EDIT

// $Id$

/**

* Copyright (C) 2009 EDIT

* European Distributed Institute of Taxonomy 

* http://www.e-taxonomy.eu

* 

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.common;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.StringBufferInputStream;

import org.apache.log4j.Logger;

/**

 * @author a.kohlbecker

 * @date 16.12.2010

 *

 */

public class StreamUtils {

	public static final Logger logger = Logger.getLogger(StreamUtils.class);

	/**

	 * Replaces each substring of this stream that matches the literal search sequence with the specified literal replace sequence. 

	 * The replacement proceeds from the beginning of the stream to the end, for example, replacing "aa" with "b" in the string "aaa" will result in "ba" rather than "ab".

	 * 

	 * @param stream 

	 * @param search The sequence of char values to be replaced

	 * @param replace The replacement sequence of char values

	 * @return

	 * @throws IOException

	 * 

	 */

	public static InputStream streamReplace(InputStream stream, String search,	String replace) throws IOException {

		InputStreamReader reader = new InputStreamReader(stream);

		StringBuilder strBuilder = new StringBuilder();

		char[] cbuf = new char[1024];

		int charsRead = -1;

		while ((charsRead = reader.read(cbuf)) > -1){

			strBuilder.append(cbuf, 0, charsRead);

		}

		String replacedContent = strBuilder.toString().replace(search, replace);	

		StringBufferInputStream replacedStream = new StringBufferInputStream(replacedContent); //TODO replace with StringReader

		logger.debug(replacedContent);

		return replacedStream;

	}

	public static InputStream streamReplaceAll(InputStream stream, String regex, String replace) throws IOException {

		InputStreamReader reader = new InputStreamReader(stream);

		StringBuilder strBuilder = new StringBuilder();

		char[] cbuf = new char[1024];

		int charsRead = -1;

		while ((charsRead = reader.read(cbuf)) > -1){

			strBuilder.append(cbuf, 0, charsRead);

		}

		String replacedContent = strBuilder.toString().replaceAll(regex, replace);	

		StringBufferInputStream replacedStream = new StringBufferInputStream(replacedContent); //TODO replace with StringReader

		logger.debug(replacedContent);

		return replacedStream;

	}

	public static String readToString(InputStream stream) throws IOException {

		InputStreamReader reader = new InputStreamReader(stream);

		StringBuilder strBuilder = new StringBuilder();

		char[] cbuf = new char[1024];

		int charsRead = -1;

		while ((charsRead = reader.read(cbuf)) > -1){

			strBuilder.append(cbuf, 0, charsRead);

		}

		return strBuilder.toString();

	}

}