package com;

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

import com.PropertyUtil;
import com.SysException;
import com.User;

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

import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

//使用DefaultHandler的好處 是 不必陳列出所有方法,
public class SaxDataSet extends DefaultHandler {
	private StringBuffer buf;

	private PropertyUtil pc;

	private Object obj;

	private List result;

	private final String root = "xmlbody";

	private Date start = new Date();

	public SaxDataSet() {
		super();
	}

	public SaxDataSet(Object obj) {
		super();
		// TODO Auto-generated constructor stub
		this.obj = obj;
		pc = new PropertyUtil();
	}

	public void setDocumentLocator(Locator locator) {
	}

	public void startDocument() throws SAXException {
		buf = new StringBuffer();
		result = new ArrayList();
		// System.out.println("*******開始解析文檔*******");
	}

	public void endDocument() throws SAXException {
		// System.out.println("*******文檔解析結束*******");
		// System.out.println("size:"+this.result.size());
		long tmp = new Date().getTime() - start.getTime();
		System.out.println("sax耗時：" + tmp + " ms");
	}

	public void startPrefixMapping(String prefix, String uri) {
		System.out.println(" 前綴映射: " + prefix + " 開始!" + " 它的URI是:" + uri);
	}

	public void endPrefixMapping(String prefix) {
		System.out.println(" 前綴映射: " + prefix + " 結束!");
	}

	public void processingInstruction(String target, String instruction)
			throws SAXException {
	}

	public void ignorableWhitespace(char[] chars, int start, int length)
			throws SAXException {
	}

	public void skippedEntity(String name) throws SAXException {
	}

	public void startElement(String namespaceURI, String localName,
			String qName, Attributes atts) {
		buf.delete(0, buf.length());
		/*
		 * for (int i = 0; i < atts.getLength(); i++) { System.out.println("元素名" +
		 * atts.getLocalName(i) + "屬性值" + atts.getValue(i)); }
		 */
	}

	public void endElement(String namespaceURI, String localName, String qName)
			throws SAXException {
		//System.out.println(qName);
		try {
			String className = "";
			if (this.obj != null) {
				className = pc.getClassName(obj.getClass());
			}
			if (!qName.equals(this.root)) {
				if (qName.equals(className)) {
					// System.out.println();
					this.result.add(obj);
					// pc.toString(obj);
				} else {
					pc.setValue(obj, qName, buf.toString());
				}
			}
		} catch (Exception e) {
			// TODO: handle exception
			e.printStackTrace();
		}

	}

	public void characters(char[] chars, int start, int length)
			throws SAXException {
		// 將元素內容累加到StringBuffer中
		buf.append(chars, start, length);
	}

	public List copy(HttpServletRequest request) throws SysException {
		try {
			SAXParserFactory sf = SAXParserFactory.newInstance();
			SAXParser sp = sf.newSAXParser();
			// TestSAX testsax = new TestSAX(new User(),null);
			// sp.parse(new InputSource("D:\\user.xml"), this);
			ServletInputStream in = request.getInputStream();
			sp.parse(in, this);
			return this.getResult();
		} catch (IOException e) {
			throw new SysException("SYS-0016", "SYS", "網絡繁忙，請稍后再試！", this
					.getClass().getName()
					+ ":objectToObject()", null, e);
		} catch (SAXException e) {
			e.printStackTrace();
			throw new SysException("SYS-0016", "SYS", "網絡繁忙，請稍后再試！", this
					.getClass().getName()
					+ ":objectToObject()", null, e);
		} catch (Exception e) {
			throw new SysException("SYS-0016", "SYS", "網絡繁忙，請稍后再試！", this
					.getClass().getName()
					+ ":objectToObject()", null, e);
		}
	}

	public static void main(String args[]) {
		try {

			// SAXParserFactory sf = SAXParserFactory.newInstance();
			// SAXParser sp = sf.newSAXParser();
			SaxDataSet testsax = new SaxDataSet(new User());
			// sp.parse(new InputSource("D:\\user.xml"), testsax);
			testsax.copy(null);

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

	}

	public List getResult() {
		return result;
	}

	public void setResult(List result) {
		this.result = result;
	}
}