XercesParser.java 文件源码

/**
 * Create a <code>SAXParser</code> based on the underlying
 * <code>Xerces</code> version.
 * @param properties parser specific properties/features
 * @return an XML Schema/DTD enabled <code>SAXParser</code>
 */
public static SAXParser newSAXParser(Properties properties) 
        throws ParserConfigurationException, 
               SAXException,
               SAXNotSupportedException {

    SAXParserFactory factory =  
                    (SAXParserFactory)properties.get("SAXParserFactory");

    if (versionNumber == null){
        versionNumber = getXercesVersion();
        version = Float.parseFloat(versionNumber);
    }

    // Note: 2.2 is completely broken (with XML Schema). 
    if (version > 2.1) {

        configureXerces(factory);
        return factory.newSAXParser();
    } else {
        SAXParser parser = factory.newSAXParser();
        configureOldXerces(parser,properties);
        return parser;
    }
}