 } catch (DatabaseException e) {
  93                         ErrorLogger.defaultLogError(e);
  94                 }
  95         }
  96
  97 }