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

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2011 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.browsing.ui.model.modifiers;\r
  13 \r
  14 import org.simantics.browsing.ui.common.ErrorLogger;\r
  15 import org.simantics.browsing.ui.content.Labeler.Modifier;\r
  16 import org.simantics.db.ReadGraph;\r
  17 import org.simantics.db.RequestProcessor;\r
  18 import org.simantics.db.Resource;\r
  19 import org.simantics.db.Statement;\r
  20 import org.simantics.db.WriteGraph;\r
  21 import org.simantics.db.common.primitiverequest.PossibleAdapter;\r
  22 import org.simantics.db.common.request.WriteRequest;\r
  23 import org.simantics.db.exception.DatabaseException;\r
  24 import org.simantics.db.layer0.adapter.StringModifier;\r
  25 import org.simantics.db.layer0.util.Layer0Utils;\r
  26 import org.simantics.db.request.Read;\r
  27 import org.simantics.layer0.Layer0;\r
  28 \r
  29 public class L0StringModifier implements Modifier {\r
  30 \r
  31         private final RequestProcessor processor;\r
  32         private final Resource         subject;\r
  33         private final Resource         propertyRelation;\r
  34         private final Resource         literal;\r
  35 \r
  36         public L0StringModifier(RequestProcessor processor, Resource subject, Resource propertyRelation, Resource literal) {\r
  37                 this.processor = processor;\r
  38                 this.subject = subject;\r
  39                 this.propertyRelation = propertyRelation;\r
  40                 this.literal = literal;\r
  41         }\r
  42 \r
  43         @Override\r
  44         public String getValue() {\r
  45                 try {\r
  46                         return processor.syncRequest(new PossibleAdapter<String>(literal, String.class));\r
  47                 } catch (DatabaseException e) {\r
  48                         ErrorLogger.defaultLogError(e);\r
  49                         return null;\r
  50                 }\r
  51         }\r
  52 \r
  53         @Override\r
  54         public String isValid(final String label) {\r
  55                 try {\r
  56                         return processor.syncRequest(new Read<String>() {\r
  57                                 @Override\r
  58                                 public String perform(ReadGraph graph) throws DatabaseException {\r
  59                                         StringModifier modifier = graph.adapt(literal, StringModifier.class);\r
  60                                         return modifier.isValid(label);\r
  61                                 }\r
  62                         });\r
  63                 } catch (DatabaseException e) {\r
  64                         ErrorLogger.defaultLogError(e);\r
  65                         return e.getMessage();\r
  66                 }\r
  67         }\r
  68 \r
  69         @Override\r
  70         public void modify(final String label) {\r
  71                 try {\r
  72                         processor.syncRequest(new WriteRequest() {\r
  73                                 @Override\r
  74                                 public void perform(WriteGraph graph) throws DatabaseException {\r
  75                                         Layer0Utils.addCommentMetadata(graph, "Modify string");\r
  76                         graph.markUndoPoint();\r
  77                                         Statement stm = graph.getPossibleStatement(subject, propertyRelation);\r
  78                                         if (stm.isAsserted(subject)) {\r
  79                                                 Layer0 L0 = Layer0.getInstance(graph);\r
  80                                                 Resource newLiteral = graph.newResource();\r
  81                                                 for (Resource iof : graph.getObjects(literal, L0.InstanceOf))\r
  82                                                         graph.claim(newLiteral, L0.InstanceOf, null, iof);\r
  83                                                 graph.claim(subject, propertyRelation, newLiteral);\r
  84                                                 StringModifier modifier = graph.adapt(newLiteral, StringModifier.class);\r
  85                                                 modifier.modify(graph, label);\r
  86                                         } else {\r
  87                                                 StringModifier modifier = graph.adapt(literal, StringModifier.class);\r
  88                                                 modifier.modify(graph, label);\r
  89                                         }\r
  90                                 }\r
  91                         });\r
  92                 } catch (DatabaseException e) {\r
  93                         ErrorLogger.defaultLogError(e);\r
  94                 }\r
  95         }\r
  96 \r
  97 }\r