Mercurial > hg > graal-compiler

comparison visualizer/BatikSVGProxy/src/com/sun/hotspot/igv/svg/BatikSVG.java @ 4512:015fb895586b

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Moved visualizer to new directory.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Tue, 07 Feb 2012 22:41:09 +0100
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4511:6cb549627941 4512:015fb895586b
1 /*
2 * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24 package com.sun.hotspot.igv.svg;
25
26 import java.awt.Graphics2D;
27 import java.io.Writer;
28 import java.lang.reflect.Constructor;
29 import java.lang.reflect.InvocationTargetException;
30 import java.lang.reflect.Method;
31 import org.w3c.dom.DOMImplementation;
32
33 /**
34 * Utility class
35 * @author Thomas Wuerthinger
36 */
37 public class BatikSVG {
38
39 private BatikSVG() {
40 }
41
42 private static Constructor SVGGraphics2DConstructor;
43 private static Method streamMethod;
44 private static Method createDefaultMethod;
45 private static Method getDOMImplementationMethod;
46 private static Method setEmbeddedFontsOnMethod;
47 private static Class<?> classSVGGraphics2D;
48
49 /**
50 * Creates a graphics object that allows to be exported to SVG data using the {@link #printToStream(Graphics2D, Writer, boolean) printToStream} method.
51 * @return the newly created Graphics2D object or null if the library does not exist
52 */
53 public static Graphics2D createGraphicsObject() {
54 try {
55 if (SVGGraphics2DConstructor == null) {
56 ClassLoader cl = BatikSVG.class.getClassLoader();
57 Class<?> classGenericDOMImplementation = cl.loadClass("org.apache.batik.dom.GenericDOMImplementation");
58 Class<?> classSVGGeneratorContext = cl.loadClass("org.apache.batik.svggen.SVGGeneratorContext");
59 classSVGGraphics2D = cl.loadClass("org.apache.batik.svggen.SVGGraphics2D");
60 getDOMImplementationMethod = classGenericDOMImplementation.getDeclaredMethod("getDOMImplementation", new Class[0]);
61 createDefaultMethod = classSVGGeneratorContext.getDeclaredMethod("createDefault", new Class[]{org.w3c.dom.Document.class});
62 setEmbeddedFontsOnMethod = classSVGGeneratorContext.getDeclaredMethod("setEmbeddedFontsOn", new Class[]{boolean.class});
63 streamMethod = classSVGGraphics2D.getDeclaredMethod("stream", Writer.class, boolean.class);
64 SVGGraphics2DConstructor = classSVGGraphics2D.getConstructor(classSVGGeneratorContext, boolean.class);
65 }
66 DOMImplementation dom = (DOMImplementation) getDOMImplementationMethod.invoke(null);
67 org.w3c.dom.Document document = dom.createDocument("http://www.w3.org/2000/svg", "svg", null);
68 Object ctx = createDefaultMethod.invoke(null, document);
69 setEmbeddedFontsOnMethod.invoke(ctx, true);
70 Graphics2D svgGenerator = (Graphics2D) SVGGraphics2DConstructor.newInstance(ctx, true);
71 return svgGenerator;
72 } catch (ClassNotFoundException e) {
73 return null;
74 } catch (NoSuchMethodException e) {
75 return null;
76 } catch (IllegalAccessException e) {
77 return null;
78 } catch (InvocationTargetException e) {
79 return null;
80 } catch (InstantiationException e) {
81 return null;
82 }
83 }
84
85 /**
86 * Serializes a graphics object to a stream in SVG format.
87 * @param svgGenerator the graphics object. Only graphics objects created by the {@link #createGraphicsObject() createGraphicsObject} method are valid.
88 * @param stream the stream to which the data is written
89 * @param useCSS whether to use CSS styles in the SVG output
90 */
91 public static void printToStream(Graphics2D svgGenerator, Writer stream, boolean useCSS) {
92 assert classSVGGraphics2D != null;
93 assert classSVGGraphics2D.isInstance(svgGenerator);
94 try {
95 streamMethod.invoke(svgGenerator, stream, useCSS);
96 } catch (IllegalAccessException e) {
97 assert false;
98 } catch (InvocationTargetException e) {
99 assert false;
100 }
101 }
102 }