bundles/org.simantics.db.common/src/org/simantics/db/common/primitiverequest/ForEachPredicateBasedOn.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.primitiverequest;\r
  13 \r
  14 import org.simantics.db.AsyncReadGraph;\r
  15 import org.simantics.db.Resource;\r
  16 import org.simantics.db.common.procedure.adapter.AsyncProcedureDelegate;\r
  17 import org.simantics.db.common.procedure.guarded.GuardedAsyncMultiProcedure;\r
  18 import org.simantics.db.common.request.ResourceAsyncMultiRead2;\r
  19 import org.simantics.db.procedure.AsyncMultiProcedure;\r
  20 \r
  21 final public class ForEachPredicateBasedOn extends ResourceAsyncMultiRead2<Resource> {\r
  22 \r
  23     public ForEachPredicateBasedOn(Resource resource, Resource superRelation) {\r
  24         super(resource, superRelation);\r
  25     }\r
  26 \r
  27         @Override\r
  28         public void perform(AsyncReadGraph graph, AsyncMultiProcedure<Resource> procedure) {\r
  29                 \r
  30                 graph.forEachPredicate(resource, new GuardedAsyncMultiProcedure<Resource>(procedure) {\r
  31 \r
  32                         @Override\r
  33                         public void execute(AsyncReadGraph graph, final Resource predicate) {\r
  34                                 \r
  35                                 inc();\r
  36                                 \r
  37                                 graph.forIsSubrelationOf(predicate, resource2, new AsyncProcedureDelegate<Boolean>(this) {\r
  38 \r
  39                                         @Override\r
  40                                         public void execute(AsyncReadGraph graph, Boolean isSubrelation) {\r
  41                                                 if(isSubrelation) {\r
  42                                                         offer(graph, predicate);\r
  43                                                 }\r
  44                                                 dec(graph);\r
  45                                         }\r
  46                                         \r
  47                                 });\r
  48                                 \r
  49                         }\r
  50                 \r
  51         });\r
  52                 \r
  53         }\r
  54 \r
  55 }\r