> I noticed though that with JDK 1.4.2, even when requesting indenting,
> the resulting file is not indented :-(
I have found this to be very implementation dependent, with the version I
used, not setting the indent put every thing on a single line. I'll have
to have a look at the xalan/xerces source code to see what is going on.
Steve
Dominique Devienne <[EMAIL PROTECTED]>
18/12/2003 16:53
Please respond to "Ant Developers List"
To: Steven Murphy/DSD/LONDON/[EMAIL PROTECTED], "'Ant Developers
List '"
<[EMAIL PROTECTED]>
cc:
Subject: RE: Bug 25564 - CVS tagdiff does not escape XML
characters
Thanks Steven! Interesting ;-)
Included below is my own twist on the technique you demonstated
that allows to encapsulate the SAX/TrAX code. Clients just
implement the XmlContentProvider, probably as an anonymous inner
class at the same time as calling XmlWriter.write().
I noticed though that with JDK 1.4.2, even when requesting indenting,
the resulting file is not indented :-(
package com.lgc.buildmagic.util;
import java.io.File;
import java.io.Writer;
import java.io.OutputStream;
import java.io.IOException;
// SAX classes
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.ContentHandler;
import org.xml.sax.helpers.AttributesImpl;
import org.xml.sax.helpers.XMLFilterImpl;
// TrAX classes
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.stream.StreamResult;
public class XmlWriter {
/** The mirror image of SAX's ContentHandler that writes to a handler.
*/
public interface XmlContentProvider {
void writeTo(ContentHandler to)
throws SAXException;
}
/** Just a dummy impl of the content provider interface above for
testing.
*/
public static class MyProvider
implements XmlContentProvider {
public void writeTo(ContentHandler to)
throws SAXException {
final AttributesImpl attributes = new AttributesImpl();
to.startDocument();
to.startElement("", "history-cache", "history-cache", attributes);
to.startElement("", "entries", "entries", attributes);
to.startElement("", "name", "name", attributes);
String name = "Javah&cache";
to.characters(name.toCharArray(), 0, name.length());
to.endElement("", "name", "name");
to.startElement("", "tag", "tag", attributes);
String tag = "<tag>text</tag>";
to.characters(tag.toCharArray(), 0, tag.length());
to.endElement("", "tag", "tag");
to.endElement("", "entries", "entries");
to.endElement("", "history-cache", "history-cache");
to.endDocument();
}
}
public void write(File file, XmlContentProvider provider)
throws TransformerException {
write(new StreamResult(file), provider);
}
public void write(OutputStream outputStream, XmlContentProvider
provider)
throws TransformerException {
write(new StreamResult(outputStream), provider);
}
public void write(Writer writer, XmlContentProvider provider)
throws TransformerException {
write(new StreamResult(writer), provider);
}
/**
* Writes SAX events sent by an XML provider using an identity
transform.
*
* @param result The stream to write the result of the identity
transform
to.
* @param provider The XML content provider.
*/
private void write(StreamResult result, final XmlContentProvider
provider)
throws TransformerException {
TransformerFactory factory = TransformerFactory.newInstance();
Transformer transformer = factory.newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
XMLFilterImpl reader = new XMLFilterImpl() {
public void parse(InputSource input)
throws IOException,
SAXException {
provider.writeTo(getContentHandler());
}
};
SAXSource source = new SAXSource(reader, new InputSource());
transformer.transform(source, result);
}
public static void main(String[] args)
throws Exception {
new XmlWriter().write(new File("XmlWriter.xml"), new MyProvider());
}
}
-----Original Message-----
From: [EMAIL PROTECTED]
To: Ant Developers List
Sent: 12/18/2003 7:36 AM
Subject: RE: Bug 25564 - CVS tagdiff does not escape XML characters
Hi,
I have attached a file to the bug report.
http://issues.apache.org/bugzilla/show_bug.cgi?id=25564
Steve
Dominique Devienne <[EMAIL PROTECTED]>
17/12/2003 11:14
Please respond to "Ant Developers List"
To: "'Antoine Levy-Lambert '" <[EMAIL PROTECTED]>, "'Ant
Developers List '"
<[EMAIL PROTECTED]>
cc:
Subject: RE: Bug 25564 - CVS tagdiff does not escape XML
characters
From: <[EMAIL PROTECTED]>
> My favoured way of generating XML from a class is to extend
> XMLFilterImpl and fire SAX events to a Transformer with no
> stylesheet and StreamResult of the required output file,
> inspired by Cocoon 2.
Would you care to provide a concrete example please? Thanks, --DD
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