bundles/org.simantics.db.common/src/org/simantics/db/common/request/PossibleTypedParent.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 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.db.common.request;\r
  13 \r
  14 import org.simantics.db.AsyncReadGraph;\r
  15 import org.simantics.db.Resource;\r
  16 import org.simantics.db.procedure.AsyncProcedure;\r
  17 import org.simantics.layer0.Layer0;\r
  18 \r
  19 public class PossibleTypedParent extends ResourceAsyncRead2<Resource> {\r
  20 \r
  21         public PossibleTypedParent(Resource resource, Resource type) {\r
  22                 super(resource, type);\r
  23         }\r
  24 \r
  25         @Override\r
  26         public void perform(AsyncReadGraph graph, final AsyncProcedure<Resource> procedure) {\r
  27 \r
  28             final Layer0 l0 = graph.getService(Layer0.class);\r
  29 \r
  30                 graph.forIsInstanceOf(resource, resource2, new AsyncProcedure<Boolean>() {\r
  31 \r
  32                         @Override\r
  33                         public void execute(AsyncReadGraph graph, Boolean isInstance) {\r
  34                                 if(isInstance) {\r
  35                                         procedure.execute(graph, resource);\r
  36                                 } else {\r
  37                                         \r
  38                                         graph.forPossibleObject(resource, l0.PartOf, new AsyncProcedure<Resource>() {\r
  39 \r
  40                                                 @Override\r
  41                                                 public void execute(AsyncReadGraph graph, final Resource parent) {\r
  42 \r
  43                                                         if(parent == null) {\r
  44                                                                 procedure.execute(graph, null);\r
  45                                                         } else {\r
  46                                                                 graph.asyncRequest(new PossibleTypedParent(parent, resource2), procedure);\r
  47                                                         }\r
  48                                                         \r
  49                                                 }\r
  50 \r
  51                                                 @Override\r
  52                                                 public void exception(AsyncReadGraph graph, Throwable throwable) {\r
  53                                                         procedure.exception(graph, throwable);\r
  54                                                 }\r
  55                                                 \r
  56                                         });\r
  57                                         \r
  58                                 }\r
  59                         }\r
  60 \r
  61                         @Override\r
  62                         public void exception(AsyncReadGraph graph, Throwable throwable) {\r
  63                                 procedure.exception(graph, throwable);\r
  64                         }\r
  65                 });\r
  66                 \r
  67                 \r
  68         }\r
  69 \r
  70 }\r