1 /*******************************************************************************
2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.mapping.rule;
14 import gnu.trove.map.hash.TObjectIntHashMap;
16 import org.simantics.db.Resource;
17 import org.simantics.mapping.constraint.IConstraint;
18 import org.simantics.mapping.constraint.TooManyUnboundVariablesException;
19 import org.simantics.mapping.constraint.instructions.IInstruction;
20 import org.simantics.mapping.rule.instructions.IRuleInstruction;
21 import org.simantics.mapping.rule.instructions.IfRuleInstruction;
22 import org.simantics.utils.datastructures.persistent.ImmutableSet;
24 public class IfRule implements IRule {
26 IConstraint condition;
30 public IfRule(IConstraint condition, IRule thenRule, IRule elseRule) {
31 this.condition = condition;
32 this.thenRule = thenRule;
33 this.elseRule = elseRule;
36 public IfRule(IConstraint condition, IRule thenRule) {
37 this(condition, thenRule, null);
41 public ImmutableSet<Resource> binds() {
42 ImmutableSet<Resource> ret = condition.binds().addAll(thenRule.binds());
44 ret = ret.addAll(elseRule.binds());
49 public IRuleInstruction createInstruction(
50 TObjectIntHashMap<Resource> variableIds,
51 ImmutableSet<Resource> bound) throws TooManyUnboundVariablesException {
52 IInstruction conditionInstruction =
53 condition.createInstruction(variableIds, bound);
54 bound = bound.addAll(condition.binds());
55 return new IfRuleInstruction(conditionInstruction,
56 thenRule.createInstruction(variableIds, bound),
57 elseRule == null ? null : elseRule.createInstruction(variableIds, bound));