Bug 151381 [Smoke]The parameter didn't display in the web viewer
Description: Preview a parameter in the web viewer, it can't be previewed. Step to reproduce: 1. new a report and a parameter 2. drag it to the layout 3. preview it in the web viewer Actual result: the parameter is not displayed
core/org.eclipse.birt.core/src/org/eclipse/birt/core/data/DataTypeUtil.java
throw new BirtException( pluginId,
					ResourceConstants.CONVERT_FAILS,
					new Object[]{
							source.toString( ), "Date"
					},
					resourceBundle );
		}
		
		return resultDate;
	}
	/**
	 * Call org.eclipse.birt.core.format.DateFormatter
	 * @param source
	 * @return
	 */
	private static String toString( Date source, ULocale locale )
	{
		DateFormatter df = null;
		
		synchronized ( DataTypeUtil.class )
		{
			df = (DateFormatter) ( dfMap.get( locale ) );
			if ( df == null )
			{
				df = new DateFormatter( locale );
				dfMap.put( locale, df );
			}
		}
		return df.format( (Date) source );
	}