bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/Predicates.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.common.exception.DebugException;
  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 import gnu.trove.procedure.TIntProcedure;
  21
  22 final public class Predicates extends UnaryQueryP<IntSet> {
  23
  24         Predicates(final int r) {
  25         super(r);
  26     }
  27
  28         @Override
  29         final public void removeEntry(QueryProcessor provider) {
  30         provider.cache.remove(this);
  31         }
  32
  33     final static private void forAssertions(ReadGraphImpl graph, int r, Predicates parent, final IntSet set) throws DatabaseException {
  34
  35         QueryCache.runnerPrincipalTypes(graph, r, parent, null, new SyncIntProcedure() {
  36
  37             @Override
  38             public void run(ReadGraphImpl graph) throws DatabaseException {
  39             }
  40
  41             IntProcedure proc = new IntProcedure() {
  42
  43                 @Override
  44                 public void execute(ReadGraphImpl graph, int i) throws DatabaseException {
  45                         set.add(i);
  46                 }
  47
  48                 @Override
  49                 public void finished(ReadGraphImpl graph) throws DatabaseException {
  50                     dec(graph);
  51                 }
  52
  53                                 @Override
  54                                 public void exception(ReadGraphImpl graph, Throwable t) throws DatabaseException {
  55                     if(DebugException.DEBUG) new DebugException(t).printStackTrace();
  56                     }
  57
  58             };
  59
  60             @Override
  61             public void execute(ReadGraphImpl graph, int type) throws DatabaseException {
  62
  63                 inc();
  64                 QueryCache.runnerAssertedPredicates(graph, type, parent, null, proc);
  65
  66             }
  67
  68             @Override
  69             public void finished(ReadGraphImpl graph) throws DatabaseException {
  70                 dec(graph);
  71             }
  72
  73         });
  74
  75
  76     }
  77
  78         @Override
  79         public void compute(ReadGraphImpl graph, final InternalProcedure<IntSet> procedure) throws DatabaseException {
  80                 computeForEach(graph, id, this, procedure);
  81         }
  82
  83         public static void computeForEach(ReadGraphImpl graph, final int r, final Predicates entry, final InternalProcedure<IntSet> procedure_) throws DatabaseException {
  84
  85             InternalProcedure<IntSet> procedure = entry != null ? entry : procedure_;
  86
  87         IntSet direct = QueryCache.resultDirectPredicates(graph, r, entry, null);
  88
  89                 IntSet result = new IntSet(graph.processor.querySupport);
  90         forAssertions(graph, r, entry, result);
  91
  92         if(result.isEmpty()) {
  93                 procedure.execute(graph, direct);
  94         } else {
  95                 direct.forEach(new TIntProcedure() {
  96                         @Override
  97                         public boolean execute(int value) {
  98                                 result.add(value);
  99                                 return true;
 100                         }
 101                 });
 102                 procedure.execute(graph, result);
 103         }
 104
 105         if(entry != null) entry.performFromCache(graph, procedure_);
 106
 107     }
 108
 109     @Override
 110     public String toString() {
 111         return "Predicates[" + id + "]";
 112     }
 113
 114     @Override
 115     public void clearResult(QuerySupport support) {
 116         setResult(new IntSet(support));
 117     }
 118
 119     @Override
 120     public int type() {
 121         return RequestFlags.IMMEDIATE_UPDATE;
 122     }
 123
 124 }