libjava/java/text/CollationElementIterator.java

   1 // CollationElementIterator.java - Iterate over decomposed characters.
   2
   3 /* Copyright (C) 1999  Free Software Foundation
   4
   5    This file is part of libgcj.
   6
   7 This software is copyrighted work licensed under the terms of the
   8 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   9 details.  */
  10
  11 package java.text;
  12
  13 /**
  14  * @author Tom Tromey <tromey@cygnus.com>
  15  * @date March 25, 1999
  16  */
  17 /* Written using "Java Class Libraries", 2nd edition, plus online
  18  * API docs for JDK 1.2 from http://www.javasoft.com.
  19  * Status: Believed complete and correct to JDK 1.1.
  20  */
  21
  22 public final class CollationElementIterator
  23 {
  24   public static final int NULLORDER = 0xffffffff;
  25
  26   public int next ()
  27   {
  28     if (index == text.length())
  29       return NULLORDER;
  30     return collator.ceiNext(this);
  31   }
  32
  33   // This one returns int while the others return short.
  34   public static final int primaryOrder (int order)
  35   {
  36     // From the JDK 1.2 spec.
  37     return order >>> 16;
  38   }
  39
  40   public void reset ()
  41   {
  42     index = 0;
  43   }
  44
  45   public static final short secondaryOrder (int order)
  46   {
  47     // From the JDK 1.2 spec.
  48     return (order >>> 8) & 255;
  49   }
  50
  51   public static final short tertiaryOrder (int order)
  52   {
  53     // From the JDK 1.2 spec.
  54     return order & 255;
  55   }
  56
  57   // Non-public constructor.
  58   CollationElementIterator (String text, RuleBasedCollator collator)
  59   {
  60     this.text = text;
  61     this.index = 0;
  62     this.lookahead_set = false;
  63     this.lookahead = 0;
  64     this.collator = collator;
  65   }
  66
  67   // Text over which we iterate.
  68   String text;
  69
  70   // Index of next character to examine in TEXT.
  71   int index;
  72
  73   // A piece of lookahead.
  74   boolean lookahead_set;
  75   int lookahead;
  76
  77   // The RuleBasedCollator which created this object.
  78   RuleBasedCollator collator;
  79 }