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At John Cowan's recommendation
(http://lists.xml.org/archives/xml-dev/200209/msg00631.html), I've tried XOM
and I like what I see. A lot. It's easy to learn, and it was easy to get it
to do the things I wanted it to do without any fuss. My gut reaction is that
XOM is going to be a genuine evolution of previous APIs. Three cheers to the
MWTFN.
If you are interested and want an on-ramp, I've written a very quick micro
tutorial. It assumes that you are comfortable with Java. Here ya go:
1. Have a modern version of Java installed on your system. I used J2SE v1.4
when testing this tutorial. If you don't have modern Java, get it at
http://java.sun.com.
2. Make a working directory. Download XOM.jar there. Get it at
http://cafeconleche.org/XOM/XOM.jar.
3. Paste the following program in a file and save it as Date.java in your
working directory:
import nu.xom.Document;
import nu.xom.Element;
import nu.xom.Attribute;
public class Date {
public static void main(String[] args) {
Element date = new Element("date");
date.add(new Attribute("type", "ISO"));
Element year = new Element("year");
Element month = new Element("month");
Element day = new Element("day");
date.appendChild("\n ");
date.appendChild(year);
date.appendChild("\n ");
date.appendChild(month);
date.appendChild("\n ");
date.appendChild(day);
date.appendChild("\n");
year.appendChild("2002");
month.appendChild("09");
day.appendChild("20");
Document doc = new Document(date);
String result = doc.getStringForm();
System.out.println(result);
}
}
Pretty easy to figure out what's going, isn't it? Nothing arcane. I created
this program out of the little program from the fledgling XOM tutorial. See
it at http://cafeconleche.org/XOM/tutorial.xhtml. (I had to change the file
extension from .xhtml to .html on a local copy to get IE on Win2k to read
it.)
4. Now compile it:
javac -classpath XOM.jar Date.java
This of course assumes XOM.jar is in your working directory.
5. Run it:
java -cp .;XOM.jar Date
6. You'll get the following on standard output:
<?xml version="1.0"?>
<date type="ISO">
<year>2002</year>
<month>09</month>
<day>20</day>
</date>
7. Now you are hooked. Have a look at the JavaDocs at
http://cafeconleche.org/XOM/doc/ for clues on what to do next, start
hacking, and have fun.
If you have problems with this little tutorial, let me know and I'll post
corrections.
Happy Friday,
Mike
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