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