org.infoglue.deliver.util.charts.ChartHelper.java Source code

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Here is the source code for org.infoglue.deliver.util.charts.ChartHelper.java

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/* ===============================================================================
 *
 * Part of the InfoGlue Content Management Platform (www.infoglue.org)
 *
 * ===============================================================================
 *
 *  Copyright (C)
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License version 2, as published by the
 * Free Software Foundation. See the file LICENSE.html for more information.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY, including the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc. / 59 Temple
 * Place, Suite 330 / Boston, MA 02111-1307 / USA.
 *
 * ===============================================================================
 */

package org.infoglue.deliver.util.charts;

import java.io.File;

import org.apache.log4j.Logger;
import org.infoglue.cms.util.CmsPropertyHandler;
import org.infoglue.deliver.controllers.kernel.impl.simple.TemplateController;
import org.jfree.chart.ChartUtilities;

/**
 * @author Mattias Bogeblad
 *
 * This is the helper class for charts. It gives the user a possibility to 
 * invoke different charts and supply data.
 */

public class ChartHelper {
    private final static Logger logger = Logger.getLogger(ChartHelper.class.getName());

    private TemplateController templateController = null;

    /**
     * The default constructor.
     */

    public ChartHelper(TemplateController templateController) {
        this.templateController = templateController;
    }

    /**
     * This method invokes a named chart with the data supplied in xml-format.
     */

    public String renderGraph(String chartName, String dataAsXML, int width, int height) {
        String assetUrl = "";

        try {
            XMLDataDiagram demo = null;

            if (chartName.equals("TimeSeriesDiagram")) {
                demo = new TimeSeriesDiagram();
                demo.setDiagramData(dataAsXML);
                demo.renderChart();
            } else {
                //Todo - for now...
                demo = new TimeSeriesDiagram();
                demo.setDiagramData(dataAsXML);
                demo.renderChart();
            }

            String uniqueId = chartName + width + height + dataAsXML.length();
            String fileName = uniqueId + ".png";

            int i = 0;
            String filePath = CmsPropertyHandler.getDigitalAssetPath0();
            File file = null;
            while (filePath != null) {
                file = new File(filePath + java.io.File.separator + fileName);
                ChartUtilities.saveChartAsPNG(file, demo.getChart(), width, height);
                i++;
                filePath = CmsPropertyHandler.getProperty("digitalAssetPath." + i);
            }

            /*
            String filePath = CmsPropertyHandler.getDigitalAssetPath();
            File file = new File(filePath + java.io.File.separator + fileName);
            ChartUtilities.saveChartAsPNG(file, demo.getChart(), width, height);
            */

            assetUrl = this.templateController.getDigitalAssetBaseUrl() + "/" + file.getName();
        } catch (Exception e) {
            logger.warn("An error occurred when we tried to generate a graph:" + e.getMessage(), e);
        }

        return assetUrl;
    }

}