/*

* Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  

*

*/

package com.nokia.helium.sbs.plexus;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import org.apache.log4j.Logger;

import com.nokia.helium.core.plexus.FileStreamConsumer;

/**

 * Record a stream into a file. 

 *

 */

public class SBSErrorStreamConsumer extends FileStreamConsumer {

    private Logger log = Logger.getLogger(SBSErrorStreamConsumer.class);

    private String errorPattern ;

    /**

     * Create a FileStreamConsumer which will record content to 

     * the output file.

     * @param output the file to write the output to.

     * @param string 

     * @throws FileNotFoundException if an error occur while opening the file.

     */

    public SBSErrorStreamConsumer(File output, String string) throws FileNotFoundException {

        super(output);

        this.errorPattern = string;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public synchronized void consumeLine(String line) {

        if (this.errorPattern == null) {

            try {

                BufferedWriter writer = getWriter();

                writer.write("Error:" + line);

                writer.newLine();

            } catch (IOException e) {

                log.error("Error while writing to file: " + e.getMessage(), e);

            }

        } else {

            try {

                Pattern pattern = Pattern.compile(this.errorPattern, Pattern.CASE_INSENSITIVE);

                Matcher match = pattern.matcher(line);

                if (match.find()) {

                    BufferedWriter writer = getWriter();

                    writer.write("Error:" + line);

                    writer.newLine();

                }

            } catch (IOException e) {

                log.error("Error while writing to file: " + e.getMessage(), e);

            }

        }

    }

}