Bug 155478 [regression]Numbers in cascading group displays incorrectly
Description: Numbers in cascading group displays incorrectly. Steps to reproduce: 1. New sample data source and dataset from table ORDERS. 2. New a cascading group with two sub parameters, the first is from STATUS and the second is from ORDERNUMBER. 3. Preview 4. Select a status value in poped up parameter dialog, see ordernumber list Expected result: See 10100, 10101, such kind of format. Actual result: I saw 10.100, 10.167..., I just listed out the numbers as example
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/util/ParameterValidationUtil.java
.equalsIgnoreCase( dataType ) )
				return doValidateDateTimeByPattern( format, value, locale );
			else if ( DesignChoiceConstants.PARAM_TYPE_FLOAT
					.equalsIgnoreCase( dataType ) )
			{
				Number number = doValidateNumberByPattern( dataType, format,
						value, locale );
				if ( number == null )
					return null;
				return new Double( number.doubleValue( ) );
			}
			else if ( DesignChoiceConstants.PARAM_TYPE_DECIMAL
					.equalsIgnoreCase( dataType ) )
			{
				Number number = doValidateNumberByPattern( dataType, format,
						value, locale );
				if ( number == null )
					return null;
				return new BigDecimal( number.toString( ) );
			}
			else if ( DesignChoiceConstants.PARAM_TYPE_INTEGER
					.equalsIgnoreCase( dataType ) )
			{
				Number number = doValidateNumberByPattern( dataType, format,
						value, locale );
				if ( number == null )
					return null;
				return new Integer( number.intValue( ) );
			}
			else if ( DesignChoiceConstants.PARAM_TYPE_BOOLEAN