bundles/org.simantics.mapping/src/org/simantics/mapping/rule/UnlessRule.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;
  13
  14 import gnu.trove.map.hash.TObjectIntHashMap;
  15
  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.UnlessRuleInstruction;
  22 import org.simantics.utils.datastructures.persistent.ImmutableSet;
  23
  24 public class UnlessRule implements IRule {
  25
  26         IConstraint condition;
  27         IRule rule;
  28
  29         public UnlessRule(IConstraint condition, IRule rule) {
  30                 this.condition = condition;
  31                 this.rule = rule;
  32         }
  33
  34         @Override
  35         public ImmutableSet<Resource> binds() {
  36                 return condition.binds().addAll(rule.binds());
  37         }
  38
  39         @Override
  40         public IRuleInstruction createInstruction(
  41                         TObjectIntHashMap<Resource> variableIds,
  42                         ImmutableSet<Resource> bound) throws TooManyUnboundVariablesException {
  43                 IInstruction conditionInstruction =
  44                         condition.createInstruction(variableIds, bound);
  45                 bound = bound.addAll(condition.binds());
  46                 return new UnlessRuleInstruction(conditionInstruction,
  47                                 rule.createInstruction(variableIds, bound));
  48         }
  49
  50 }