org.remus.marketplace.servlets.PopularListing.java Source code

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Here is the source code for org.remus.marketplace.servlets.PopularListing.java

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/*******************************************************************************
 * Copyright (c) 2010 Tom Seidel, Remus Software
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 *
 * Contributors:
 *     Tom Seidel - initial API and implementation
 *******************************************************************************/
package org.remus.marketplace.servlets;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;

import org.apache.xml.serialize.XMLSerializer;
import org.hibernate.criterion.Order;
import org.hibernate.criterion.Projections;
import org.remus.marketplace.dao.AdvancedCriteria;
import org.remus.marketplace.dao.gen.CategoryDao;
import org.remus.marketplace.dao.gen.NodeDao;
import org.remus.marketplace.entities.Node;
import org.remus.marketplace.xml.Favorite;
import org.remus.marketplace.xml.Marketplace;
import org.remus.marketplace.xml.Popular;
import org.remus.marketplace.xml.XMLBuilder;
import org.springframework.web.HttpRequestHandler;

/**
 * Servlet implementation class CategoryListing
 */

public class PopularListing implements HttpRequestHandler {
    private static final long serialVersionUID = 1L;

    private CategoryDao categoryDao;

    public void setCategoryDao(CategoryDao categoryDao) {
        this.categoryDao = categoryDao;
    }

    private NodeDao nodeDao;

    public void setNodeDao(NodeDao nodeDao) {
        this.nodeDao = nodeDao;
    }

    private String serverPrefix;

    public void setServerPrefix(String serverPrefix) {
        this.serverPrefix = serverPrefix;
    }

    /**
     * @see HttpServlet#HttpServlet()
     */
    public PopularListing() {
        super();
        // TODO Auto-generated constructor stub
    }

    @Override
    public void handleRequest(HttpServletRequest arg0, HttpServletResponse arg1)
            throws ServletException, IOException {
        arg1.setContentType("text/xml");
        try {
            JAXBContext newInstance = JAXBContext.newInstance(Marketplace.class,
                    org.remus.marketplace.xml.Market.class);

            Marketplace marketplace = new Marketplace();

            List<Object> findByCategoriesId = nodeDao.query(new AdvancedCriteria().setMaxResults(10)
                    .setProjection(Projections.projectionList().add(Projections.groupProperty(Node.ID), "dl_node")
                            .add(Projections.alias(Projections.rowCount(), "downloadCount")))
                    .addSubCriteria(new AdvancedCriteria().setAssosication(Node.DOWNLOADS)

                            .addOrder(Order.desc("downloadCount"))));
            boolean favoriteMode = arg0.getParameter("favorites") != null
                    && Boolean.parseBoolean(arg0.getParameter("favorites"));
            Favorite favorite = null;
            Popular popular = null;
            if (favoriteMode) {
                favorite = new Favorite();
                favorite.setCount(findByCategoriesId.size());
            } else {
                popular = new Popular();
                popular.setCount(findByCategoriesId.size());
            }
            for (Object findById : findByCategoriesId) {
                Object[] rs = (Object[]) findById;
                int parseInt = Integer.parseInt(rs[0].toString());
                Node findById2 = nodeDao.findById(parseInt);
                org.remus.marketplace.xml.Node node = XMLBuilder.buildNode(serverPrefix, findById2);
                if (favoriteMode) {
                    favorite.getNode().add(node);
                } else {
                    popular.getNode().add(node);
                }
            }
            if (favoriteMode) {
                marketplace.setFavorites(favorite);
            } else {
                marketplace.setPopular(popular);
            }
            Marshaller createMarshaller = newInstance.createMarshaller();
            XMLSerializer xmlSerializer = XMLBuilder.getXMLSerializer(arg1.getOutputStream());
            createMarshaller.marshal(marketplace, xmlSerializer.asContentHandler());
        } catch (JAXBException e) {
            throw new ServletException(e);
        }

    }
}