RSSParser.java 文件源码

/**
 * Parses input stream as an RSS 2.0 feed.
 *
 * @return in-memory representation of an RSS feed
 * @throws IllegalArgumentException if either argument is {@code null}
 */
private RSSFeed parse(SAXParser parser, InputStream feed)
        throws SAXException, IOException {
    if (parser == null) {
        throw new IllegalArgumentException("RSS parser must not be null.");
    } else if (feed == null) {
        throw new IllegalArgumentException("RSS feed must not be null.");
    }

    // SAX automatically detects the correct character encoding from the stream
    // See also http://www.w3.org/TR/REC-xml/#sec-guessing
    final InputSource source = new InputSource(feed);
    final XMLReader xmlreader = parser.getXMLReader();
    final RSSHandler handler = new RSSHandler(config);

    xmlreader.setContentHandler(handler);
    xmlreader.parse(source);

    return handler.feed();
}