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Ajax4jsf is an open source extension to the JavaServer Faces standard that adds AJAX capability to JSF applications without requiring the writing of any JavaScript.

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package org.ajax4jsf.framework.ajax.xmlfilter.tidy;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletResponse;

import org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter;
import org.ajax4jsf.framework.ajax.xmlfilter.FilterServletResponseWrapper;
import org.ajax4jsf.framework.ajax.xmlfilter.HtmlParser;
import org.ajax4jsf.framework.ajax.xmlfilter.TidyServletResponseWrapper;
import org.ajax4jsf.framework.util.message.Messages;
import org.ajax4jsf.io.parser.FastHtmlParser;
import org.apache.commons.collections.ArrayStack;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class TidyXMLFilter extends BaseXMLFilter {
	static final Log log = LogFactory.getLog(TidyXMLFilter.class);
	private Properties _tidyProperties;
	private static final int STACK_SIZE = 100;

	/**
	 * Stack for handle parsers pool - to avoid instantiane on each request.
	 */
	private ArrayStack _parsersPool = new ArrayStack(STACK_SIZE);	

	public TidyXMLFilter() {}

	/**
     * Peturn parser to pool
	 * @param parser
	 */
	protected void reuseParser(HtmlParser parser) {
//		synchronized (_parsersPool) {
//			if (_parsersPool.size()