bundles/org.simantics.mapping/src/org/simantics/mapping/rule/instructions/DenyRuleInstruction.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.mapping.rule.instructions;
  13
  14 import gnu.trove.map.hash.TIntIntHashMap;
  15 import gnu.trove.set.hash.TIntHashSet;
  16
  17 import java.util.Arrays;
  18
  19 import org.simantics.db.ReadGraph;
  20 import org.simantics.db.WriteGraph;
  21 import org.simantics.db.exception.DatabaseException;
  22 import org.simantics.layer0.utils.triggers.IModification;
  23 import org.simantics.mapping.IContextualModification;
  24 import org.simantics.mapping.constraint.instructions.IInstruction;
  25
  26 public class DenyRuleInstruction implements IRuleInstruction {
  27
  28         IInstruction instruction;
  29
  30         public DenyRuleInstruction(IInstruction instruction) {
  31                 this.instruction = instruction;
  32         }
  33
  34         @Override
  35         public IModification execute(ReadGraph g, Object[] bindings) throws DatabaseException {
  36                 final IContextualModification modi = instruction.deny(g, bindings);
  37                 if(modi != null) {
  38                         final Object[] curBindings = Arrays.copyOf(bindings, bindings.length);
  39                         return new IModification() {
  40
  41                                 @Override
  42                                 public void perform(WriteGraph g) throws DatabaseException {
  43                                         modi.perform(g, curBindings);
  44                                 }
  45
  46                         };
  47                 }
  48                 return null;
  49         }
  50
  51         @Override
  52         public void doExecute(WriteGraph g, Object[] bindings) throws DatabaseException {
  53                 instruction.doDeny(g, bindings);
  54         }
  55
  56         @Override
  57         public void collectVariables(TIntHashSet reads, TIntHashSet writes) {
  58                 instruction.collectVariables(reads, writes);
  59         }
  60
  61         @Override
  62         public void mapVariables(TIntIntHashMap map) {
  63                 instruction.mapVariables(map);
  64         }
  65
  66         @Override
  67         public void toString(StringBuilder b, int indent) {
  68                 b.append("deny ");
  69                 instruction.toString(b, indent+1);
  70         }
  71 }