bundles/org.simantics.mapping/src/org/simantics/mapping/constraint/instructions/CombinedInstruction.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.constraint.instructions;\r
  13 \r
  14 import gnu.trove.map.hash.TIntIntHashMap;\r
  15 import gnu.trove.set.hash.TIntHashSet;\r
  16 \r
  17 import org.simantics.db.ReadGraph;\r
  18 import org.simantics.db.WriteGraph;\r
  19 import org.simantics.db.exception.DatabaseException;\r
  20 import org.simantics.mapping.IContextualModification;\r
  21 \r
  22 public abstract class CombinedInstruction implements IInstruction {\r
  23         IInstruction[] instructions;\r
  24         \r
  25         public CombinedInstruction(IInstruction... instructions) {\r
  26                 this.instructions = instructions;\r
  27         }       \r
  28         \r
  29         class CompositeClaim implements IContextualModification {\r
  30 \r
  31                 IContextualModification modification;\r
  32                 int instructionId;\r
  33                 \r
  34                 public CompositeClaim(IContextualModification modification, int instructionId) {\r
  35                         this.modification = modification;\r
  36                         this.instructionId = instructionId;\r
  37                 }\r
  38 \r
  39                 @Override\r
  40                 public void perform(WriteGraph g, Object[] bindings) throws DatabaseException {\r
  41                         modification.perform(g, bindings);\r
  42                         for(int i=instructionId+1;i<instructions.length;++i)\r
  43                                 instructions[i].doClaim(g, bindings);\r
  44                 }\r
  45                 \r
  46         }\r
  47         \r
  48         @Override\r
  49         public IContextualModification claim(ReadGraph g, Object[] bindings) throws DatabaseException {\r
  50                 for(int instructionId=0;instructionId<instructions.length;++instructionId) {\r
  51                         IContextualModification modification = instructions[instructionId].claim(g, bindings);\r
  52                         if(modification != null) {\r
  53                                 if(instructionId==instructions.length-1)\r
  54                                         return modification;\r
  55                                 else \r
  56                                         return new CompositeClaim(modification, instructionId);\r
  57                         }\r
  58                 }\r
  59                 return null;\r
  60         }\r
  61 \r
  62         class CompositeDeny implements IContextualModification {\r
  63 \r
  64                 IContextualModification modification;\r
  65                 int instructionId;\r
  66                 \r
  67                 public CompositeDeny(IContextualModification modification, int instructionId) {\r
  68                         this.modification = modification;\r
  69                         this.instructionId = instructionId;\r
  70                 }\r
  71 \r
  72                 @Override\r
  73                 public void perform(WriteGraph g, Object[] bindings) throws DatabaseException {\r
  74                         modification.perform(g, bindings);\r
  75                         for(int i=instructionId+1;i<instructions.length;++i)\r
  76                                 instructions[i].doDeny(g, bindings);\r
  77                 }\r
  78                 \r
  79         }\r
  80 \r
  81         @Override\r
  82         public IContextualModification deny(ReadGraph g, Object[] bindings) throws DatabaseException {\r
  83                 for(int instructionId=0;instructionId<instructions.length;++instructionId) {\r
  84                         IContextualModification modification = instructions[instructionId].deny(g, bindings);\r
  85                         if(modification != null) {\r
  86                                 if(instructionId==instructions.length-1)\r
  87                                         return modification;\r
  88                                 else \r
  89                                         return new CompositeDeny(modification, instructionId);\r
  90                         }\r
  91                 }\r
  92                 return null;\r
  93         }\r
  94 \r
  95         @Override\r
  96         public void doClaim(WriteGraph g, Object[] bindings) throws DatabaseException {\r
  97                 for(int i=0;i<instructions.length;++i)\r
  98                         instructions[i].doClaim(g, bindings);           \r
  99         }\r
 100 \r
 101         @Override\r
 102         public void doDeny(WriteGraph g, Object[] bindings) throws DatabaseException {\r
 103                 for(int i=0;i<instructions.length;++i)\r
 104                         instructions[i].doDeny(g, bindings);                                    \r
 105         }\r
 106 \r
 107         @Override\r
 108         public void collectVariables(TIntHashSet reads, TIntHashSet writes) {\r
 109                 for(IInstruction inst : instructions)\r
 110                         inst.collectVariables(reads, writes);\r
 111         }       \r
 112         \r
 113         @Override\r
 114         public void mapVariables(TIntIntHashMap map) {\r
 115                 for(IInstruction inst : instructions)\r
 116                         inst.mapVariables(map);\r
 117         }\r
 118 \r
 119 }\r