Bug 146709 Dates still do not work from main report to sub reports...
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/util/ParameterValidationUtil.java
* locale. The value must be the valid data type.
	 * 
	 * @param dataType
	 *            the data type of the input value
	 * @param value
	 *            the input value to validate
	 * @param locale
	 *            the locale information
	 * @return the formatted string
	 * 
	 */
	static private String getDisplayValue( String dataType, Object value,
			ULocale locale )
	{
		if ( DesignChoiceConstants.PARAM_TYPE_DATETIME
				.equalsIgnoreCase( dataType )
				|| value instanceof Date )
		{
			DateFormat formatter = DateFormat.getDateTimeInstance(
					DateFormat.MEDIUM, DateFormat.MEDIUM, locale );
			return formatter.format( (Date) value );
		}
		else if ( DesignChoiceConstants.PARAM_TYPE_FLOAT
				.equalsIgnoreCase( dataType )
				|| value instanceof Float || value instanceof Double )
		{
			NumberFormat formatter = NumberFormat.getNumberInstance( locale );
			return formatter.format( ( (Double) value ).doubleValue( ) );
		}
		else if ( DesignChoiceConstants.PARAM_TYPE_DECIMAL