fr.paris.lutece.plugins.form.web.DoDownloadGraph.java Source code

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Here is the source code for fr.paris.lutece.plugins.form.web.DoDownloadGraph.java

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/*
 * Copyright (c) 2002-2014, Mairie de Paris
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice
 *     and the following disclaimer.
 *
 *  2. Redistributions in binary form must reproduce the above copyright notice
 *     and the following disclaimer in the documentation and/or other materials
 *     provided with the distribution.
 *
 *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
 *     contributors may be used to endorse or promote products derived from
 *     this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * License 1.0
 */
package fr.paris.lutece.plugins.form.web;

import com.keypoint.PngEncoder;

import fr.paris.lutece.plugins.form.business.EntryHome;
import fr.paris.lutece.plugins.form.business.GraphType;
import fr.paris.lutece.plugins.form.business.GraphTypeHome;
import fr.paris.lutece.plugins.form.business.IEntry;
import fr.paris.lutece.plugins.form.business.ResponseHome;
import fr.paris.lutece.plugins.form.business.StatisticEntrySubmit;
import fr.paris.lutece.portal.service.plugin.Plugin;
import fr.paris.lutece.portal.service.plugin.PluginService;
import fr.paris.lutece.portal.service.util.AppLogService;

import org.jfree.chart.ChartRenderingInfo;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.entity.StandardEntityCollection;

import java.awt.image.BufferedImage;

import java.util.List;

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

/**
 *
 *  class DoDownloadGraph
 *
 */
public class DoDownloadGraph {
    private static final String PARAMETER_ID_ENTRY = "id_entry";
    private static final String PARAMETER_ID_GRAPH_TYPE = "id_graph_type";
    private static final String PARAMETER_GRAPH_THREE_DIMENSION = "graph_three_dimension";
    private static final String PARAMETER_GRAPH_LABEL_VALUE = "graph_label_value";
    private static final String PARAMETER_PLUGIN_NAME = "plugin_name";
    private static final String EMPTY_STRING = "";

    /**
     * Write in the http response the statistic graph of a question
     * @param request the http request
     * @param response The http response
     *
     */
    public void doGenerateGraph(HttpServletRequest request, HttpServletResponse response) {
        JFreeChart chart = null;
        Plugin plugin = null;
        IEntry entry;
        GraphType graphType = null;
        int nIdEntry = -1;
        int nIdGraphType = -1;

        String strIdEntry = request.getParameter(PARAMETER_ID_ENTRY);
        String strIdGraphType = request.getParameter(PARAMETER_ID_GRAPH_TYPE);
        String strPluginName = request.getParameter(PARAMETER_PLUGIN_NAME);
        String strGraphThreeDimension = request.getParameter(PARAMETER_GRAPH_THREE_DIMENSION);
        String strGraphLabelValue = request.getParameter(PARAMETER_GRAPH_LABEL_VALUE);

        boolean nGraphThreeDimension = false;
        boolean nGraphLabelValue = false;

        if ((strGraphThreeDimension != null) && strGraphThreeDimension.equals("1")) {
            nGraphThreeDimension = true;
        }

        if ((strGraphLabelValue != null) && strGraphLabelValue.equals("1")) {
            nGraphLabelValue = true;
        }

        if ((strIdEntry != null) && !strIdEntry.equals(EMPTY_STRING) && (strIdGraphType != null)
                && !strIdGraphType.equals(EMPTY_STRING) && (strPluginName != null)
                && !strPluginName.equals(EMPTY_STRING)) {
            plugin = PluginService.getPlugin(strPluginName);

            try {
                nIdEntry = Integer.parseInt(strIdEntry);
                nIdGraphType = Integer.parseInt(strIdGraphType);
            } catch (NumberFormatException ne) {
                AppLogService.error(ne);
            }

            entry = EntryHome.findByPrimaryKey(nIdEntry, plugin);

            List<StatisticEntrySubmit> listStatistic = ResponseHome.getStatisticByIdEntry(nIdEntry, plugin);
            graphType = GraphTypeHome.findByPrimaryKey(nIdGraphType, plugin);

            if (graphType != null) {
                chart = graphType.createChart(listStatistic, entry.getTitle(), nGraphThreeDimension,
                        nGraphLabelValue);
            }

            try {
                ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());
                BufferedImage chartImage = chart.createBufferedImage(600, 200, info);
                response.setContentType("image/PNG");

                PngEncoder encoder = new PngEncoder(chartImage, false, 0, 9);
                response.getOutputStream().write(encoder.pngEncode());
                response.getOutputStream().close();
            } catch (Exception e) {
                AppLogService.error(e);
            }
        }
    }
}