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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
package org.ietf.ldap;
import java.util.*;
import java.io.*;
/**
* This class represents a locale-specific resource for a property file.
* It retrieves the property file for the given base name including the
* absolute path name and locale. The property file has to be located in the
* CLASSPATH and the property file's suffix is .props.
* <p>
* If the specified locale is en and us and the base name of the file is
* netscape/ldap/errors/ErrorCodes, then the class loader will search for
* the file in the following order:
* <pre>
*
* ErrorCodes_en_us.properties
* ErrorCodes_en.properties
* ErrorCodes.properties
*
* </pre>
* @see java.util.Locale
*/
class LDAPResourceBundle implements java.io.Serializable {
static final long serialVersionUID = -5903986665461157980L;
private static final boolean _debug = false;
private static final String _suffix = ".properties";
private static final String _locale_separator = "_";
/**
* Return the property resource bundle according to the base name of the
* property file and the locale. The class loader will find the closest match
* with the given locale.
* @return the property resource bundle.
* @exception IOException Gets thrown when failed to open the resource
* bundle file.
*/
static PropertyResourceBundle getBundle( String baseName )
throws IOException {
return getBundle( baseName, Locale.getDefault() );
}
/**
* Return the property resource bundle according to the base name of the
* property file and the locale. The class loader will find the closest match
* with the given locale.
* @param baseName the base name of the property file. The base name contains
* no locale context and no . suffix.
* @param l the locale
* @return the property resource bundle.
* @exception IOException Gets thrown when failed to create a property
* resource
*/
static PropertyResourceBundle getBundle( String baseName, Locale l )
throws IOException {
String localeStr = _locale_separator + l.toString();
InputStream fin = null;
while ( true ) {
if ( (fin = getStream(baseName, localeStr)) != null ) {
PropertyResourceBundle p = new PropertyResourceBundle( fin );
return p;
} else {
int index = localeStr.lastIndexOf( _locale_separator );
if ( index == -1 ) {
printDebug( "File " + baseName + localeStr + _suffix +
" not found" );
return null;
} else {
localeStr = localeStr.substring( 0, index );
}
}
}
}
/**
* Constructs the whole absolute path name of a property file and retrieves
* an input stream on the file.
* @param baseName the base name of the property file. The base name contains
* no locale context and no . suffix.
* @param the locale string to insert into the file name
* @return the input stream of the property file.
*/
private static InputStream getStream( String baseName, String locale ) {
String fStr = baseName + locale + _suffix;
return ClassLoader.getSystemResourceAsStream( fStr );
}
/**
* Prints debug messages if the debug mode is on.
* @param str the message that is printed
*/
private static void printDebug(String str) {
if ( _debug ) {
System.out.println( str );
}
}
}
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