FacesMessageUtil.java

package com.wcs.newsletter.util;

/*
 * #%L
 * Webstar Newsletter
 * %%
 * Copyright (C) 2013 Webstar Csoport Kft.
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the 
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public 
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #L%
 */

import java.text.MessageFormat;
import java.util.ResourceBundle;
import javax.faces.application.FacesMessage;
import javax.faces.context.FacesContext;
import com.liferay.faces.util.logging.Logger;
import com.liferay.faces.util.logging.LoggerFactory;

public class FacesMessageUtil {

    private static final Logger logger = LoggerFactory.getLogger(FacesMessageUtil.class);
    private static ResourceBundle resourceBundle;

    public static void addErrorMessage(FacesContext facesContext, String clientId, String key, Object[] args) {
        addMessage(facesContext, clientId, FacesMessage.SEVERITY_ERROR, key, args);
    }

    public static void addGlobalErrorMessage(FacesContext facesContext, String key, Object[] args) {
        String clientId = null;
        addErrorMessage(facesContext, clientId, key, args);
    }

    public static void addGlobalInfoMessage(FacesContext facesContext, String key, Object[] args) {
        String clientId = null;
        addInfoMessage(facesContext, clientId, key, args);
    }

    public static void addGlobalInfoMessage(FacesContext facesContext, String key, Object arg) {
        addGlobalInfoMessage(facesContext, key, new Object[]{arg});
    }

    public static void addGlobalSuccessInfoMessage(FacesContext facesContext) {
        String key = "your-request-processed-successfully";
        Object[] args = null;
        addGlobalInfoMessage(facesContext, key, args);
    }

    public static void addGlobalUnexpectedErrorMessage(FacesContext facesContext) {
        String key = "an-unexpected-error-occurred";
        Object[] args = null;
        addGlobalErrorMessage(facesContext, key, args);
    }

    public static void addInfoMessage(FacesContext facesContext, String clientId, String key, Object[] args) {
        addMessage(facesContext, clientId, FacesMessage.SEVERITY_INFO, key, args);
    }

    public static void addMessage(FacesContext facesContext, String clientId, FacesMessage.Severity severity,
            String key, Object[] args) {
        String message = getMessage(key, args);
        FacesMessage facesMessage = new FacesMessage(severity, message, message);
        facesContext.addMessage(clientId, facesMessage);
    }

    public static String getMessage(String key, Object[] args) {
        String message = key;

        try {

            if (resourceBundle == null) {
                resourceBundle = ResourceBundle.getBundle("i18n");
            }

            message = resourceBundle.getString(key);

            if (args != null) {
                message = MessageFormat.format(message, args);
            }
        } catch (Exception e) {
            logger.error(e.getMessage(), e);
        }

        return message;
    }
}