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 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
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package com.sun.org.apache.xerces.internal.impl.xs;

import com.sun.org.apache.xerces.internal.util.MessageFormatter;
import com.sun.org.apache.xerces.internal.utils.SecuritySupport;
import java.util.Locale;
import java.util.MissingResourceException;
import java.util.ResourceBundle;


SchemaMessageProvider implements an XMLMessageProvider that
provides localizable error messages for the W3C XML Schema Language
Author:
Elena Litani, IBM
@xerces.internal
/**
 * SchemaMessageProvider implements an XMLMessageProvider that
 * provides localizable error messages for the W3C XML Schema Language
 *
 * @xerces.internal
 *
 * @author Elena Litani, IBM
 */
public class XSMessageFormatter implements MessageFormatter {
    
The domain of messages concerning the XML Schema: Structures specification.
/**
     * The domain of messages concerning the XML Schema: Structures specification.
     */
    public static final String SCHEMA_DOMAIN = "http://www.w3.org/TR/xml-schema-1";


    // private objects to cache the locale and resource bundle
    private Locale fLocale = null;
    private ResourceBundle fResourceBundle = null;

    
Formats a message with the specified arguments using the given
locale information.
Params:
locale –    The locale of the message.
key –       The message key.
arguments – The message replacement text arguments. The order
                 of the arguments must match that of the placeholders
                 in the actual message.
Throws:
MissingResourceException – Thrown if the message with the
                                 specified key cannot be found.
Returns:
Returns the formatted message./**
     * Formats a message with the specified arguments using the given
     * locale information.
     *
     * @param locale    The locale of the message.
     * @param key       The message key.
     * @param arguments The message replacement text arguments. The order
     *                  of the arguments must match that of the placeholders
     *                  in the actual message.
     *
     * @return Returns the formatted message.
     *
     * @throws MissingResourceException Thrown if the message with the
     *                                  specified key cannot be found.
     */
     public String formatMessage(Locale locale, String key, Object[] arguments)
        throws MissingResourceException {

        if (fResourceBundle == null || locale != fLocale) {
            if (locale != null) {
                fResourceBundle = SecuritySupport.getResourceBundle("com.sun.org.apache.xerces.internal.impl.msg.XMLSchemaMessages", locale);
                // memorize the most-recent locale
                fLocale = locale;
            }
            if (fResourceBundle == null)
                fResourceBundle = SecuritySupport.getResourceBundle("com.sun.org.apache.xerces.internal.impl.msg.XMLSchemaMessages");
        }

        String msg = fResourceBundle.getString(key);
        if (arguments != null) {
            try {
                msg = java.text.MessageFormat.format(msg, arguments);
            } catch (Exception e) {
                msg = fResourceBundle.getString("FormatFailed");
                msg += " " + fResourceBundle.getString(key);
            }
        }

        if (msg == null) {
            msg = fResourceBundle.getString("BadMessageKey");
            throw new MissingResourceException(msg, "com.sun.org.apache.xerces.internal.impl.msg.SchemaMessages", key);
        }

        return msg;
    }
}