Bug 162281 Better parsing of BIRT_VIEWER_LOG_LEVEL parameter
java.util.logging.Level supplies a parse(String) method which parses log levels. Using this method is superior to the parsing used in ReportEngineServlet for the following reasons: - the level "ALL" is not recognized - one gets a proper exception if the level ins not recognized - a lot less code. I'll attach a patch for this.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/ReportEngineService.java
* 
	 * @param document
	 * @return the result sets from the document
	 * @throws RemoteException
	 */
	public ResultSet[] getResultSets( IReportDocument document )
			throws RemoteException
	{
		assert document != null;
		ResultSet[] resultSetArray = null;
		IDataExtractionTask dataTask = engine
				.createDataExtractionTask( document );
		try
		{
			List resultSets = dataTask.getResultSetList( );
			resultSetArray = new ResultSet[resultSets.size( )];
			if ( resultSets.size( ) > 0 )
			{
				for ( int k = 0; k < resultSets.size( ); k++ )
				{
					resultSetArray[k] = new ResultSet( );
					IResultSetItem resultSetItem = (IResultSetItem) resultSets
							.get( k );
					assert resultSetItem != null;
					resultSetArray[k].setQueryName( resultSetItem
							.getResultSetName( ) );
					IResultMetaData metaData = resultSetItem
							.getResultMetaData( );
					assert metaData != null;
					Column[] columnArray = new Column[metaData.getColumnCount( )];