protected Boolean convertStringToParameterValue(String aValue)
	{
		if ( aValue != null )
		{
			String str = (String) aValue;
			if ( str.equalsIgnoreCase( "true" ) || str.equals( "1" ) || str.equals( BOOLEAN_TRUE ) )
			{
				return new Boolean( true );
			}
			else if ( str.equalsIgnoreCase( "false" ) || str.equals( "0" ) || str.equals( BOOLEAN_FALSE ) )
			{
				return new Boolean( false );
			}
			else if ( str.equals( "" ) )
			{
				return null;
			}
			else
			{
				return new Boolean( false );
			}
		}
		else
		{
			return null;
		}
	}