Re: XMLSerializer and default namespaces

Iain Shigeoka wrote:

>I've been using the XMLSerializer and really enjoy the API. The only feature
>that I feel would be really helpful is some way to tell the serializer that
>I'd prefer a certain start tag namespace declaration be a default namespace
>declaration rather than have it generate and use a prefix for itself and all
>children.
>
hi,

this is not immediately obvious but you can do it already: set default 
namespace by binding
namespace to prefix that is empty string, see last note in javadoc 
description of :setPrefix():

http://www.xmlpull.org/v1/doc/api/org/xmlpull/v1/XmlSerializer.html#setPrefix(java.lang.String,%20java.lang.String)

and find below a simple sample to demonstrate use of it. - when you run 
this sample
you should see output similar to this:

serializer implementation class is class 
org.xmlpull.mxp1_serializer.MXSerializer
serializer output: <foo 
xmlns="http://examlple.com/sample/namespace">bar</foo>

>The motivation is that some xml apps I deal with use their own, home grown
>xml parsers that aren't namespace aware. So they will often only match the
>bare tag name (prefixes throws them into a tizzy). This is most common with
>J2ME midlets although I've seen some desktop apps doing the same.
>
we all have sometimes to deal with imperfect XML - i can only sympathize 
with you :-)

alek

ps. next verion of XPP3/MXP1 (MXSerializer) will support all optional 
serialzier properties and features  to give greater control on output 
formatting 
(http://xmlpull.org/v1/doc/features.html#serializer-attvalue-use-apostrophe, 
http://xmlpull.org/v1/doc/properties.html#serializer-indentation, 
http://xmlpull.org/v1/doc/properties.html#serializer-line-separator)

ps2. here is example application:

import java.io.IOException;
import java.io.StringReader;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;
import org.xmlpull.v1.XmlSerializer;
import java.io.StringWriter;

public class Example7 {
    public static void main (String args[])
        throws XmlPullParserException, IOException
    {

        XmlPullParserFactory factory = XmlPullParserFactory.newInstance(
            System.getProperty(XmlPullParserFactory.PROPERTY_NAME), null);
            //"org.xmlpull.mxp1.MXParserFactory", null);
        XmlSerializer serializer = factory.newSerializer();
        StringWriter sw = new StringWriter();
        serializer.setOutput(sw);
        System.out.println("serializer implementation class is 
"+serializer.getClass());
        final String SAMPLE_NS = "http://examlple.com/sample/namespace";
        serializer.setPrefix("", SAMPLE_NS);
        serializer.startTag(SAMPLE_NS, "foo");
        serializer.text("bar");
        serializer.endTag(SAMPLE_NS, "foo");
        serializer.endDocument();
        System.out.println("serializer output: "+sw);
    }

}


-- 
"Mr. Pauli, we in the audience are all agreed that your theory is crazy. 
What divides us is whether it is crazy enough to be true." Niels H. D. Bohr



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