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Tomcat example source code file (Localizer.java)

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

Java - Tomcat tags/keywords

localizer, messageformat, messageformat, missingresourceexception, missingresourceexception, object, object, resourcebundle, string, string, text, throwable, util

The Tomcat Localizer.java source code

/*
 * 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
 * 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 org.apache.jasper.compiler;

import java.text.MessageFormat;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

/**
 * Class responsible for converting error codes to corresponding localized
 * error messages.
 *
 * @author Jan Luehe
 */
public class Localizer {

    private static ResourceBundle bundle = null;
    
    static {
        try {
        bundle = ResourceBundle.getBundle(
            "org.apache.jasper.resources.LocalStrings");
        } catch (Throwable t) {
            t.printStackTrace();
        }
    }

    /*
     * Returns the localized error message corresponding to the given error
     * code.
     *
     * If the given error code is not defined in the resource bundle for
     * localized error messages, it is used as the error message.
     *
     * @param errCode Error code to localize
     * 
     * @return Localized error message
     */
    public static String getMessage(String errCode) {
	String errMsg = errCode;
	try {
	    errMsg = bundle.getString(errCode);
	} catch (MissingResourceException e) {
	}
	return errMsg;
    }

    /* 
     * Returns the localized error message corresponding to the given error
     * code.
     *
     * If the given error code is not defined in the resource bundle for
     * localized error messages, it is used as the error message.
     *
     * @param errCode Error code to localize
     * @param arg Argument for parametric replacement
     *
     * @return Localized error message
     */
    public static String getMessage(String errCode, String arg) {
	return getMessage(errCode, new Object[] {arg});
    }

    /* 
     * Returns the localized error message corresponding to the given error
     * code.
     *
     * If the given error code is not defined in the resource bundle for
     * localized error messages, it is used as the error message.
     *
     * @param errCode Error code to localize
     * @param arg1 First argument for parametric replacement
     * @param arg2 Second argument for parametric replacement
     *
     * @return Localized error message
     */
    public static String getMessage(String errCode, String arg1, String arg2) {
	return getMessage(errCode, new Object[] {arg1, arg2});
    }
    
    /* 
     * Returns the localized error message corresponding to the given error
     * code.
     *
     * If the given error code is not defined in the resource bundle for
     * localized error messages, it is used as the error message.
     *
     * @param errCode Error code to localize
     * @param arg1 First argument for parametric replacement
     * @param arg2 Second argument for parametric replacement
     * @param arg3 Third argument for parametric replacement
     *
     * @return Localized error message
     */
    public static String getMessage(String errCode, String arg1, String arg2,
				    String arg3) {
	return getMessage(errCode, new Object[] {arg1, arg2, arg3});
    }

    /* 
     * Returns the localized error message corresponding to the given error
     * code.
     *
     * If the given error code is not defined in the resource bundle for
     * localized error messages, it is used as the error message.
     *
     * @param errCode Error code to localize
     * @param arg1 First argument for parametric replacement
     * @param arg2 Second argument for parametric replacement
     * @param arg3 Third argument for parametric replacement
     * @param arg4 Fourth argument for parametric replacement
     *
     * @return Localized error message
     */
    public static String getMessage(String errCode, String arg1, String arg2,
				    String arg3, String arg4) {
	return getMessage(errCode, new Object[] {arg1, arg2, arg3, arg4});
    }

    /*
     * Returns the localized error message corresponding to the given error
     * code.
     *
     * If the given error code is not defined in the resource bundle for
     * localized error messages, it is used as the error message.
     *
     * @param errCode Error code to localize
     * @param args Arguments for parametric replacement
     *
     * @return Localized error message
     */
    public static String getMessage(String errCode, Object[] args) {
	String errMsg = errCode;
	try {
	    errMsg = bundle.getString(errCode);
	    if (args != null) {
		MessageFormat formatter = new MessageFormat(errMsg);
		errMsg = formatter.format(args);
	    }
	} catch (MissingResourceException e) {
	}
	
	return errMsg;
    }
}

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