bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/RelationInfoQuery.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.impl.query;
  13
  14 import org.simantics.db.RelationInfo;
  15 import org.simantics.db.exception.DatabaseException;
  16 import org.simantics.db.impl.graph.ReadGraphImpl;
  17 import org.simantics.db.impl.procedure.InternalProcedure;
  18 import org.simantics.db.request.RequestFlags;
  19
  20 final public class RelationInfoQuery extends UnaryQueryP<RelationInfo> {
  21
  22         RelationInfoQuery(final int resource) {
  23         super(resource);
  24     }
  25
  26         @Override
  27         final public void removeEntry(QueryProcessor provider) {
  28                 provider.cache.remove(this);
  29         }
  30
  31         private static void computeAssertions(ReadGraphImpl graph, int r, final boolean isFinal, final boolean isFunctional, RelationInfoQuery parent, final InternalProcedure<RelationInfo> procedure) throws DatabaseException {
  32
  33                 QueryProcessor processor = graph.processor;
  34
  35             final int isUsedInAssertion = processor.getHasPredicateInverse();
  36         assert(isUsedInAssertion != 0);
  37
  38         QueryCache.runnerDirectObjects(graph, r, isUsedInAssertion, parent, null, new IntProcedure() {
  39
  40                 boolean done = false;
  41
  42                         @Override
  43                         public void execute(ReadGraphImpl graph, int i) throws DatabaseException {
  44                                 if(done) return;
  45                                 done = true;
  46                                 RelationInfo result = new RelationInfo(r, isFunctional, isFinal, true);
  47                                 procedure.execute(graph, result);
  48                         }
  49
  50                         @Override
  51                         public void finished(ReadGraphImpl graph) throws DatabaseException {
  52                                 if(done) return;
  53                                 done = true;
  54                                 RelationInfo result = new RelationInfo(r, isFunctional, isFinal, false);
  55                                 procedure.execute(graph, result);
  56                         }
  57
  58                         @Override
  59                         public void exception(ReadGraphImpl graph, Throwable throwable) throws DatabaseException {
  60                                 if(done) return;
  61                                 done = true;
  62                                 DatabaseException e = new DatabaseException("Internal error in RelationInfoQuery");
  63                                 procedure.exception(graph, e);
  64                         }
  65
  66                 });
  67
  68         }
  69
  70         public static void computeForEach(ReadGraphImpl graph, int r, RelationInfoQuery entry, InternalProcedure<RelationInfo> procedure_) throws DatabaseException {
  71
  72             InternalProcedure<RelationInfo> procedure = entry != null ? entry : procedure_;
  73
  74                 QueryProcessor provider = graph.processor;
  75
  76             final int superRelationOf = provider.getSuperrelationOf();
  77         assert(superRelationOf != 0);
  78
  79         IntSet direct = QueryCache.resultDirectPredicates(graph, r, entry, null);
  80         IntSet types = QueryCache.resultTypes(graph, r, entry, null);
  81
  82         computeAssertions(graph, r, !direct.contains(superRelationOf), types.contains(graph.processor.getFunctionalRelation()), entry, procedure);
  83
  84         if(entry != null) entry.performFromCache(graph, procedure_);
  85
  86         }
  87
  88         @Override
  89         public void compute(ReadGraphImpl graph, final InternalProcedure<RelationInfo> procedure) throws DatabaseException {
  90                 computeForEach(graph, id, this, procedure);
  91         }
  92
  93     @Override
  94     public String toString() {
  95         return "RelationInfoQuery[" + id + "]";
  96     }
  97
  98     @Override
  99     public void setResult(Object result) {
 100         super.setResult(result);
 101         setReady();
 102     }
 103
 104     @Override
 105     public int type() {
 106         return RequestFlags.IMMEDIATE_UPDATE;
 107     }
 108
 109 }