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annotate visualizer/BatikSVGProxy/src/com/sun/hotspot/igv/svg/BatikSVG.java @ 11954:905c26108117

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removed warning
author Doug Simon <doug.simon@oracle.com>
date Thu, 10 Oct 2013 12:05:39 +0200
parents 015fb895586b
children
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1 /*
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2 * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24 package com.sun.hotspot.igv.svg;
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25
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26 import java.awt.Graphics2D;
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27 import java.io.Writer;
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28 import java.lang.reflect.Constructor;
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29 import java.lang.reflect.InvocationTargetException;
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30 import java.lang.reflect.Method;
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31 import org.w3c.dom.DOMImplementation;
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32
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33 /**
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34 * Utility class
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35 * @author Thomas Wuerthinger
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36 */
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37 public class BatikSVG {
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38
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39 private BatikSVG() {
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40 }
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41
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42 private static Constructor SVGGraphics2DConstructor;
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43 private static Method streamMethod;
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44 private static Method createDefaultMethod;
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45 private static Method getDOMImplementationMethod;
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46 private static Method setEmbeddedFontsOnMethod;
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47 private static Class<?> classSVGGraphics2D;
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48
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49 /**
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50 * Creates a graphics object that allows to be exported to SVG data using the {@link #printToStream(Graphics2D, Writer, boolean) printToStream} method.
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51 * @return the newly created Graphics2D object or null if the library does not exist
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52 */
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53 public static Graphics2D createGraphicsObject() {
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54 try {
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55 if (SVGGraphics2DConstructor == null) {
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56 ClassLoader cl = BatikSVG.class.getClassLoader();
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57 Class<?> classGenericDOMImplementation = cl.loadClass("org.apache.batik.dom.GenericDOMImplementation");
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58 Class<?> classSVGGeneratorContext = cl.loadClass("org.apache.batik.svggen.SVGGeneratorContext");
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59 classSVGGraphics2D = cl.loadClass("org.apache.batik.svggen.SVGGraphics2D");
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60 getDOMImplementationMethod = classGenericDOMImplementation.getDeclaredMethod("getDOMImplementation", new Class[0]);
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61 createDefaultMethod = classSVGGeneratorContext.getDeclaredMethod("createDefault", new Class[]{org.w3c.dom.Document.class});
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62 setEmbeddedFontsOnMethod = classSVGGeneratorContext.getDeclaredMethod("setEmbeddedFontsOn", new Class[]{boolean.class});
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63 streamMethod = classSVGGraphics2D.getDeclaredMethod("stream", Writer.class, boolean.class);
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64 SVGGraphics2DConstructor = classSVGGraphics2D.getConstructor(classSVGGeneratorContext, boolean.class);
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65 }
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66 DOMImplementation dom = (DOMImplementation) getDOMImplementationMethod.invoke(null);
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67 org.w3c.dom.Document document = dom.createDocument("http://www.w3.org/2000/svg", "svg", null);
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68 Object ctx = createDefaultMethod.invoke(null, document);
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69 setEmbeddedFontsOnMethod.invoke(ctx, true);
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70 Graphics2D svgGenerator = (Graphics2D) SVGGraphics2DConstructor.newInstance(ctx, true);
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71 return svgGenerator;
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72 } catch (ClassNotFoundException e) {
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73 return null;
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74 } catch (NoSuchMethodException e) {
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75 return null;
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76 } catch (IllegalAccessException e) {
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77 return null;
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78 } catch (InvocationTargetException e) {
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79 return null;
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80 } catch (InstantiationException e) {
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81 return null;
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82 }
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83 }
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84
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85 /**
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86 * Serializes a graphics object to a stream in SVG format.
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87 * @param svgGenerator the graphics object. Only graphics objects created by the {@link #createGraphicsObject() createGraphicsObject} method are valid.
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88 * @param stream the stream to which the data is written
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89 * @param useCSS whether to use CSS styles in the SVG output
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90 */
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91 public static void printToStream(Graphics2D svgGenerator, Writer stream, boolean useCSS) {
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92 assert classSVGGraphics2D != null;
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93 assert classSVGGraphics2D.isInstance(svgGenerator);
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94 try {
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95 streamMethod.invoke(svgGenerator, stream, useCSS);
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96 } catch (IllegalAccessException e) {
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97 assert false;
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98 } catch (InvocationTargetException e) {
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99 assert false;
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100 }
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101 }
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102 }