documentparser.java

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/**
 *   Copyright 2004 Carlos Silva A.
 * 
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License. 
 *   You may obtain a copy of the License at  
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 * 
 */
package com.csa.lib.xml.dom;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.xml.sax.AttributeList;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;

import uk.co.wilson.xml.MinML;

/**
 * DocumentParser
 * 
 * dp.parse( new InputStreamReader(new BufferedInputStream(System.in, 1024));
 * 
 * No soporta datos mezclados (elementos + texto) y solo procesa UTF-8
 * <p>
 * $Date: 2004/12/05 04:06:07 $
 * </p>
 * 
 * @version $Revision: 1.1 $
 * @author Carlos Silva
 */
public class DocumentParser extends MinML {
	Node mainElement;

	Node currentElement;

	public void parse(File f) throws SAXException, IOException {
		FileInputStream fis = new FileInputStream(f);
		parse(fis);
		fis.close();
	}

	public void parse(InputStream fis) throws SAXException, IOException {
		InputStreamReader isr = new InputStreamReader(fis, "GB2312");
		BufferedReader br = new BufferedReader(isr);
		// String thisLine = "";
		// try {
		// while ((thisLine = br.readLine()) != null) { // while loop begins
		// here
		// System.out.println(thisLine);
		// } // end while
		// } // end try
		// catch (IOException e) {
		// System.err.println("Error: " + e);
		// }

		parse(br);
		br.close();
		isr.close();
	}

	public Node getMainElement() {
		return mainElement;
	}

	public void startDocument() {
		currentElement = mainElement = new Node("DOCUMENT");

	}

	public void startElement(String name, AttributeList attributes) {
		Node e = new Node(name, attributes);
		currentElement.appendChild(e);
		currentElement = e;
	}

	public void endElement(String name) {
		currentElement = currentElement.parent;
	}

	public void characters(char ch[], int start, int length) {
		currentElement.addValue(new String(ch, start, length));
	}

	public void fatalError(SAXParseException e) throws SAXException {
		throw e;
	}

	/**
	 * Test lee y escribe un xml
	 * 
	 * @param args
	 * @throws Exception
	 */
	public static void main(String args[]) throws Exception {
		DocumentParser dp = new DocumentParser();
		dp.parse(new File("c:\\project.xml"));

		Node main = dp.getMainElement();

		DocumentWriter dw = new DocumentWriter(main);
		dw.write(new File("c:\\project2.xml"));
	}
}