package net.nyist.xmlparse.parse.sax;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import net.nyist.xmlparse.domain.Student;

import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

/**
 * @author yuchao
 * 
 * @school 南阳理工软件学院移动设备应用与开发移动四班
 * 
 * @email yu0312chao@163.com
 * 
 * @time 2014年10月1日 下午6:38:52
 * 
 */

public class PersonHandle extends DefaultHandler {

	private Student student;
	private List<Student> students;
	/**对于这个属性的使用主要作用是为了用来存放标签的名称，由此而获得这个标签下的文本内容的值*/
	private String tagName;

	public List<Student> getStudents() {
		return students;
	}

	public InputSource resolveEntity(String publicId, String systemId)
			throws IOException, SAXException {
		return null;
	}

	public void setDocumentLocator(Locator locator) {
		System.out.println("加载器开始处理xml文档........");
	}

	public void startDocument() throws SAXException {
		System.out.println("文档开始加载.........");
		students = new ArrayList<Student>();
	}

	public void endDocument() throws SAXException {
		System.out.println("xml文档处理结束.........");
	}

	public void startElement(String uri, String localName, String qName,
			Attributes attributes) throws SAXException {

		tagName = qName;
		if ("student".equals(qName)) {
			student = new Student();
			int id = Integer.parseInt(attributes.getValue("id"));
			student.setId(id);
		}
	}
	public void endElement(String uri, String localName, String qName)
			throws SAXException {
        
		if ("student".equals(qName)) {
			students.add(student);
		}
		/**将其值变为null的主要目的是为了防止再次遍历的时候保存了结尾标签，这样会有空值的存在*/
		tagName = null;
	}

	public void characters(char ch[], int start, int length)
			throws SAXException {

		if (!"".equals(tagName) && tagName != null) {

			if ("name".equals(tagName)) {

				student.setName(new String(ch, start, length));

			} else if ("sex".equals(tagName)) {

				student.setSex(new String(ch, start, length));

			} else if ("desc".equals(tagName)) {

				student.setDesc(new String(ch, start, length));
			}
		}
	}
	public static void main(String[] args) {
		PersonHandle personHandle =new PersonHandle();
		System.out.println(personHandle.getStudents());
	}
}