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Java example source code file (DOMMessageFormatter.java)

This example Java source code file (DOMMessageFormatter.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

badmessagekey, dom_domain, dommessageformatter, formatfailed, locale, missingresourceexception, object, resourcebundle, serializer_domain, string, stringbuffer, unknown, util, xml_domain

The DOMMessageFormatter.java Java example source code

/*
 * reserved comment block
 * DO NOT REMOVE OR ALTER!
 */
/*
 * Copyright 2002,2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


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

/**
 * Used to format DOM error messages, using the system locale.
 *
 * @xerces.internal
 *
 * @author Sandy Gao, IBM
 * @version $Id: DOMMessageFormatter.java,v 1.6 2010-11-01 04:39:38 joehw Exp $
 */
public class DOMMessageFormatter {
    public static final String DOM_DOMAIN = "http://www.w3.org/dom/DOMTR";
    public static final String XML_DOMAIN = "http://www.w3.org/TR/1998/REC-xml-19980210";
    public static final String SERIALIZER_DOMAIN = "http://apache.org/xml/serializer";

    private static ResourceBundle domResourceBundle = null;
    private static ResourceBundle xmlResourceBundle = null;
    private static ResourceBundle serResourceBundle = null;
    private static Locale locale = null;


    DOMMessageFormatter(){
        locale = Locale.getDefault();
    }
    /**
     * Formats a message with the specified arguments using the given
     * locale information.
     *
     * @param domain    domain from which error string is to come.
     * @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          the formatted message.
     *
     * @throws MissingResourceException Thrown if the message with the
     *                                  specified key cannot be found.
     */
    public static String formatMessage(String domain,
    String key, Object[] arguments)
    throws MissingResourceException {
        ResourceBundle resourceBundle = getResourceBundle(domain);
        if(resourceBundle == null){
            init();
            resourceBundle = getResourceBundle(domain);
            if(resourceBundle == null)
                throw new MissingResourceException("Unknown domain" + domain, null, key);
        }
        // format message
        String msg;
        try {
            msg = key + ": " + resourceBundle.getString(key);
            if (arguments != null) {
                try {
                    msg = java.text.MessageFormat.format(msg, arguments);
                }
                catch (Exception e) {
                    msg = resourceBundle.getString("FormatFailed");
                    msg += " " + resourceBundle.getString(key);
                }
            }
        } // error
        catch (MissingResourceException e) {
            msg = resourceBundle.getString("BadMessageKey");
            throw new MissingResourceException(key, msg, key);
        }

        // no message
        if (msg == null) {
            msg = key;
            if (arguments.length > 0) {
                StringBuffer str = new StringBuffer(msg);
                str.append('?');
                for (int i = 0; i < arguments.length; i++) {
                    if (i > 0) {
                        str.append('&');
                    }
                    str.append(String.valueOf(arguments[i]));
                }
            }
        }

        return msg;
    }

    static ResourceBundle getResourceBundle(String domain){
        if(domain == DOM_DOMAIN || domain.equals(DOM_DOMAIN))
            return domResourceBundle;
        else if( domain == XML_DOMAIN || domain.equals(XML_DOMAIN))
            return xmlResourceBundle;
        else if(domain == SERIALIZER_DOMAIN || domain.equals(SERIALIZER_DOMAIN))
            return serResourceBundle;
        return null;
    }
    /**
     * Initialize Message Formatter.
     */
    public static void init(){
        if (locale != null) {
            domResourceBundle = SecuritySupport.getResourceBundle("com.sun.org.apache.xerces.internal.impl.msg.DOMMessages", locale);
            serResourceBundle = SecuritySupport.getResourceBundle("com.sun.org.apache.xerces.internal.impl.msg.XMLSerializerMessages", locale);
            xmlResourceBundle = SecuritySupport.getResourceBundle("com.sun.org.apache.xerces.internal.impl.msg.XMLMessages", locale);
        }else{
            domResourceBundle = SecuritySupport.getResourceBundle("com.sun.org.apache.xerces.internal.impl.msg.DOMMessages");
            serResourceBundle = SecuritySupport.getResourceBundle("com.sun.org.apache.xerces.internal.impl.msg.XMLSerializerMessages");
            xmlResourceBundle = SecuritySupport.getResourceBundle("com.sun.org.apache.xerces.internal.impl.msg.XMLMessages");
        }
    }

    /**
     * setLocale to be used by the formatter.
     * @param locale
     */
    public static void setLocale(Locale dlocale){
        locale = dlocale;
    }
}

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