de.topicmapslab.majortom.server.admin.interceptor.LayoutInterceptor.java Source code

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Here is the source code for de.topicmapslab.majortom.server.admin.interceptor.LayoutInterceptor.java

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/*******************************************************************************
 * Copyright 2011 Hannes Niederhausen, Topic Maps Lab
 * 
 * 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 de.topicmapslab.majortom.server.admin.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

/**
 * @author niederhausen
 *
 */
public class LayoutInterceptor extends HandlerInterceptorAdapter {
    private static final String NO_LAYOUT = "noLayout:";

    private String layoutView;

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
            ModelAndView modelAndView) throws Exception {
        super.postHandle(request, response, handler, modelAndView);
        if (modelAndView == null)
            return;

        String originalView = modelAndView.getViewName();

        if (originalView != null) {
            includeLayout(modelAndView, originalView);
        }
    }

    private void includeLayout(ModelAndView modelAndView, String originalView) {
        boolean noLayout = originalView.startsWith(NO_LAYOUT);

        String realViewName = (noLayout) ? originalView.substring(NO_LAYOUT.length()) : originalView;

        if (noLayout) {
            modelAndView.setViewName(realViewName);
        } else {
            modelAndView.addObject("view", realViewName);
            modelAndView.setViewName(layoutView);
        }
    }

    /**
     * Returns the name of the layout view
     * @return
     */
    public String getLayoutView() {
        return layoutView;
    }

    /**
     * Sets the name of the layout view
     * @param layoutView
     */
    public void setLayoutView(String layoutView) {
        this.layoutView = layoutView;
    }
}