code 17.2.4.txt

开发web_xml

import java.io.IOException;
import com.ibm.xml.parser.TXElement;
import com.ibm.xml.parsers.TXRevalidatingDOMParser;
import org.xml.sax.SAXException;
import org.w3c.dom.Document;
import org.w3c.dom.Node;

public class RevalidateSample {
    public static void main(String args[]) {
        String xmlFile = "input_file_URL";
        TXRevalidatingDOMParser parser = new TXRevalidatingDOMParser();
             try {
            parser.parse(xmlFile);          
        } catch (SAXException se) {
            System.out.println("SAX error while parsing: caught "+se.getMessage());
            se.printStackTrace();
        } catch (IOException ioe) {
            System.out.println("I/O Error while parsing: caught "+ioe);
            ioe.printStackTrace();
        }

        Document doc = parser.getDocument();
        
        System.out.println("Doing initial validation");
        Node position = parser.validate(doc.getDocumentElement());
        if (position == null) {
            System.out.println("ok.");
        } else {
            System.out.println("Invalid at " + position);
            System.out.println(position.getNodeName());
        }
        // Now insert dirty data
        Node junk = new TXElement("invalid_node");
        Node corruptee = doc.getDocumentElement();
        System.out.println("Corrupting: "+corruptee.getNodeName());
        corruptee.insertBefore(junk,corruptee.getFirstChild().getNextSibling());
        
        System.out.println("Doing post-corruption validation");
        position = parser.validate(doc.getDocumentElement());
        if (position == null) {
            System.out.println("ok.");
        } else {
            System.out.println("Invalid at " + position);
            System.out.println(position.getNodeName());
        }

    }
}