Bug 153896 Improve the performance of BIRT datetime-converting
The current datetime converting algorithm in birt.core, xml&flatfile ODA implementations are not efficient enough.This is because we use java's SimpleDateTimeFormatter to parse ISO8601 compatible date/time values. We should write our own datatime string parser for ISO8601 datetime format.
core/org.eclipse.birt.core/src/org/eclipse/birt/core/data/DataTypeUtil.java
},
					resourceBundle );
		}
		
		return resultDate;
	}
	/**
	 * Call org.eclipse.birt.core.format.DateFormatter
	 * @param source
	 * @return
	 */
	private static String toString( Date source, ULocale locale )
	{
		DateFormatter df = null;
		
		df = (DateFormatter) ( dfMap.get( locale ) );
		if ( df == null )
		{
			synchronized ( dfMap )
			{
				df = (DateFormatter) ( dfMap.get( locale ) );
				if ( df == null )
				{
					df = new DateFormatter( locale );
					dfMap.put( locale, df );
				}
			}
		}
		return df.format( (Date) source );
	}