Examples of java.text.Collator

java.text.Collator
are two strings in the default locale Collator myCollator = Collator.getInstance(); if( myCollator.compare("abc", "ABC") < 0 ) System.out.println("abc is less than ABC"); else System.out.println("abc is greater than or equal to ABC");
You can set a Collator's strength property to determine the level of difference considered significant in comparisons. Four strengths are provided: PRIMARY, SECONDARY, TERTIARY, and IDENTICAL. The exact assignment of strengths to language features is locale dependant. For example, in Czech, "e" and "f" are considered primary differences, while "e" and "ě" are secondary differences, "e" and "E" are tertiary differences and "e" and "e" are identical. The following shows how both case and accents could be ignored for US English.
```
 //Get the Collator for US English and set its strength to PRIMARY Collator usCollator = Collator.getInstance(Locale.US); usCollator.setStrength(Collator.PRIMARY); if( usCollator.compare("abc", "ABC") == 0 ) { System.out.println("Strings are equivalent"); } 
```
For comparing Strings exactly once, the compare method provides the best performance. When sorting a list of Strings however, it is generally necessary to compare each String multiple times. In this case, CollationKeys provide better performance. The CollationKey class converts a String to a series of bits that can be compared bitwise against other CollationKeys. A CollationKey is created by a Collator object for a given String.
Note: CollationKeys from different Collators can not be compared. See the class description for {@link CollationKey}for an example using CollationKeys. @see RuleBasedCollator @see CollationKey @see CollationElementIterator @see Locale @version 1.46, 07/23/06 @author Helena Shih, Laura Werner, Richard Gillam

        }
        else if (s2 == null) {
            return 1;
        }
        else {
            Collator c = (Collator)collators.get(locale);
            if (c == null) {
                c = Collator.getInstance(locale);
                c.setDecomposition(LocaleSupport.decompositionFlag(locale));
                collators.put(locale, c);
            }
            return c.compare(s1, s2);
        }
    }

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   * @return  Comparator for sorting hits.
   * @throws IOException If an error occurs reading the index.
   */
  static ScoreDocComparator comparatorStringLocale (final IndexReader reader, final String fieldname, final Locale locale)
  throws IOException {
    final Collator collator = Collator.getInstance (locale);
    final String field = fieldname.intern();
    final String[] index = FieldCache.DEFAULT.getStrings (reader, field);
    return new ScoreDocComparator() {


      public final int compare(final ScoreDoc i, final ScoreDoc j) {
      String is = index[i.doc];
      String js = index[j.doc];
      if (is == js) {
        return 0;
      } else if (is == null) {
        return -1;
      } else if (js == null) {
        return 1;
      } else {
        return collator.compare(is, js);
      }
    }


      public Comparable sortValue (final ScoreDoc i) {
        return index[i.doc];

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  }




  Comparator comparatorStringLocale(final String fieldName,
      Locale locale) {
    final Collator collator = Collator.getInstance(locale);
    return new ShardComparator(fieldName) {
      public final int compare(final Object o1, final Object o2) {
        ShardDoc sd1 = (ShardDoc) o1;
        ShardDoc sd2 = (ShardDoc) o2;
        Comparable v1 = (Comparable)sortVal(sd1);
        Comparable v2 = (Comparable)sortVal(sd2);
        if (v1==v2)
          return 0;
        if (v1==null)
          return 1;
        if(v2==null)
          return -1;
        return -collator.compare(v1,v2);
      }
    };
  }

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    public List<GWTJahiaNode> searchSQL(String searchString, int limit, List<String> nodeTypes, List<String> mimeTypes,
                                        List<String> filters, List<String> fields,boolean sortOnDisplayName) throws GWTJahiaServiceException {
        List<GWTJahiaNode> gwtJahiaNodes = search.searchSQL(searchString, limit, nodeTypes, mimeTypes, filters, fields,
                retrieveCurrentSession());
        if (sortOnDisplayName) {
            final Collator collator = Collator.getInstance(retrieveCurrentSession().getLocale());
            Collections.sort(gwtJahiaNodes, new Comparator<GWTJahiaNode>() {
                public int compare(GWTJahiaNode o1, GWTJahiaNode o2) {
                    return collator.compare(o1.getDisplayName(), o2.getDisplayName());
                }
            });
        }
        return gwtJahiaNodes;
    }

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     * @return the result of the comparison
     * @see java.util.Comparator#compare(Object, Object)
     */
    public int compare( Principal o1, Principal o2 )
    {
        Collator collator = Collator.getInstance();
        return collator.compare( o1.getName(), o2.getName() );
    }

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            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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      /***/


   }
   public int compare( String content, String facetValue ){
      Locale    loc       = Locale.getDefault();
      Collator  collator  = Collator.getInstance( loc );
      return collator.compare( content, facetValue );
   }

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    }




    public int compare( String value1, String value2 ) {
        Locale    loc       = Locale.getDefault();
        Collator  collator  = Collator.getInstance( loc );
        return collator.compare( value1, value2 );
    }

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        }
    }


    public int compare( String content, String facetValue ){
        Locale    loc       = Locale.getDefault();
        Collator  collator  = Collator.getInstance( loc );
        return collator.compare( content, facetValue );
    }

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     *            the source string to compare with this string
     */
    public int collate(String source) {
        if (source == null)
            data_RaiseNilOperandExcpt();
        Collator myCollator = Collator.getInstance();
        return myCollator.compare(source, theString.toString());
    }

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