bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/DirectPredicates.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2018 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
  19 public final class DirectPredicates extends UnaryQueryP<IntSet> {
  20
  21         DirectPredicates(final int resource) {
  22                 super(resource);
  23         }
  24
  25         @Override
  26         public final void removeEntry(QueryProcessor provider) {
  27                 provider.cache.remove(this);
  28         }
  29
  30         @Override
  31         public void compute(ReadGraphImpl graph, InternalProcedure<IntSet> procedure) throws DatabaseException {
  32                 computeForEach(graph, id, this, procedure);
  33         }
  34
  35         public static Object computeForEach(ReadGraphImpl graph, int id, final DirectPredicates entry, final InternalProcedure<IntSet> procedure_) throws DatabaseException {
  36
  37                 InternalProcedure<IntSet> procedure = entry != null ? entry : procedure_;
  38
  39                 graph.processor.querySupport.ensureLoaded(graph, id);
  40
  41                 final IntSet list = new IntSet(graph.processor.querySupport);
  42
  43                 graph.processor.querySupport.getPredicates(graph, id, new IntProcedure() {
  44
  45                         @Override
  46                         public void execute(ReadGraphImpl graph, int i) {
  47                                 list.add(i);
  48                         }
  49
  50                         @Override
  51                         public void finished(ReadGraphImpl graph) {
  52                         }
  53
  54                         @Override
  55                         public void exception(ReadGraphImpl graph, Throwable t) {
  56                                 if(DebugException.DEBUG) new DebugException(t).printStackTrace();
  57                         }
  58
  59                 });
  60
  61                 procedure.execute(graph, list);
  62
  63                 if(entry != null) entry.performFromCache(graph, procedure_);
  64
  65                 return list;
  66
  67         }
  68
  69         @Override
  70         public String toString() {
  71                 return "DirectPredicates[" + id + "]";
  72         }
  73
  74 }