1 /*
2 * Copyright 1998-2002 Sun Microsystems, Inc. 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. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 package javax.swing.text.html.parser;
27
28 import javax.swing.text.html.HTMLEditorKit;
29 import java.io.BufferedInputStream;
30 import java.io.IOException;
31 import java.io.InputStream;
32 import java.io.DataInputStream;
33 import java.io.ObjectInputStream;
34 import java.io.Reader;
35 import java.io.Serializable;
36 import java.lang.reflect.Method;
37
38 /**
39 * Responsible for starting up a new DocumentParser
40 * each time its parse method is invoked. Stores a
41 * reference to the dtd.
42 *
43 * @author Sunita Mani
44 */
45
46 public class ParserDelegator extends HTMLEditorKit.Parser implements Serializable {
47
48 private static DTD dtd = null;
49
50 protected static synchronized void setDefaultDTD() {
51 if (dtd == null) {
52 DTD _dtd = null;
53 // (PENDING) Hate having to hard code!
54 String nm = "html32";
55 try {
56 _dtd = DTD.getDTD(nm);
57 } catch (IOException e) {
58 // (PENDING) UGLY!
59 System.out.println("Throw an exception: could not get default dtd: " + nm);
60 }
61 dtd = createDTD(_dtd, nm);
62 }
63 }
64
65 protected static DTD createDTD(DTD dtd, String name) {
66
67 InputStream in = null;
68 boolean debug = true;
69 try {
70 String path = name + ".bdtd";
71 in = getResourceAsStream(path);
72 if (in != null) {
73 dtd.read(new DataInputStream(new BufferedInputStream(in)));
74 dtd.putDTDHash(name, dtd);
75 }
76 } catch (Exception e) {
77 System.out.println(e);
78 }
79 return dtd;
80 }
81
82
83 public ParserDelegator() {
84 if (dtd == null) {
85 setDefaultDTD();
86 }
87 }
88
89 public void parse(Reader r, HTMLEditorKit.ParserCallback cb, boolean ignoreCharSet) throws IOException {
90 new DocumentParser(dtd).parse(r, cb, ignoreCharSet);
91 }
92
93 /**
94 * Fetch a resource relative to the ParserDelegator classfile.
95 * If this is called on 1.2 the loading will occur under the
96 * protection of a doPrivileged call to allow the ParserDelegator
97 * to function when used in an applet.
98 *
99 * @param name the name of the resource, relative to the
100 * ParserDelegator class.
101 * @returns a stream representing the resource
102 */
103 static InputStream getResourceAsStream(String name) {
104 try {
105 return ResourceLoader.getResourceAsStream(name);
106 } catch (Throwable e) {
107 // If the class doesn't exist or we have some other
108 // problem we just try to call getResourceAsStream directly.
109 return ParserDelegator.class.getResourceAsStream(name);
110 }
111 }
112
113 private void readObject(ObjectInputStream s)
114 throws ClassNotFoundException, IOException {
115 s.defaultReadObject();
116 if (dtd == null) {
117 setDefaultDTD();
118 }
119 }
120 }
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