bundles/org.simantics.mapping/src/org/simantics/mapping/rule/instructions/AndRuleInstruction.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 \r
  24 public class AndRuleInstruction implements IRuleInstruction {\r
  25         IRuleInstruction[] rules;\r
  26 \r
  27         public AndRuleInstruction(IRuleInstruction ... rules) {\r
  28                 this.rules = rules;\r
  29         }\r
  30 \r
  31         @Override\r
  32         public IModification execute(ReadGraph g, Object[] bindings) throws DatabaseException {\r
  33                 for(int i=0;i<rules.length;++i) {\r
  34                         if(DEBUG)\r
  35                             System.out.println("AndRuleInstruction.execute " + i + "/" + rules.length);\r
  36                         IRuleInstruction rule = rules[i];\r
  37                         final IModification modi = rule.execute(g, bindings);\r
  38                         if(modi != null) {\r
  39                                 final int si = i+1;\r
  40                                 if(si==rules.length)\r
  41                                         return modi;\r
  42                                 else {\r
  43                                         final Object[] curBindings = Arrays.copyOf(bindings, bindings.length);                                  \r
  44                                         return new IModification() {\r
  45 \r
  46                                                 @Override\r
  47                                                 public void perform(WriteGraph g) throws DatabaseException {\r
  48                                                         modi.perform(g);\r
  49                                                         for(int j=si;j<rules.length;++j)\r
  50                                                                 rules[j].doExecute(g, curBindings);\r
  51                                                 }\r
  52                                                 \r
  53                                                 @Override\r
  54                                                 public String toString() {\r
  55                                                     StringBuilder b = new StringBuilder();\r
  56                                                     b.append("AndRuleInstruction");\r
  57                                                     for(IRuleInstruction i : rules) i.toString(b, 2);\r
  58                                                     return b.toString();\r
  59                                                 }\r
  60                                                 \r
  61                                         };\r
  62                                 }\r
  63                         }\r
  64                 }\r
  65                 return null;\r
  66         }\r
  67         \r
  68         @Override\r
  69         public void doExecute(WriteGraph g, Object[] bindings) throws DatabaseException {\r
  70                 for(IRuleInstruction rule : rules)\r
  71                         rule.doExecute(g, bindings);\r
  72         }\r
  73         \r
  74         @Override\r
  75         public void collectVariables(TIntHashSet reads, TIntHashSet writes) {\r
  76                 for(IRuleInstruction r : rules)\r
  77                         r.collectVariables(reads, writes);\r
  78         }\r
  79 \r
  80         @Override\r
  81         public void mapVariables(TIntIntHashMap map) {\r
  82                 for(IRuleInstruction r : rules)\r
  83                         r.mapVariables(map);\r
  84         }\r
  85         \r
  86         @Override\r
  87         public void toString(StringBuilder b, int indent) {\r
  88                 for(IRuleInstruction rule : rules)\r
  89                         rule.toString(b, indent);\r
  90         }\r
  91 }\r