documentwriter.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.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.Enumeration;

import uk.co.wilson.xml.MinML;
/**
 * DocumentWriter
 * 
 * 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 04:54:34 $</p> 
 * @version $Revision: 1.2 $
 * @author Carlos Silva
 */
public class DocumentWriter extends MinML {
	PrintWriter out;
	Node e;
	public DocumentWriter(Node e) {
		this.e = e;
	}
	public void write(File out) throws IOException {
		FileOutputStream fos = new FileOutputStream(out);
		write(fos);
		fos.close();
	}
	public void write(OutputStream os) throws IOException {
		OutputStreamWriter osw = new OutputStreamWriter(os, "GB2312");
		PrintWriter pw = new PrintWriter(osw);
		write(pw);
		pw.flush();
		osw.flush();
	}
	public void write(PrintWriter pw) {
		out = pw;
		out.println("<?xml version=\"1.0\" encoding=\"GB2312\"?>");
		write(e);
	}
	void write(Node e) {
		out.print("<");
		out.print(e.name);
		
		if (e.attributes != null)
			for (Enumeration i = e.attributes.keys(); i.hasMoreElements();) {
			//	out.println("Begin ---------------");
				String key = (String) i.nextElement();
				String value = (String) e.attributes.get(key);
				out.print(" ");
				out.print(key);
				out.print("=\"");
				out.print(xmlize(value));
				out.print("\"");
		//		out.println("End ---------------");
			}
		if ((e.childs == null) && (e.getValue() == null))
			out.println("/>");
		else {
			out.print(">");
			if (e.childs != null) {				
				out.println();
				for (int i = 0; i < e.childs.size(); i++) {
					Node c = (Node) e.childs.get(i);
					write(c);
				}
			} else
				out.print(xmlize(e.getValue()));
			out.print("</");
			out.print(e.name);
			out.println(">");
		}
	}
	static String xs = "&<>";
	static String xss[] = {"&amp;","&lt;","&gt;"};
	
	static String xmlize(String s){
		StringBuffer sb = new StringBuffer();
		for (int i=0; i<s.length();i++) {
			char c = s.charAt(i);
			int	p = xs.indexOf(c);
			if (p>=0) {
				sb.append(xss[p]);				
			}else
				sb.append(c);
		}
		return sb.toString();
	} 
}