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
* @param value
	 *            the input value to validate
	 * @param locale
	 *            the locale information
	 * @return the validated value if the input value is valid for the given
	 *         data type and format choice string
	 * @throws ValidationValueException
	 *             if the input value is not valid with the given data type and
	 *             format string
	 */
	static public Object validate( String dataType, String format,
			String value, Locale locale ) throws ValidationValueException
	{
		return validate( dataType, format, value, ULocale.forLocale( locale ) );
	}
	/**
	 * Validates a input parameter value with the given data type, format choice
	 * string. The returned value is locale and pattern dependent. The data type
	 * and the format can be one pair of the following:
	 * <p>
	 * <table border="1" cellpadding="0" cellspacing="0" style="border-collapse:
	 * collapse" bordercolor="#111111" width="36%" id="AutoNumber1">
	 * <tr>
	 * <td width="16%">Data Type</td>
	 * <td width="84%">Format Type</td>
	 * </tr>
	 * <tr>
	 * <td width="16%">Float/Decimal</td>
	 * <td width="84%">
	 * <ul>