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;
\r
14 import gnu.trove.map.hash.TObjectIntHashMap;
\r
16 import org.simantics.db.Resource;
\r
17 import org.simantics.mapping.constraint.IConstraint;
\r
18 import org.simantics.mapping.constraint.TooManyUnboundVariablesException;
\r
19 import org.simantics.mapping.constraint.instructions.IInstruction;
\r
20 import org.simantics.mapping.rule.instructions.IRuleInstruction;
\r
21 import org.simantics.mapping.rule.instructions.IfRuleInstruction;
\r
22 import org.simantics.utils.datastructures.persistent.ImmutableSet;
\r
24 public class IfRule implements IRule {
\r
26 IConstraint condition;
\r
30 public IfRule(IConstraint condition, IRule thenRule, IRule elseRule) {
\r
31 this.condition = condition;
\r
32 this.thenRule = thenRule;
\r
33 this.elseRule = elseRule;
\r
36 public IfRule(IConstraint condition, IRule thenRule) {
\r
37 this(condition, thenRule, null);
\r
41 public ImmutableSet<Resource> binds() {
\r
42 ImmutableSet<Resource> ret = condition.binds().addAll(thenRule.binds());
\r
43 if(elseRule != null)
\r
44 ret = ret.addAll(elseRule.binds());
\r
49 public IRuleInstruction createInstruction(
\r
50 TObjectIntHashMap<Resource> variableIds,
\r
51 ImmutableSet<Resource> bound) throws TooManyUnboundVariablesException {
\r
52 IInstruction conditionInstruction =
\r
53 condition.createInstruction(variableIds, bound);
\r
54 bound = bound.addAll(condition.binds());
\r
55 return new IfRuleInstruction(conditionInstruction,
\r
56 thenRule.createInstruction(variableIds, bound),
\r
57 elseRule == null ? null : elseRule.createInstruction(variableIds, bound));
\r