XOM API for Processing XML with Java

[Geet Gangwar <geetgangwar AT gmail.com>]

Hi,

I have a requirement of processing large XML files of about 4GB. I am using
the NUX distribution to process the files.
But when I fire a Xquery to this read this file, I get JAVA Heap Space
error.

I am using 64bit JDK1.6 and also I have increased the JVM size to 5 GB by
-Xmx5G.

Please help me how to solve this problem.

I am pasting my sample code also.

String path = "/xbrli:xbrl/";
             Map prefixes = new HashMap();
             prefixes.put("xbrli", "http://www.xbrl.org/2003/instance";);
             prefixes.put("link", "http://www.xbrl.org/2003/linkbase";);
             prefixes.put("xlink", "http://www.w3.org/1999/xlink";);
             prefixes.put("xsd", "http://www.w3.org/2001/XMLSchema";);

             StreamingTransform myTransform = new StreamingTransform() {
                 private Nodes NONE = new Nodes();

                 // execute XQuery against each element matching location
path
                 public Nodes transform(Element subtree) {
                     Nodes results = XQueryUtil.xquery(subtree,
"xbrli:context[id = 'c-01']");

                     for (int i=0; i < results.size(); i++) {
                         // do something useful with query results; here we
just print them

System.out.println(XOMUtil.toPrettyXML(results.get(i)));
                     }
                     return NONE; // current subtree becomes subject to
garbage collection
                     // returning empty node list removes current subtree
from document being build.
                     // returning new Nodes(subtree) retains the current
subtree.
                     // returning new Nodes(some other nodes) replaces the
current subtree with
                     // some other nodes.
                     // if you want (SAX) parsing to terminate at this
point, simply throw an exception
                 }
             };

             // parse document with a filtering Builder
             StreamingPathFilter filter = new StreamingPathFilter(path,
prefixes);
             Builder builder = new Builder(filter.createNodeFactory(null,
myTransform));
             Document doc = builder.build(new File("F:/sample/cntxt.xml"));
             System.out.println(doc.getRootElement().getValue());
             System.out.println("doc.size()=" +
doc.getRootElement().getChildCount());
             System.out.println(XOMUtil.toPrettyXML(doc));

Regards

Geet