/*

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

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "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:

*

* Replaces special characters with escape sequences 

*

*/

package com.nokia.tracecompiler.decodeplugins.dictionary.encoder;

/**

 * Replaces special characters with escape sequences

 * 

 */

class XMLDataFilter {

	/**

	 * XML start tag

	 */

	private static final String LEFT_ARROW = "<"; //$NON-NLS-1$

	/**

	 * XML end tag

	 */

	private static final String RIGHT_ARROW = ">"; //$NON-NLS-1$

	/**

	 * XML entity tag

	 */

	private static final String AMPERSAND = "&"; //$NON-NLS-1$

	/**

	 * XML start tag escaped

	 */

	private static final String LEFT_ARROW_SUBST = "<"; //$NON-NLS-1$

	/**

	 * XML end tag escaped

	 */

	private static final String RIGHT_ARROW_SUBST = ">"; //$NON-NLS-1$

	/**

	 * XML entity tag escaped

	 */

	private static final String AMPERSAND_SUBST = "&"; //$NON-NLS-1$

	/**

	 * Not found result

	 */

	private static final int NOT_FOUND = -1;

	/**

	 * Changes XML data

	 * 

	 * @param data

	 *            data to be changed

	 * @return changed data

	 */

	static String changeData(String data) {

		// This must be before any other that will add & marks to the text.

		// Otherwise those will be replaced also.

		if (data.indexOf(AMPERSAND) != NOT_FOUND) {

			data = data.replaceAll(AMPERSAND, AMPERSAND_SUBST);

		}

		if (data.indexOf(LEFT_ARROW) != NOT_FOUND) {

			data = data.replaceAll(LEFT_ARROW, LEFT_ARROW_SUBST);

		}

		if (data.indexOf(RIGHT_ARROW) != NOT_FOUND) {

			data = data.replaceAll(RIGHT_ARROW, RIGHT_ARROW_SUBST);

		}

		return data;

	}

}