SourceHttpMessageConverter.java 文件源码

@Override
@SuppressWarnings("unchecked")
protected T readInternal(Class<? extends T> clazz, HttpInputMessage inputMessage)
        throws IOException, HttpMessageNotReadableException {

    InputStream body = inputMessage.getBody();
    if (DOMSource.class.equals(clazz)) {
        return (T) readDOMSource(body);
    }
    else if (SAXSource.class.equals(clazz)) {
        return (T) readSAXSource(body);
    }
    else if (StAXSource.class.equals(clazz)) {
        return (T) readStAXSource(body);
    }
    else if (StreamSource.class.equals(clazz) || Source.class.equals(clazz)) {
        return (T) readStreamSource(body);
    }
    else {
        throw new HttpMessageConversionException("Could not read class [" + clazz +
                "]. Only DOMSource, SAXSource, StAXSource, and StreamSource are supported.");
    }
}