package xpathCheck;

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

public class XPathCheck {

	public static void main(String[] args) {

		boolean xmlMissingTagYieldsNullValue = false; // KETTLE_XML_MISSING_TAG_YIELDS_NULL_VALUE=N を模す※デフォルト  

		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);

        	    // KETTLE_XML_MISSING_TAG_YIELDS_NULL_VALUE 問題処理の再現
        	    if(xmlMissingTagYieldsNullValue)
        	    {
            		nodeValue = doc.selectSingleNode(xpathExpression) != null ? doc.valueOf(xpathExpression) : null;
        	    }
        	    else
        	    {
            		nodeValue = doc.valueOf(xpathExpression);	
        	    }

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

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

        }
}