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.common.utils.Logger;
  16 import org.simantics.db.exception.DatabaseException;
  17 import org.simantics.db.impl.graph.ReadGraphImpl;
  18 import org.simantics.db.impl.procedure.InternalProcedure;
  19 import org.simantics.db.procedure.ListenerBase;
  20 import org.simantics.db.request.RequestFlags;
  21
  22 import gnu.trove.procedure.TIntProcedure;
  23
  24 final public class Predicates extends UnaryQuery<InternalProcedure<IntSet>> {
  25
  26         Predicates(final int r) {
  27         super(r);
  28     }
  29
  30         @Override
  31         final public void removeEntry(QueryProcessor provider) {
  32         provider.cache.remove(this);
  33         }
  34
  35     final static private void forAssertions(ReadGraphImpl graph, int r, Predicates entry, final IntSet set) throws DatabaseException {
  36
  37         QueryCache.runnerPrincipalTypes(graph, r, entry, null, new SyncIntProcedure() {
  38
  39             @Override
  40             public void run(ReadGraphImpl graph) throws DatabaseException {
  41             }
  42
  43             IntProcedure proc = new IntProcedure() {
  44
  45                 @Override
  46                 public void execute(ReadGraphImpl graph, int i) throws DatabaseException {
  47                         set.add(i);
  48                 }
  49
  50                 @Override
  51                 public void finished(ReadGraphImpl graph) throws DatabaseException {
  52                     dec(graph);
  53                 }
  54
  55                                 @Override
  56                                 public void exception(ReadGraphImpl graph, Throwable t) throws DatabaseException {
  57                     if(DebugException.DEBUG) new DebugException(t).printStackTrace();
  58                     }
  59
  60             };
  61
  62             @Override
  63             public void execute(ReadGraphImpl graph, int type) throws DatabaseException {
  64
  65                 inc();
  66                 QueryCache.runnerAssertedPredicates(graph, type, entry, null, proc);
  67
  68             }
  69
  70             @Override
  71             public void finished(ReadGraphImpl graph) throws DatabaseException {
  72                 dec(graph);
  73             }
  74
  75         });
  76
  77
  78     }
  79
  80         @Override
  81         public Object compute(ReadGraphImpl graph, final InternalProcedure<IntSet> procedure) throws DatabaseException {
  82                 computeForEach(graph, id, this, procedure);
  83                 return getResult();
  84         }
  85
  86         public static void computeForEach(ReadGraphImpl graph, final int r, final Predicates entry, final InternalProcedure<IntSet> procedure) throws DatabaseException {
  87
  88
  89         IntSet direct = QueryCache.resultDirectPredicates(graph, r, entry, null, procedure);
  90                 IntSet result = new IntSet();
  91                 direct.forEach(new TIntProcedure() {
  92                         @Override
  93                         public boolean execute(int value) {
  94                                 result.add(value);
  95                                 return true;
  96                         }
  97                 });
  98
  99         forAssertions(graph, r, entry, result);
 100
 101 //              DirectPredicates.queryEach(graph, r, processor, entry, null, new IntProcedure() {
 102 //
 103 //                      @Override
 104 //                      public void execute(ReadGraphImpl graph, final int pred) throws DatabaseException {
 105 //                              result.add(pred);
 106 //                      }
 107 //
 108 //                      @Override
 109 //                      public void finished(ReadGraphImpl graph) throws DatabaseException {
 110 //
 111 //
 112 //                      }
 113 //
 114 //                      @Override
 115 //                      public void exception(ReadGraphImpl graph, Throwable t) throws DatabaseException {
 116 //                              procedure.exception(graph, t);
 117 //                      }
 118 //
 119 //              });
 120
 121                 if(entry != null) {
 122                         entry.setResult(result);
 123                         entry.setReady();
 124                 }
 125
 126                 procedure.execute(graph, result);
 127
 128     }
 129
 130     @Override
 131     public String toString() {
 132         return "Predicates[" + id + "]";
 133     }
 134
 135     final public void finish(final ReadGraphImpl graph, QueryProcessor provider) {
 136
 137         synchronized(this) {
 138                 setReady();
 139         }
 140
 141     }
 142
 143     @Override
 144     public void clearResult(QuerySupport support) {
 145         setResult(new IntSet(support));
 146     }
 147
 148     @Override
 149     public Object performFromCache(final ReadGraphImpl graph, final InternalProcedure<IntSet> procedure) throws DatabaseException {
 150
 151         assert(isReady());
 152
 153         if(handleException(graph, procedure)) return EXCEPTED;
 154
 155         IntSet result = getResult();
 156
 157         procedure.execute(graph, result);
 158
 159         return result;
 160
 161     }
 162
 163     @Override
 164     public void recompute(ReadGraphImpl graph) throws DatabaseException {
 165
 166         compute(graph, new InternalProcedure<IntSet>() {
 167
 168                         @Override
 169                         public void exception(ReadGraphImpl graph, Throwable t) {
 170                                 throw new Error("Error in recompute.", t);
 171             }
 172
 173                         @Override
 174                         public void execute(ReadGraphImpl graph, IntSet i) {
 175                         }
 176
 177         });
 178
 179     }
 180
 181     @Override
 182     public int type() {
 183         return RequestFlags.IMMEDIATE_UPDATE;
 184     }
 185
 186
 187     @Override
 188     boolean isImmutable(ReadGraphImpl graph) {
 189         return graph.processor.isImmutable(id);
 190     }
 191
 192 }