bundles/org.simantics.mapping/src/org/simantics/mapping/constraint/ConstraintConjunction.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.constraint;
  13
  14 import gnu.trove.map.hash.TObjectIntHashMap;
  15
  16 import org.simantics.db.Resource;
  17 import org.simantics.mapping.constraint.instructions.AndInstruction;
  18 import org.simantics.mapping.constraint.instructions.IInstruction;
  19 import org.simantics.utils.datastructures.persistent.ImmutableSet;
  20
  21 public class ConstraintConjunction implements IConstraint {
  22
  23         IConstraint[] constraints;
  24
  25         public ConstraintConjunction(IConstraint... constraints) {
  26                 this.constraints = constraints;
  27         }
  28
  29         @Override
  30         public ImmutableSet<Resource> binds() {
  31                 ImmutableSet<Resource> ret = ImmutableSet.empty();
  32                 for(IConstraint c : constraints)
  33                         ret = ret.addAll(c.binds());
  34                 return ret;
  35         }
  36
  37         @Override
  38         public IInstruction createInstruction(
  39                         TObjectIntHashMap<Resource> variableIds,
  40                         ImmutableSet<Resource> bound) throws TooManyUnboundVariablesException {
  41                 IInstruction[] instructions = new IInstruction[constraints.length];
  42                 for(int i=0;i<constraints.length;++i) {
  43                         instructions[i] = constraints[i].createInstruction(variableIds, bound);
  44                         bound = bound.addAll(constraints[i].binds());
  45                 }
  46                 return new AndInstruction(instructions);
  47         }
  48
  49         @Override
  50         public int isApplicable(ImmutableSet<Resource> bound) {
  51                 int ret = Integer.MAX_VALUE;
  52                 for(int i=0;i<constraints.length;++i) {
  53                         int temp = constraints[i].isApplicable(bound);
  54                         if(temp < ret) {
  55                                 if(temp == 0)
  56                                         return 0;
  57                                 ret = temp;
  58                         }
  59                         bound = bound.addAll(constraints[i].binds());
  60                 }
  61                 return ret;
  62         }
  63
  64
  65
  66 }