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         IntSet direct = QueryCache.resultDirectPredicates(graph, r, entry, null);
  89
  90                 IntSet result = new IntSet(graph.processor.querySupport);
  91         forAssertions(graph, r, entry, result);
  92
  93         if(result.isEmpty()) {
  94
  95                 if(entry != null) {
  96                         entry.setResult(direct);
  97                         entry.setReady();
  98                 }
  99
 100                 procedure.execute(graph, direct);
 101
 102         } else {
 103
 104                 direct.forEach(new TIntProcedure() {
 105                         @Override
 106                         public boolean execute(int value) {
 107                                 result.add(value);
 108                                 return true;
 109                         }
 110                 });
 111
 112                 if(entry != null) {
 113                         entry.setResult(result);
 114                         entry.setReady();
 115                 }
 116
 117                 procedure.execute(graph, result);
 118
 119         }
 120
 121
 122     }
 123
 124     @Override
 125     public String toString() {
 126         return "Predicates[" + id + "]";
 127     }
 128
 129     final public void finish(final ReadGraphImpl graph, QueryProcessor provider) {
 130
 131         synchronized(this) {
 132                 setReady();
 133         }
 134
 135     }
 136
 137     @Override
 138     public void clearResult(QuerySupport support) {
 139         setResult(new IntSet(support));
 140     }
 141
 142     @Override
 143     public Object performFromCache(final ReadGraphImpl graph, final InternalProcedure<IntSet> procedure) throws DatabaseException {
 144
 145         assert(isReady());
 146
 147         if(handleException(graph, procedure)) return EXCEPTED;
 148
 149         IntSet result = getResult();
 150
 151         procedure.execute(graph, result);
 152
 153         return result;
 154
 155     }
 156
 157     @Override
 158     public void recompute(ReadGraphImpl graph) throws DatabaseException {
 159
 160         compute(graph, new InternalProcedure<IntSet>() {
 161
 162                         @Override
 163                         public void exception(ReadGraphImpl graph, Throwable t) {
 164                                 throw new Error("Error in recompute.", t);
 165             }
 166
 167                         @Override
 168                         public void execute(ReadGraphImpl graph, IntSet i) {
 169                         }
 170
 171         });
 172
 173     }
 174
 175     @Override
 176     public int type() {
 177         return RequestFlags.IMMEDIATE_UPDATE;
 178     }
 179
 180
 181     @Override
 182     boolean isImmutable(ReadGraphImpl graph) {
 183         return graph.processor.isImmutable(id);
 184     }
 185
 186 }