// Copyright (c) Keith D Gregory, all rights reserved
package com.kdgregory.example.xml.xpath;

import java.io.StringReader;

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathFactory;

import org.w3c.dom.Document;

import org.xml.sax.InputSource;


public class CompiledXPathExample
{
    public static void main(String[] argv) throws Exception
    {
        String xml = "<foo>"
                   + "    <bar name='argle'>"
                   +          "Argle"
                   + "    </bar>"
                   + "    <bar name='bargle'>"
                   +          "Bargle"
                   + "        <baz>Baz</baz>"
                   + "    </bar>"
                   + "</foo>";

        Document dom = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(new InputSource(new StringReader(xml)));
        XPath xpath = XPathFactory.newInstance().newXPath();
        XPathExpression expr = xpath.compile("/foo/bar/baz");

        String result = expr.evaluate(dom);
        System.out.println("selected content: \"" + result + "\"");
    }
}