com.github.dandelion.datatables.extras.struts1.i18n.Struts1MessageResolver Maven / Gradle / Ivy

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/*
 * [The "BSD licence"]
 * Copyright (c) 2012 Dandelion
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 3. Neither the name of Dandelion nor the names of its contributors 
 * may be used to endorse or promote products derived from this software 
 * without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.github.dandelion.datatables.extras.struts1.i18n;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.PageContext;

import org.apache.struts.Globals;
import org.apache.struts.config.ModuleConfig;
import org.apache.struts.util.MessageResources;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.github.dandelion.core.i18n.AbstractMessageResolver;
import com.github.dandelion.core.i18n.MessageResolver;
import com.github.dandelion.core.util.StringUtils;

/**
 * 
 * Struts1 implementation of the {@link MessageResolver}.
 * 
 * 
 * @author Thibault Duchateau
 * @since 0.9.1
 */
public class Struts1MessageResolver extends AbstractMessageResolver {

   private static Logger logger = LoggerFactory.getLogger(Struts1MessageResolver.class);

   public Struts1MessageResolver(HttpServletRequest request) {
      super(request);
   }

   @Override
   public String getResource(String messageKey, String defaultValue, Object... params) {

      String message = null;
      PageContext pageContext = null;

      // I'm still so ashamed about that...
      pageContext = (PageContext) params[0];

      // Both title and titleKey attributes are not used
      if (messageKey == null || StringUtils.isBlank(messageKey) && StringUtils.isNotBlank(defaultValue)) {
         message = StringUtils.capitalize(defaultValue);
      }
      // The titleKey attribute is used
      else {
         MessageResources resources = (MessageResources) pageContext.getAttribute(Globals.MESSAGES_KEY,
               PageContext.REQUEST_SCOPE);

         if (resources == null) {
            ModuleConfig moduleConfig = (ModuleConfig) pageContext.getRequest().getAttribute(Globals.MODULE_KEY);

            if (moduleConfig == null) {
               moduleConfig = (ModuleConfig) pageContext.getServletContext().getAttribute(Globals.MODULE_KEY);
               pageContext.getRequest().setAttribute(Globals.MODULE_KEY, moduleConfig);
            }

            resources = (MessageResources) pageContext.getAttribute(Globals.MESSAGES_KEY + moduleConfig.getPrefix(),
                  PageContext.APPLICATION_SCOPE);
         }

         if (resources == null) {
            resources = (MessageResources) pageContext
                  .getAttribute(Globals.MESSAGES_KEY, PageContext.APPLICATION_SCOPE);
         }

         if (resources != null) {
            message = resources.getMessage(messageKey);
         }

         if (StringUtils.isBlank(message)) {
            logger.warn("The bundle hasn't been retrieved. Please check your i18n configuration.");
            message = UNDEFINED_KEY + messageKey + UNDEFINED_KEY;
         }
      }

      return message;
   }
}