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
10 * VTT Technical Research Centre of Finland - initial API and implementation
\r
11 *******************************************************************************/
\r
12 package org.simantics.mapping.rule.instructions;
\r
14 import gnu.trove.map.hash.TIntIntHashMap;
\r
15 import gnu.trove.set.hash.TIntHashSet;
\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.layer0.utils.triggers.IModification;
\r
21 import org.simantics.mapping.constraint.instructions.IInstruction;
\r
23 public class IfRuleInstruction implements IRuleInstruction {
\r
24 IInstruction condition;
\r
25 IRuleInstruction rule;
\r
26 IRuleInstruction elseRule;
\r
28 public IfRuleInstruction(IInstruction condition, IRuleInstruction rule, IRuleInstruction elseRule) {
\r
29 this.condition = condition;
\r
31 this.elseRule = elseRule;
\r
34 public IfRuleInstruction(IInstruction condition, IRuleInstruction rule) {
\r
35 this(condition, rule, null);
\r
39 public IModification execute(ReadGraph g, final Object[] bindings) throws DatabaseException {
\r
41 System.out.println("IfRuleInstruction: condition");
\r
42 Object cont = condition.query(g, bindings);
\r
43 if(cont == IInstruction.FAILURE) {
\r
45 System.out.println("IfRuleInstruction: else");
\r
47 return elseRule.execute(g, bindings);
\r
53 System.out.println("IfRuleInstruction: modification");
\r
54 final IModification modi = rule.execute(g, bindings);
\r
58 final Object curCont = condition.next(g, bindings, cont);
\r
59 if(curCont==IInstruction.FAILURE)
\r
61 return new IModification() {
\r
63 public void perform(WriteGraph g) throws DatabaseException {
\r
65 Object cont = curCont;
\r
67 rule.doExecute(g, bindings);
\r
70 cont = condition.next(g, bindings, cont);
\r
71 } while(cont != IInstruction.FAILURE);
\r
77 cont = condition.next(g, bindings, cont);
\r
78 } while(cont != IInstruction.FAILURE);
\r
83 public void doExecute(WriteGraph g, Object[] bindings) throws DatabaseException {
\r
84 Object cont = condition.query(g, bindings);
\r
85 if(cont == IInstruction.FAILURE) {
\r
87 elseRule.doExecute(g, bindings);
\r
91 rule.doExecute(g, bindings);
\r
94 cont = condition.next(g, bindings, cont);
\r
95 } while(cont != IInstruction.FAILURE);
\r
99 public void collectVariables(TIntHashSet reads, TIntHashSet writes) {
\r
100 condition.collectVariables(reads, writes);
\r
101 rule.collectVariables(reads, writes);
\r
102 if(elseRule != null)
\r
103 elseRule.collectVariables(reads, writes);
\r
107 public void mapVariables(TIntIntHashMap map) {
\r
108 condition.mapVariables(map);
\r
109 rule.mapVariables(map);
\r
110 if(elseRule != null)
\r
111 elseRule.mapVariables(map);
\r
115 public void toString(StringBuilder b, int indent) {
\r
117 condition.toString(b, indent+1);
\r
120 for(int i=0;i<indent;++i)
\r
121 b.append(INDENTATION);
\r
123 rule.toString(b, indent+1);
\r
125 if(elseRule != null) {
\r
127 for(int i=0;i<indent;++i)
\r
128 b.append(INDENTATION);
\r
130 elseRule.toString(b, indent+1);
\r