bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/map/Associativity.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.utils.datastructures.map;
  13
  14
  15 /**
  16  * Description associativity of dimensions.
  17  * The maximum number of dimensions is 32.
  18  *
  19  * @author Toni Kalajainen <toni.kalajainen@vtt.fi>
  20  */
  21 public final class Associativity {
  22
  23         public static Associativity of(boolean...dimensionAssociativity)
  24         {
  25                 return new Associativity(dimensionAssociativity);
  26         }
  27
  28         public static Associativity[] fullAssociativity(int level)
  29         {
  30                 int count = (1 << level)-1;
  31                 Associativity[] result = new Associativity[count];
  32                 for (int i=0; i<count; i++)
  33                         result[i] = new Associativity(level, i);
  34                 return result;
  35         }
  36
  37         public int dimensionAssociativity;
  38         public int level;
  39
  40         public Associativity(boolean...dimensionAssociativity)
  41         {
  42                 if (dimensionAssociativity==null || dimensionAssociativity.length>32)
  43                         throw new IllegalArgumentException();
  44
  45                 int mask = 1;
  46                 for (boolean b : dimensionAssociativity) {
  47                         if (b) this.dimensionAssociativity |= mask;
  48                         mask <<= 1;
  49                 }
  50
  51                 level = dimensionAssociativity.length;
  52         }
  53         public Associativity(int level, int dimensionAssociativity)
  54         {
  55                 this.dimensionAssociativity = dimensionAssociativity;
  56                 this.level = level;
  57         }
  58
  59         @Override
  60         public int hashCode() {
  61                 return dimensionAssociativity;
  62         }
  63
  64         @Override
  65         public boolean equals(Object obj) {
  66         if (obj == null) return false;
  67         if (!(obj.getClass().equals(this.getClass()))) return false;
  68         Associativity other = (Associativity) obj;
  69                 return dimensionAssociativity == other.dimensionAssociativity;
  70         }
  71
  72         public int getLevel() {
  73                 return level;
  74         }
  75
  76 }