I18NUtils.java

/*
 * (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and others.
 *
 * 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.
 *
 * Contributors:
 *     Nuxeo - initial API and implementation
 *
 * $Id: I18NUtils.java 19046 2007-05-21 13:03:50Z sfermigier $
 */

package org.nuxeo.common.utils.i18n;

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

/**
 * Utility methods for translations.
 */
public final class I18NUtils {

    // Utility class.
    private I18NUtils() {
    }

    static ClassLoader getCurrentClassLoader(Object defaultObject) {
        ClassLoader loader = Thread.currentThread().getContextClassLoader();
        if (loader == null) {
            loader = defaultObject.getClass().getClassLoader();
        }
        return loader;
    }

    public static String getMessageString(String bundleName, String key, Object[] params, Locale locale)
            throws MissingResourceException {

        String text;

        ResourceBundle bundle = ResourceBundle.getBundle(bundleName, locale, getCurrentClassLoader(params));

        try {
            text = bundle.getString(key);
        } catch (MissingResourceException e) {
            text = key;
        }

        if (params != null && params.length != 0) {
            MessageFormat mf = new MessageFormat(text, locale);
            text = mf.format(params, new StringBuffer(), null).toString();
        }

        return text;
    }

}