org.openmrs.web.servlet.DisplayChartServlet.java Source code

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Here is the source code for org.openmrs.web.servlet.DisplayChartServlet.java

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/**
 * This Source Code Form is subject to the terms of the Mozilla Public License,
 * v. 2.0. If a copy of the MPL was not distributed with this file, You can
 * obtain one at http://mozilla.org/MPL/2.0/. OpenMRS is also distributed under
 * the terms of the Healthcare Disclaimer located at http://openmrs.org/license.
 *
 * Copyright (C) OpenMRS Inc. OpenMRS is a registered trademark and the OpenMRS
 * graphic logo is a trademark of OpenMRS Inc.
 */
package org.openmrs.web.servlet;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.jfree.chart.JFreeChart;

/**
 * Servlet for rendering a 3D piechart of categories and values width: Width of the generated image
 * height: Height of the generated image mimeType: Accepts either image/png or image/jpeg
 * chartTitle: The title of the graph
 */
public class DisplayChartServlet extends AbstractGraphServlet {

    public static final long serialVersionUID = 1231232L;

    private Log log = LogFactory.getLog(DisplayChartServlet.class);

    public static final String SERVLET_NAME = "displayChartServlet";

    public static final String CHART_KEY = "chartKey";

    protected JFreeChart createChart(HttpServletRequest request, HttpServletResponse response) {

        String key = request.getParameter(CHART_KEY);

        HttpSession session = request.getSession();
        Object o = session.getAttribute(key);

        if (o == null) {
            log.error("Unable to find chart in session with key: " + key);
        }

        return (JFreeChart) o;

    }
}