Examples of java.text.RuleBasedCollator$CollationElement

java.text.RuleBasedCollator
This class describes what rank has a character (or a sequence of characters) in the lexicographic order. Each element in a rule has a collation element.

            m_sorter = new PageSorter( HumanComparator.DEFAULT_HUMAN_COMPARATOR );
        }
        else
            try
            {
                Collator collator = new RuleBasedCollator( order );
                collator.setStrength( Collator.PRIMARY );
                m_sorter = new PageSorter( new CollatorComparator( collator ) );
            }
            catch( ParseException pe )
            {
                log.info( "Failed to parse requested collator - using default ordering", pe );

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            // StringDataValue returned for (V AS CLOB) should consider the 
            // passed collation type in determining whether we should
            // generate SQLChar vs CollatorSQLChar for instance. Keep in mind
            // that collation applies only to character string types.
            try {
                RuleBasedCollator rbs = ConnectionUtil.getCurrentLCC().getDataValueFactory().
                getCharacterCollator(targetCollationType);
                result = ((StringDataValue)result).getValue(rbs);
            }
            catch( java.sql.SQLException sqle)
            {

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    //If we are dealing with territory based collation and returnDVD is 
    //of type StringDataValue, then we need to return a StringDataValue   
    //with territory based collation.
    if (returnDVD instanceof StringDataValue) {
      try {
        RuleBasedCollator rbs = ConnectionUtil.getCurrentLCC().getDataValueFactory().
        getCharacterCollator(typeDescriptor.getCollationType());
        return ((StringDataValue)returnDVD).getValue(rbs);
      }
      catch( java.sql.SQLException sqle)
      {

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     * RESOLVE - unfinished LIKE test with dataset of all unicode characters
     **/
    private static final void printRuleBasedCollator()
    {
        // get en_US Collator rules
        RuleBasedCollator en_USCollator = 
            (RuleBasedCollator)Collator.getInstance(Locale.US);
        String en_rules = en_USCollator.getRules();


        System.out.println("ENGLISH RULES: " + en_rules);
        System.out.println("ENGLISH RULES: " + formatString(en_rules, true));
        System.out.println("ENGLISH RULES: " + formatString(en_rules, false));
    }

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        while (lastNonspaceChar > 0 && 
               rawData[lastNonspaceChar - 1] == '\u0020')
            lastNonspaceChar--;         // count off the trailing spaces.


        RuleBasedCollator rbc = getCollatorForCollation();      
        cKey = rbc.getCollationKey(new String(rawData, 0, lastNonspaceChar));


        return cKey;
    }

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      if (!localeFound)
      throw StandardException.newException(
          SQLState.COLLATOR_NOT_FOUND_FOR_LOCALE, 
          databaseLocale.toString());
      
      RuleBasedCollator collator = (RuleBasedCollator)Collator.getInstance(databaseLocale);


    if (strength != -1)
      collator.setStrength(strength);


    return collator;
    }

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  private Collator createFromRules(String fileName, ResourceLoader loader) throws IOException {
    InputStream input = null;
    try {
     input = loader.openResource(fileName);
     String rules = toUTF8String(input);
     return new RuleBasedCollator(rules);
    } catch (ParseException e) {
      // invalid rules
      throw new IOException("ParseException thrown while parsing rules", e);
    } finally {
      IOUtils.closeWhileHandlingException(input);

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   *
   * The default is DIN 5007-1, this shows how to tailor a collator to get DIN 5007-2 behavior.
   *  http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4423383
   */
  public void testCustomRules() throws Exception {
    RuleBasedCollator baseCollator = (RuleBasedCollator) Collator.getInstance(new Locale("de", "DE"));


    String DIN5007_2_tailorings =
      "& ae , a\u0308 & AE , A\u0308"+
      "& oe , o\u0308 & OE , O\u0308"+
      "& ue , u\u0308 & UE , u\u0308";


    RuleBasedCollator tailoredCollator = new RuleBasedCollator(baseCollator.getRules() + DIN5007_2_tailorings);
    String tailoredRules = tailoredCollator.getRules();
    //
    // at this point, you would save these tailoredRules to a file, 
    // and use the custom parameter.
    //
    String germanUmlaut = "Töne";

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        doTest(comp);
    }




    public void testRuleComparator() {
        RuleBasedCollator comp = (RuleBasedCollator)RuleBasedCollator.getInstance();
        doTest(comp);
    }

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        doTest(comp);
    }




    public void testRuleComparator() {
        RuleBasedCollator comp = (RuleBasedCollator)RuleBasedCollator.getInstance();
        doTest(comp);
    }

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