bundles/org.simantics.db.common/src/org/simantics/db/common/request/TypedParent.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.exception.DatabaseException;\r
  17 import org.simantics.db.procedure.AsyncProcedure;\r
  18 import org.simantics.layer0.Layer0;\r
  19 \r
  20 public class TypedParent extends ResourceAsyncRead2<Resource> {\r
  21 \r
  22         public TypedParent(Resource resource, Resource type) {\r
  23                 super(resource, type);\r
  24         }\r
  25 \r
  26         @Override\r
  27         public void perform(AsyncReadGraph graph, final AsyncProcedure<Resource> procedure) {\r
  28 \r
  29             final Layer0 l0 = graph.getService(Layer0.class);\r
  30 \r
  31                 graph.forIsInstanceOf(resource, resource2, new AsyncProcedure<Boolean>() {\r
  32 \r
  33                         @Override\r
  34                         public void execute(AsyncReadGraph graph, Boolean isInstance) {\r
  35                                 if(isInstance) {\r
  36                                         procedure.execute(graph, resource);\r
  37                                 } else {\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.exception(graph, new DatabaseException("Typed parent was not found."));\r
  45                                                         } else {\r
  46                                                                 graph.asyncRequest(new TypedParent(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                         @Override\r
  61                         public void exception(AsyncReadGraph graph, Throwable throwable) {\r
  62                                 procedure.exception(graph, throwable);\r
  63                         }\r
  64                 });\r
  65                 \r
  66                 \r
  67         }\r
  68 \r
  69 }\r