Oracle Database 11g Building Oracle XML DB Applications

Processing XPath in Java

Let’s look at how to perform streaming XPath-based XML content evaluation.

The following example calls Oracle XDK to evaluate the XPath expression without building a DOM object in memory. The example only works on a subset of XPath functions and axes (including child, descendant, attribute, text, parent, and ancestor).

Listing 6-3 XPath Evaluation with Oracle XDK Scalable DOM

package xmlbook.chp06;

import java.io.File;

import java.io.FileInputStream;

import java.net.URL;

import javax.xml.xpath.XPath;

import javax.xml.xpath.XPathConstants;

import javax.xml.xpath.XPathFactory;

import oracle.xml.parser.v2.DOMParser;

import oracle.xml.parser.v2.FilePageManager;

import oracle.xml.parser.v2.XMLDocument;

import oracle.xml.scalable.BinaryStream; ...