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