import java.io.*;
import java.util.*;
import javax.xml.parsers.*;
import org.w3c.dom.*;
import org.apache.crimson.tree.XmlDocument;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: </p>
 * @author unascribed
 * @version 1.0
 */

public class XMLTest {

  Vector student_Vector;

  private void readXMLFile(String inFile) throws Exception {
    // prepare for parseXML, create DocumentBuilderFactory instance,assgin DocumentBuilder
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    DocumentBuilder db = null;
    try {
      db = dbf.newDocumentBuilder();
    }
    catch (ParserConfigurationException pce) {
      System.err.println(pce);
      System.exit(1);
    }
    Document doc = null;
    try {
      doc = db.parse(inFile);
    }
    catch (DOMException dom) {
      System.err.println(dom.getMessage());
      System.exit(1);
    }
    catch (IOException ioe) {
      System.err.println(ioe);
      System.exit(1);
    }

    //parse XML
    Element root = doc.getDocumentElement();

    NodeList students = root.getElementsByTagName("student");
    for (int i = 0; i < students.getLength(); i++)
    {
      //
      Element student = (Element) students.item(i);
      //
      StudentBean studentBean = new StudentBean();
      //
      studentBean.setSex(student.getAttribute("sex"));
      //
      NodeList names = student.getElementsByTagName("name");

      if (names.getLength() == 1) {
        Element e = (Element) names.item(0);
        Text t = (Text) e.getFirstChild();
        studentBean.setName(t.getNodeValue());
      }

      NodeList ages = student.getElementsByTagName("age");
      if (ages.getLength() == 1) {
        Element e = (Element) ages.item(0);
        Text t = (Text) e.getFirstChild();
        studentBean.setAge(Integer.parseInt(t.getNodeValue()));
      }

      NodeList phones = student.getElementsByTagName("phone");
      if (phones.getLength() == 1) {
        Element e = (Element) phones.item(0);
        Text t = (Text) e.getFirstChild();
        studentBean.setPhone(t.getNodeValue());
      }

      student_Vector.add(studentBean);
    }
  }

  private void writeXMLFile(String outFile) throws Exception {
    //
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    DocumentBuilder db = null;
    try {
      db = dbf.newDocumentBuilder();
    }
    catch (ParserConfigurationException pce) {
      System.err.println(pce);
      System.exit(1);
    }

    Document doc = null;
    doc = db.newDocument();

    //
    Element root = doc.createElement("roster");
    //
    doc.appendChild(root);

    //
    for (int i = 0; i < student_Vector.size(); i++) {
      //
      StudentBean studentBean = (StudentBean) student_Vector.get(i);
      //
      Element student = doc.createElement("Person");
      student.setAttribute("gender", studentBean.getSex());
      root.appendChild(student);
      //
      Element name = doc.createElement("FallName");
      student.appendChild(name);
      Text tName = doc.createTextNode(studentBean.getName());
      name.appendChild(tName);

      Element age = doc.createElement("Age");
      student.appendChild(age);
      Text tAge = doc.createTextNode(String.valueOf(studentBean.getAge()));
      age.appendChild(tAge);

      Element phone = doc.createElement("Tele");
      student.appendChild(phone);
      Text tPhone = doc.createTextNode(studentBean.getPhone());
      phone.appendChild(tPhone);
    }

    //
    FileOutputStream outStream = new FileOutputStream(outFile);
    OutputStreamWriter outWriter = new OutputStreamWriter(outStream);
    ((XmlDocument) doc).write(outWriter, "ISO-8859-1");
    outWriter.close();
    outStream.close();
  }

  public static void main(String[] args) throws Exception {
    //
    XMLTest xmlTest = new XMLTest();
    //
    xmlTest.student_Vector = new Vector();

    System.out.println("reading Input.xml");
    xmlTest.readXMLFile("Input.xml");

    System.out.println("Input read, writing Output.xml");
    xmlTest.writeXMLFile("Output.xml");
    System.out.println("Finished");
  }

} // end of class XMLTest