blob: ccce944472c50203c0026c0543ccfb667fb82bb7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
/*
* Copyright (C) 2001 The Apache Software Foundation. All rights reserved.
* For details on use and redistribution please refer to the
* LICENSE file included with these sources."
*/
package org.apache.fop.apps;
import java.lang.reflect.*;
// Imported SAX classes
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
// Imported java.io classes
import java.io.*;
// FOP
import org.apache.fop.messaging.MessageHandler;
import org.apache.fop.tools.xslt.XSLTransform;
/**
* XSLTInputHandler basically takes an xmlfile and transforms it with an xsltfile
* and the resulting xsl:fo document is input for Fop.
*/
public class XSLTInputHandler extends InputHandler {
File xmlfile, xsltfile;
boolean useOldTransform = false;
public XSLTInputHandler (File xmlfile, File xsltfile ) {
this.xmlfile = xmlfile;
this.xsltfile = xsltfile;
}
/**
* overwrites the method of the super class to return the xmlfile
*/
public InputSource getInputSource () {
if (useOldTransform) {
try {
java.io.Writer writer;
java.io.Reader reader;
File tmpFile = null;
// create a Writer
// the following is an ugly hack to allow processing of larger files
// if xml file size is larger than 500 kb write the fo:file to disk
if ((xmlfile.length()) > 500000) {
tmpFile = new File(xmlfile.getName()+".fo.tmp");
writer = new FileWriter(tmpFile);
} else {
writer = new StringWriter();
}
XSLTransform.transform(xmlfile.getCanonicalPath(), xsltfile.getCanonicalPath(), writer);
writer.flush();
writer.close();
if (tmpFile != null) {
reader = new FileReader(tmpFile);
} else {
// create a input source containing the xsl:fo file which can be fed to Fop
reader = new StringReader(writer.toString());
}
return new InputSource(reader);
}
catch (Exception ex) {
ex.printStackTrace();
return null;
}
}
else {
return fileInputSource(xmlfile);
}
}
/**
* This looks to see if the Trax api is supported and uses that to
* get an XMLFilter. Otherwise, it falls back to using DOM documents
*
*/
public XMLReader getParser()
throws FOPException
{
XMLReader result = null;
try {
// try trax first
Class transformer = Class.forName("javax.xml.transform.Transformer");
transformer = Class.forName("org.apache.fop.apps.TraxInputHandler");
Class[] argTypes = { File.class, File.class };
Method getFilterMethod = transformer.getMethod("getXMLFilter",argTypes);
File[] args = {xmlfile, xsltfile};
Object obj = getFilterMethod.invoke(null,args);
if (obj instanceof XMLReader) {
result = (XMLReader)obj;
}
}
catch (ClassNotFoundException ex){
throw new FOPException(ex);
}
catch (InvocationTargetException ex) {
throw new FOPException(ex);
}
catch (IllegalAccessException ex) {
throw new FOPException(ex);
}
catch (NoSuchMethodException ex) {
throw new FOPException(ex);
}
// otherwise, use DOM documents via our XSLTransform tool class old style
if (result == null) {
useOldTransform = true;
result = createParser();
}
return result;
}
}
|
