Bug 177691 Support Date/Time type in BIRT.
We plan to support Date/Time type in BIRT. Please refer to attached document/patch file for necessary info.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/util/ParameterValidationUtil.java
Number number = doValidateNumber( dataType, value, locale );
			if ( number == null )
				return null;
			return new Double( number.doubleValue( ) );
		}
		else if ( DesignChoiceConstants.PARAM_TYPE_DECIMAL
				.equalsIgnoreCase( dataType ) )
		{
			Number number = doValidateNumber( dataType, value, locale );
			if ( number == null )
				return null;
			return new BigDecimal( number.toString( ) );
		}
		else if ( DesignChoiceConstants.PARAM_TYPE_INTEGER
				.equalsIgnoreCase( dataType ) )
		{
			Number number = doValidateNumber( dataType, value, locale );
			if ( number == null )
				return null;
			return new Integer( number.intValue( ) );
		}
		else if ( DesignChoiceConstants.PARAM_TYPE_BOOLEAN
				.equalsIgnoreCase( dataType ) )
		{
			return doValidateBoolean( value, locale );
		}
		else if ( DesignChoiceConstants.PARAM_TYPE_STRING
				.equalsIgnoreCase( dataType ) )
		{
			return value;