/*
    * Copyright 2011 FatWire Corporation. All Rights Reserved.
    *
    * 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 com.fatwire.gst.foundation.controller.support;
  
  import javax.servlet.ServletContext;
  
  import org.apache.commons.logging.Log;
  import org.springframework.util.Assert;
  import org.springframework.web.context.WebApplicationContext;
  import org.springframework.web.context.support.WebApplicationContextUtils;
  
  import com.fatwire.gst.foundation.controller.AppContext;
  import com.fatwire.gst.foundation.controller.action.ActionNameResolver;
  import com.fatwire.gst.foundation.controller.action.support.NullActionNameResolver;
  import com.fatwire.gst.foundation.facade.logging.LogUtil;
  
  public class SpringWebAppContext implements AppContext {
      protected static final Log LOG = LogUtil.getLog(SpringWebAppContext.class);
      private static final ActionNameResolver nullActionNameResolver = new NullActionNameResolver();
      private final WebApplicationContext wac;
  
      /**
       * This constructor is needed for the {@link WebAppContextLoader}. 
       * 
       * @param ctx
       * @param app
       */
      public SpringWebAppContext(ServletContext ctx, AppContext app) {
          this.wac = WebApplicationContextUtils.getRequiredWebApplicationContext(ctx);
          Assert.notNull(wac);
  
      }
  
      @SuppressWarnings("unchecked")
      @Override
      public <T> T getBean(String name, Class<T> t) {
          T bean = null;
          if (wac.containsBean(name)) {
              bean = (T) wac.getBean(name, t);
              if (LOG.isTraceEnabled()) {
                  LOG.trace("Using " + name + " as configured in spring: " + bean.getClass().getName());
              }
          } else {
              LOG.debug("Cannot find the '" + name + "' bean in the Spring WebApplicationContext: " + wac.toString());
              try {
                  bean = TemplateMethodFactory.createByMethod(this, t);
              } catch (final Exception e) {
                  LOG.debug(e.getMessage() + " while trying to create  a" + t.getName());
              }
          }
          return bean;
      }
  
      public ActionNameResolver createActionNameResolver() {
          return nullActionNameResolver;
      }
  
      @Override
      public void init() {
          // TODO Auto-generated method stub
  
      }
  
  }