bundles/org.simantics.db.common/src/org/simantics/db/common/request/ObjectsWithTypeAsync.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 java.util.Collection;\r
  15 import java.util.Set;\r
  16 import java.util.concurrent.ConcurrentLinkedQueue;\r
  17 \r
  18 import org.simantics.db.AsyncReadGraph;\r
  19 import org.simantics.db.Resource;\r
  20 import org.simantics.db.common.ProcedureBarrier;\r
  21 import org.simantics.db.common.utils.Logger;\r
  22 import org.simantics.db.procedure.AsyncMultiProcedure;\r
  23 import org.simantics.db.procedure.AsyncProcedure;\r
  24 \r
  25 final public class ObjectsWithTypeAsync extends ResourceAsyncRead3<Collection<Resource>> {\r
  26 \r
  27     public ObjectsWithTypeAsync(Resource subject, Resource subrelationOf, Resource instanceOf) {\r
  28         super(subject, subrelationOf, instanceOf);\r
  29     }\r
  30 \r
  31     @Override\r
  32     public void perform(AsyncReadGraph graph, final AsyncProcedure<Collection<Resource>> procedure) {\r
  33 \r
  34         final Collection<Resource> result = new ConcurrentLinkedQueue<Resource>();\r
  35         final ProcedureBarrier<Collection<Resource>> ready = new ProcedureBarrier<Collection<Resource>>(1);\r
  36         \r
  37         graph.forEachObject(resource, resource2, new AsyncMultiProcedure<Resource>() {\r
  38 \r
  39                         @Override\r
  40                         public void execute(AsyncReadGraph graph, final Resource object) {\r
  41                                 \r
  42                                 ready.incrementAndGet();\r
  43                                 \r
  44                                 graph.forTypes(object, new AsyncProcedure<Set<Resource>>() {\r
  45                                         \r
  46                                         @Override\r
  47                                         public void execute(AsyncReadGraph graph, Set<Resource> types) {\r
  48 \r
  49                                                 if(types.contains(resource3)) {\r
  50                                                         result.add(object);\r
  51                                                 }\r
  52                                                 \r
  53                                                 ready.dec(graph, procedure, result);\r
  54                                                 \r
  55                                         }\r
  56                                         \r
  57                                         @Override\r
  58                                         public void exception(AsyncReadGraph graph, Throwable throwable) {\r
  59                                                 \r
  60                                                 throwable.printStackTrace();\r
  61                                         Logger.defaultLogError(throwable);\r
  62                                                 \r
  63                                                 ready.except(throwable);\r
  64                                                 ready.dec(graph, procedure, result);\r
  65                                                 \r
  66                                         }\r
  67                                         \r
  68                                 });\r
  69                                 \r
  70                         }\r
  71 \r
  72                         @Override\r
  73                         public void finished(AsyncReadGraph graph) {\r
  74                                 \r
  75                                 ready.dec(graph, procedure, result);\r
  76                                 \r
  77                         }\r
  78 \r
  79                         @Override\r
  80                         public void exception(AsyncReadGraph graph, Throwable throwable) {\r
  81                                 \r
  82                                 throwable.printStackTrace();\r
  83                         Logger.defaultLogError(throwable);\r
  84                                 \r
  85                                 ready.except(throwable);\r
  86                                 ready.dec(graph, procedure, result);\r
  87                                 \r
  88                         }\r
  89                 \r
  90         });\r
  91         \r
  92     }\r
  93     \r
  94 //    @Override\r
  95 //    public Collection<Resource> perform(ReadGraph graph) throws DatabaseException {\r
  96 //        \r
  97 //      Set<Resource> result = new HashSet<Resource>();\r
  98 //      for(Resource object : graph.getObjects(resource, resource2)) {\r
  99 //              if(graph.isInstanceOf(object, resource3)) result.add(object);\r
 100 //      }\r
 101 //      return result;\r
 102 //        \r
 103 //    }\r
 104 \r
 105 }\r