net.bioclipse.model.ImageWriter.java Source code

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Here is the source code for net.bioclipse.model.ImageWriter.java

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/* ***************************************************************************
 * Copyright (c) 2008 Bioclipse Project
 * 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
 *
 *****************************************************************************/

package net.bioclipse.model;

import java.awt.geom.Rectangle2D;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;

import org.apache.batik.dom.GenericDOMImplementation;
import org.apache.batik.svggen.SVGGraphics2D;
import org.apache.batik.svggen.SVGGraphics2DIOException;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Document;

/**
 * Utility class for writing images to file
 * @author Eskil Andersen
 *
 */
public class ImageWriter {

    /**
     * Save image to svg format
     * @param path the path including filename where the image is to be stored
     * @param chart TODO
     */
    public static void saveImageSVG(String path, JFreeChart chart) {
        //First check that we have a valid chart
        if (chart != null) {
            //Create DOM objects
            DOMImplementation domImpl = GenericDOMImplementation.getDOMImplementation();
            Document document = domImpl.createDocument(null, "svg", null);

            //Create an instance of the SVG generator
            SVGGraphics2D svgGenerator = new SVGGraphics2D(document);

            //Setting the precision apparently avoids a NullPointerException in Batik 1.5
            svgGenerator.getGeneratorContext().setPrecision(6);

            //Render chart into SVG Graphics2D impl.
            chart.draw(svgGenerator, new Rectangle2D.Double(0, 0, 400, 300), null);

            //Write to file
            boolean useCSS = true;
            try {
                Writer out = new OutputStreamWriter(new FileOutputStream(new File(path)), "UTF-8");
                svgGenerator.stream(out, useCSS);
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (SVGGraphics2DIOException e) {
                e.printStackTrace();
            }
        }

    }

    public static void saveImageJPG(String path, JFreeChart chart) throws IOException {
        FileOutputStream fos = new FileOutputStream(path);
        ChartUtilities.writeChartAsJPEG(fos, chart, 640, 480);
        fos.close();
    }

    public static void saveImagePNG(String path, JFreeChart chart) throws IOException {
        FileOutputStream fos = new FileOutputStream(path);
        ChartUtilities.writeChartAsPNG(fos, chart, 640, 480);
        fos.close();
    }

}