void setSource(Reader reader) {
		if (reader == null) {
			throw new IllegalArgumentException("'reader' must not be null.");
		}

		br =
				(reader instanceof BufferedReader) ? (BufferedReader) reader : new BufferedReader(
						reader);
	}
void setSource ( Reader reader ) { if ( reader == null ) { throw new IllegalArgumentException ( "'reader' must not be null." ) ; } br = ( reader instanceof BufferedReader ) ? ( BufferedReader ) reader : new BufferedReader ( reader ) ; }
Sets an Reader as the {@code JSON} feed.
@param reader
A Reader. Cannot be null.