package xpathCheck;

import org.dom4j.Document;
import org.dom4j.io.SAXReader;

public class XPathCheck {

	public static void main(String[] args) {

		boolean xmlMissingTagYieldsNullValue = true; // KETTLE_XML_MISSING_TAG_YIELDS_NULL_VALUE=Y を模す  

		String filePath = "D:\\pleiades\\sampledata\\Sample.xml";
		String xpathExpression = "count(/root/employees/employee)";
		
        	SAXReader rdr = new SAXReader()	;
        	String nodeValue;
		
        	try {
                    Document doc = rdr.read(filePath);

        	    // 暫定的な修正例
                    nodeValue = doc.valueOf(xpathExpression);
                    if((xmlMissingTagYieldsNullValue)&&(nodeValue.length() == 0)) nodeValue = null;

                    System.out.println("XPath: " + xpathExpression);
                    System.out.println("Node Value: " + nodeValue);

                } catch (Exception e) {
                    e.printStackTrace();
                }

	}
}