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
* <ul>
	 * <li><code>PARAM_TYPE_DATETIME</code></li>
	 * <li><code>PARAM_TYPE_FLOAT</code></li>
	 * <li><code>PARAM_TYPE_DECIMAL</code></li>
	 * <li><code>PARAM_TYPE_BOOLEAN</code></li>
	 * <li><code>PARAM_TYPE_STRING</code></li>
	 * </ul>
	 * 
	 * @param dataType
	 *            the data type of the value
	 * @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
	 * @throws ValidationValueException
	 *             if the input value is not valid with the given data type
	 */
	static private Object validate( String dataType, String value,
			ULocale locale ) throws ValidationValueException
	{
		if ( value == null )
			return null;
		if ( DesignChoiceConstants.PARAM_TYPE_DATETIME
				.equalsIgnoreCase( dataType ) )
			return doVidateDateTime( value, locale );
		else if ( DesignChoiceConstants.PARAM_TYPE_FLOAT
				.equalsIgnoreCase( dataType ) )
		{