Jasig/WebproxyPortlet

/**
 * Licensed to Apereo under one or more contributor license
 * agreements. See the NOTICE file distributed with this work
 * for additional information regarding copyright ownership.
 * Apereo licenses this file to you 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 the following location:
 *
 *   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 org.jasig.portlet.proxy.mvc.portlet.xslt;

import javax.portlet.PortletPreferences;
import javax.portlet.PortletRequest;

import org.jasig.portlet.proxy.mvc.IViewSelector;
import org.jasig.portlet.proxy.service.IContentRequest;
import org.jasig.portlet.proxy.service.IContentResponse;
import org.jasig.portlet.proxy.service.IContentService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.portlet.ModelAndView;
import org.springframework.web.servlet.view.xslt.XsltView;

/**
 * <p>XsltPortletController class.</p>
 *
 * @author Jen Bourey, jennifer.bourey@gmail.com
 * @version $Id: $Id
 */
@Controller
@RequestMapping("VIEW")
public class XsltPortletController {

    /** Constant <code>CONTENT_LOCATION_KEY="location"</code> */
    protected static final String CONTENT_LOCATION_KEY = "location";
    /** Constant <code>CONTENT_SERVICE_KEY="contentService"</code> */
    protected static final String CONTENT_SERVICE_KEY = "contentService";
    /** Constant <code>MAIN_XSLT_KEY="mainXslt"</code> */
    protected static final String MAIN_XSLT_KEY = "mainXslt";
    /** Constant <code>MOBILE_XSLT_KEY="mobileXslt"</code> */
    protected static final String MOBILE_XSLT_KEY = "mobileXslt";

    protected final Logger log = LoggerFactory.getLogger(this.getClass());

    private ApplicationContext applicationContext;

    /**
     * <p>Setter for the field <code>applicationContext</code>.</p>
     *
     * @param applicationContext a {@link org.springframework.context.ApplicationContext} object
     */
    @Autowired(required = true)
    public void setApplicationContext(ApplicationContext applicationContext) {
        this.applicationContext = applicationContext;
    }

    private IViewSelector viewSelector;

    /**
     * <p>Setter for the field <code>viewSelector</code>.</p>
     *
     * @param viewSelector a {@link org.jasig.portlet.proxy.mvc.IViewSelector} object
     */
    @Autowired(required = true)
    public void setViewSelector(IViewSelector viewSelector) {
        this.viewSelector = viewSelector;
    }

    /**
     * <p>showContent.</p>
     *
     * @param request a {@link javax.portlet.PortletRequest} object
     * @return a {@link org.springframework.web.portlet.ModelAndView} object
     */
    @RequestMapping
    public ModelAndView showContent(PortletRequest request) {
        final ModelAndView mv = new ModelAndView();

        final PortletPreferences preferences = request.getPreferences();

        // locate the content service to use to retrieve our XML
        final String contentServiceKey = preferences.getValue(CONTENT_SERVICE_KEY, null);
        final IContentService contentService = applicationContext.getBean(contentServiceKey, IContentService.class);
        final IContentRequest proxyRequest = contentService.getRequest(request);

        // retrieve the XML content
        final IContentResponse proxyResponse = contentService.getContent(proxyRequest, request);
        try {
            mv.addObject("xml", proxyResponse.getContent());
            // Note that XsltView closes the stream
        } catch (Exception e) {
            log.error("Problem getting proxy content", e);
            proxyResponse.close();
        }

        // set the appropriate view name
        final String mainXslt = preferences.getValue(MAIN_XSLT_KEY, null);
        final String mobileXslt = preferences.getValue(MOBILE_XSLT_KEY, null);
        final String xslt;
        if (mobileXslt != null) {
            final boolean isMobile = viewSelector.isMobile(request);
            xslt = isMobile ? mobileXslt : mainXslt;
        } else {
            xslt = mainXslt;
        }

        // create an XSLT view using the configured source
        final XsltView view = new XsltView();
        view.setUrl(xslt);
        view.setSourceKey("xml");
        view.setApplicationContext(this.applicationContext);
        mv.setView(view);

        return mv;
    }

}