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
String str = "";
			if ( source instanceof byte[] )
			{
				final int strLength = 8;
				byte[] sourceValue = (byte[]) source;
				int length = Math.min( sourceValue.length, strLength );
				for ( int i = 0; i < length; i++ )
				{
					str += Integer.toHexString( sourceValue[i] ).toUpperCase( )
							+ " ";
				}
				if ( sourceValue.length > strLength )
				{
					str += "...";
				}
			}
			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