bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/map/Associativity.java

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