Bug 214204 Only document content in document folder should be removed.[0601]
Description: Only document related content in document folder should be removed. Build number:2.3.0.v20080103 Steps to reproduce: 1. Deploy BIRT. 2. Edit web.xml to set BIRT_VIEWER_DOCUMENT_FOLDER to your local path and there are content inside the path. 3. Start server and click View Example to preview sample report. Expected result: Only content created by viewer should be removed in specified document folder. Actual result: All contents are deleted despite whether they are related with BIRT. Error log:n/a
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
* @return
	 */
	protected static String getParameter( HttpServletRequest request,
			String parameterName, boolean isUTF )
	{
		String ISOParameterName = ( isUTF )
				? toISOString( parameterName )
				: parameterName;
		String value = request.getParameter( ISOParameterName );
		String encoding = request.getCharacterEncoding( );
		return toUTFString( value, encoding );
	}
	/**
	 * Get named parameter as integer from http request. parameter names and
	 * values are all in iso-8859-1 format in request.
	 * 
	 * @param request
	 * @param parameterName
	 * @return
	 */
	protected static int getParameterAsInt( HttpServletRequest request,
			String parameterName )
	{
		int iValue = -1;
		String value = getParameter( request, parameterName );
		if ( value != null && value.length( ) > 0 )
		{
			try
			{
				iValue = Integer.parseInt( value );