gcc/libjava/java/text/Collator.java

131 lines
3.0 KiB
Java

// Collator.java - Locale-sensitive string comparison.
/* Copyright (C) 1999 Red Hat, Inc.
This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
package java.text;
import java.io.Serializable;
import java.util.Locale;
import java.util.MissingResourceException;
import java.util.ResourceBundle;
/**
* @author Tom Tromey <tromey@cygnus.com>
* @date March 18, 1999
*/
/* Written using "Java Class Libraries", 2nd edition, plus online
* API docs for JDK 1.2 from http://www.javasoft.com.
* Status: Mostly complete, but parts stubbed out. Look for FIXME.
*/
public abstract class Collator implements Cloneable, Serializable
{
public static final int NO_DECOMPOSITION = 0;
public static final int CANONICAL_DECOMPOSITION = 1;
public static final int FULL_DECOMPOSITION = 2;
public static final int PRIMARY = 0;
public static final int SECONDARY = 1;
public static final int TERTIARY = 2;
public static final int IDENTICAL = 3;
protected Collator ()
{
strength = TERTIARY;
decmp = CANONICAL_DECOMPOSITION;
}
public abstract int compare (String source, String target);
public boolean equals (Object obj)
{
if (! (obj instanceof Collator))
return false;
Collator c = (Collator) obj;
return decmp == c.decmp && strength == c.strength;
}
public boolean equals (String source, String target)
{
return compare (source, target) == 0;
}
public static synchronized Locale[] getAvailableLocales ()
{
// FIXME.
return null;
}
public abstract CollationKey getCollationKey (String source);
public synchronized int getDecomposition ()
{
return decmp;
}
public static Collator getInstance ()
{
return getInstance (Locale.getDefault());
}
public static Collator getInstance (Locale loc)
{
ResourceBundle res;
String pattern;
try
{
res = ResourceBundle.getBundle("gnu.gcj.text.LocaleData", loc);
pattern = res.getString("collatorRule");
}
catch (MissingResourceException x)
{
return null;
}
try
{
return new RuleBasedCollator (pattern);
}
catch (ParseException x)
{
return null;
}
}
public synchronized int getStrength ()
{
return strength;
}
public abstract int hashCode ();
public synchronized void setDecomposition (int mode)
{
if (mode != NO_DECOMPOSITION
&& mode != CANONICAL_DECOMPOSITION
&& mode != FULL_DECOMPOSITION)
throw new IllegalArgumentException ();
decmp = mode;
}
public synchronized void setStrength (int strength)
{
if (strength != PRIMARY && strength != SECONDARY
&& strength != TERTIARY && strength != IDENTICAL)
throw new IllegalArgumentException ();
this.strength = strength;
}
// Decompose a single character and append results to the buffer.
protected native final void decomposeCharacter (char c, StringBuffer buf);
// These names are fixed by the serialization spec.
protected int decmp;
protected int strength;
}