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
}
			else
			{
				str = source.toString( );
			}
			return str;
		}
	}
	/**
	 * Converting Blob to/from other types is not currently supported
	 * @param source
	 * @return
	 * @throws BirtException
	 */
	public static Blob toBlob( Object source ) throws BirtException
	{
		
		if ( source == null )
			return null;
		if ( source instanceof Blob )
			return (Blob) source;
		else
			throw new BirtException( pluginId,
					ResourceConstants.CONVERT_FAILS,
					new Object[]{
							source.toString( ), "Blob"
					},
					resourceBundle );
	}
	/**