com.spt.evt.view.PartialRenderingTilesView.java Source code

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Here is the source code for com.spt.evt.view.PartialRenderingTilesView.java

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/*
 * Copyright 2004-2008 the original author or authors.
 *
 * 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.spt.evt.view;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

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

import org.apache.tiles.Attribute;
import org.apache.tiles.Definition;
import org.apache.tiles.context.TilesRequestContext;
import org.apache.tiles.context.TilesRequestContextFactory;
import org.apache.tiles.impl.BasicTilesContainer;
import org.apache.tiles.servlet.context.ServletTilesRequestContextFactory;
import org.apache.tiles.servlet.context.ServletUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.servlet.support.JstlUtils;
import org.springframework.web.servlet.support.RequestContext;
import org.springframework.web.servlet.view.tiles2.TilesView;

import com.spt.evt.Utils.AjaxUtils;

/**
 * Detects htmlFormat=nolayout and renders the selected Tiles definition without the surrounding layout.
 */
public class PartialRenderingTilesView extends TilesView {
    private static final Logger logger = LoggerFactory.getLogger(AjaxUtils.class);

    private TilesRequestContextFactory tilesRequestContextFactory;

    public void afterPropertiesSet() throws Exception {
        super.afterPropertiesSet();
        tilesRequestContextFactory = new ServletTilesRequestContextFactory();
        tilesRequestContextFactory.init(new HashMap());
    }

    protected void renderMergedOutputModel(Map model, HttpServletRequest request, HttpServletResponse response)
            throws Exception {

        ServletContext servletContext = getServletContext();
        if ("nolayout".equals(request.getParameter("htmlFormat"))) {

            BasicTilesContainer container = (BasicTilesContainer) ServletUtil.getCurrentContainer(request,
                    servletContext);
            if (container == null) {
                throw new ServletException("Tiles container is not initialized. "
                        + "Have you added a TilesConfigurer to your web application context?");
            }

            exposeModelAsRequestAttributes(model, request);
            JstlUtils.exposeLocalizationContext(new RequestContext(request, servletContext));

            TilesRequestContext tilesRequestContext = tilesRequestContextFactory
                    .createRequestContext(container.getApplicationContext(), new Object[] { request, response });
            Definition compositeDefinition = container.getDefinitionsFactory().getDefinition(getUrl(),
                    tilesRequestContext);

            Iterator<String> iterator = compositeDefinition.getAttributeNames();
            while (iterator.hasNext()) {
                String attributeName = (String) iterator.next();
                Attribute attribute = compositeDefinition.getAttribute(attributeName);
                if (attribute.getValue() == null || !(attribute.getValue() instanceof String)) {
                    continue;
                }
                container.startContext(request, response).inheritCascadedAttributes(compositeDefinition);
                container.render(attribute, request, response);
                container.endContext(request, response);
            }
        } else {
            super.renderMergedOutputModel(model, request, response);
        }
    }

}