org.directwebremoting.util.Messages Maven / Gradle / Ivy

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DWR is easy Ajax for Java. It makes it simple to call Java code directly from Javascript. It gets rid of almost all the boiler plate code between the web browser and your Java code.
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/*
 * Copyright 2005 Joe Walker
 *
 * 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 org.directwebremoting.util;

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

/**
 * Internationalization for DWR
 * @author Joe Walker [joe at getahead dot ltd dot uk]
 */
public class Messages
{
    /**
     * Prevent instansiation
     */
    private Messages()
    {
    }

    /**
     * Internationalize a simple string
     * @param key The lookup key
     * @return The internationalized version of the key
     */
    public static String getString(String key)
    {
        try
        {
            return RESOURCE_BUNDLE.getString(key);
        }
        catch (MissingResourceException ex)
        {
            log.error("Missing I18N string: " + key, ex);
            return '!' + key + '!';
        }
    }

    /**
     * Internationalize a parameterized string
     * @param key The lookup key
     * @param param Lookup parameter number 1
     * @return The internationalized version of the key
     */
    public static String getString(String key, Object param)
    {
        return getString(key, new Object[] { param, });
    }

    /**
     * Internationalize a parameterized string
     * @param key The lookup key
     * @param param1 Lookup parameter number 1
     * @param param2 Lookup parameter number 2
     * @return The internationalized version of the key
     */
    public static String getString(String key, Object param1, Object param2)
    {
        return getString(key, new Object[] { param1, param2, });
    }

    /**
     * Internationalize a parameterized string
     * @param key The lookup key
     * @param param1 Lookup parameter number 1
     * @param param2 Lookup parameter number 2
     * @param param3 Lookup parameter number 3
     * @return The internationalized version of the key
     */
    public static String getString(String key, Object param1, Object param2, Object param3)
    {
        return getString(key, new Object[] { param1, param2, param3, });
    }

    /**
     * Internationalize a parameterized string
     * @param key The lookup key
     * @param param1 Lookup parameter number 1
     * @param param2 Lookup parameter number 2
     * @param param3 Lookup parameter number 3
     * @param param4 Lookup parameter number 4
     * @return The internationalized version of the key
     */
    public static String getString(String key, Object param1, Object param2, Object param3, Object param4)
    {
        return getString(key, new Object[] { param1, param2, param3, param4, });
    }

    /**
     * Internationalize a parameterized string
     * @param key The lookup key
     * @param params
     * @return The internationalized version of the key
     */
    public static String getString(String key, Object[] params)
    {
        try
        {
            String format = RESOURCE_BUNDLE.getString(key);
            return MessageFormat.format(format, params);
        }
        catch (MissingResourceException ex)
        {
            // Create a list of the parameters
            StringBuffer buffer = new StringBuffer();
            buffer.append('[');
            for (int i = 0; i < params.length; i++)
            {
                if (i != 0)
                {
                    buffer.append(',');
                }
                buffer.append(params[i].toString());
            }
            buffer.append(']');

            log.error("Missing I18N string: " + key + ". Params: " + buffer.toString());
            return '!' + key + '!' + buffer.toString() + '!';
        }
    }

    /**
     * The log stream
     */
    private static final Logger log = Logger.getLogger(Messages.class);

    /**
     * The lookup bundle
     */
    private static final ResourceBundle RESOURCE_BUNDLE = ResourceBundle.getBundle("org.directwebremoting.messages");
}