Bug 180123 Add input format hint for date and time type as datetime type does.[0705]
Description: Add input format hint for date and time type as datetime type does. build number:2.2.0.v20070330 Steps to reproduce: 1. New a report parameter. 2. Set Type as Date or Time. Expected result: Show value input format below default value as datetime type does. Actual result: No hint about how to input date/time value.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
string = new StringFormatter( pattern ).format( string );
			}
		}
		catch ( BirtException e )
		{
			
		}
		return string;
	}
	/**
	 * Check if the specified value is valid
	 * 
	 * @param value
	 *            the value to check
	 * @return Returns the error message if the input value is invalid,or null
	 *         if it is valid
	 */
	private String isValidValue( String value )
	{
		if ( canBeNull( ) )
		{
			if ( value == null || value.length( ) == 0 )
			{
				return null;
			}
		}
		else
		{
			if ( value == null || value.length( ) == 0 )
			{