bundles/org.simantics.db.common/src/org/simantics/db/common/primitiverequest/ForEachPredicateBasedOn.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.db.common.primitiverequest;
  13
  14 import org.simantics.db.AsyncReadGraph;
  15 import org.simantics.db.Resource;
  16 import org.simantics.db.common.procedure.adapter.AsyncProcedureDelegate;
  17 import org.simantics.db.common.procedure.guarded.GuardedAsyncMultiProcedure;
  18 import org.simantics.db.common.request.ResourceAsyncMultiRead2;
  19 import org.simantics.db.procedure.AsyncMultiProcedure;
  20
  21 final public class ForEachPredicateBasedOn extends ResourceAsyncMultiRead2<Resource> {
  22
  23     public ForEachPredicateBasedOn(Resource resource, Resource superRelation) {
  24         super(resource, superRelation);
  25     }
  26
  27         @Override
  28         public void perform(AsyncReadGraph graph, AsyncMultiProcedure<Resource> procedure) {
  29
  30                 graph.forEachPredicate(resource, new GuardedAsyncMultiProcedure<Resource>(procedure) {
  31
  32                         @Override
  33                         public void execute(AsyncReadGraph graph, final Resource predicate) {
  34
  35                                 inc();
  36
  37                                 graph.forIsSubrelationOf(predicate, resource2, new AsyncProcedureDelegate<Boolean>(this) {
  38
  39                                         @Override
  40                                         public void execute(AsyncReadGraph graph, Boolean isSubrelation) {
  41                                                 if(isSubrelation) {
  42                                                         offer(graph, predicate);
  43                                                 }
  44                                                 dec(graph);
  45                                         }
  46
  47                                 });
  48
  49                         }
  50
  51         });
  52
  53         }
  54
  55 }