bundles/org.simantics.mapping/src/org/simantics/mapping/rule/instructions/DenyRuleInstruction.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.mapping.rule.instructions;\r
  13 \r
  14 import gnu.trove.map.hash.TIntIntHashMap;\r
  15 import gnu.trove.set.hash.TIntHashSet;\r
  16 \r
  17 import java.util.Arrays;\r
  18 \r
  19 import org.simantics.db.ReadGraph;\r
  20 import org.simantics.db.WriteGraph;\r
  21 import org.simantics.db.exception.DatabaseException;\r
  22 import org.simantics.layer0.utils.triggers.IModification;\r
  23 import org.simantics.mapping.IContextualModification;\r
  24 import org.simantics.mapping.constraint.instructions.IInstruction;\r
  25 \r
  26 public class DenyRuleInstruction implements IRuleInstruction {\r
  27 \r
  28         IInstruction instruction;       \r
  29         \r
  30         public DenyRuleInstruction(IInstruction instruction) {\r
  31                 this.instruction = instruction;\r
  32         }\r
  33         \r
  34         @Override\r
  35         public IModification execute(ReadGraph g, Object[] bindings) throws DatabaseException {\r
  36                 final IContextualModification modi = instruction.deny(g, bindings); \r
  37                 if(modi != null) {\r
  38                         final Object[] curBindings = Arrays.copyOf(bindings, bindings.length);\r
  39                         return new IModification() {\r
  40 \r
  41                                 @Override\r
  42                                 public void perform(WriteGraph g) throws DatabaseException {\r
  43                                         modi.perform(g, curBindings);\r
  44                                 }\r
  45                                 \r
  46                         };\r
  47                 }\r
  48                 return null;\r
  49         }\r
  50         \r
  51         @Override\r
  52         public void doExecute(WriteGraph g, Object[] bindings) throws DatabaseException {\r
  53                 instruction.doDeny(g, bindings);\r
  54         }\r
  55 \r
  56         @Override\r
  57         public void collectVariables(TIntHashSet reads, TIntHashSet writes) {\r
  58                 instruction.collectVariables(reads, writes);\r
  59         }\r
  60 \r
  61         @Override\r
  62         public void mapVariables(TIntIntHashMap map) {\r
  63                 instruction.mapVariables(map);\r
  64         }\r
  65         \r
  66         @Override\r
  67         public void toString(StringBuilder b, int indent) {             \r
  68                 b.append("deny ");\r
  69                 instruction.toString(b, indent+1);      \r
  70         }\r
  71 }\r