Bug 152443 Support boolean type in data set
Support boolean type in data set. It'll cause some data transform issue with absence of boolean type.
core/org.eclipse.birt.core/src/org/eclipse/birt/core/data/DataTypeUtil.java
}
		}
		else
		{
			throw new CoreException(
					ResourceConstants.CONVERT_FAILS,
					new Object[]{
							source.toString( ), "Double"
					});
		}
	}
	/**
	 * Number -> String
	 * 		Number.toString()
	 * Boolean -> String
	 * 		Boolean.toString()
	 * Date	-> String
	 * 		toString(Date)
	 * @param source
	 * @return
	 * @throws BirtException
	 */
	public static String toString( Object source ) throws BirtException
	{
		return toString( source, ULocale.getDefault( ) );
	}
	/**
	 * A temp solution to the adoption of ICU4J. It is a simple delegation
	 * to toString( Object, Locale ).
	 * @param source