import com.sun.xml.internal.ws.streaming.XMLStreamReaderException; //导入依赖的package包/类
/**
 * Returns the FI parser allocated for this thread.
 */
public static XMLStreamReader createFIStreamReader(InputStream in) {
    // Check if compatible implementation of FI was found
    if (FastInfosetReflection.fiStAXDocumentParser_new == null) {
        throw new XMLReaderException("fastinfoset.noImplementation");
    }

    try {
        // Do not use StAX pluggable layer for FI
        Object sdp = FastInfosetReflection.fiStAXDocumentParser_new.newInstance();
        FastInfosetReflection.fiStAXDocumentParser_setStringInterning.invoke(sdp, Boolean.TRUE);
        FastInfosetReflection.fiStAXDocumentParser_setInputStream.invoke(sdp, in);
        return (XMLStreamReader) sdp;
    } catch (Exception e) {
        throw new XMLStreamReaderException(e);
    }
}
 

import com.sun.xml.internal.ws.streaming.XMLStreamReaderException; //导入依赖的package包/类
/**
 * Creates a {@link Message} from {@link XMLStreamBuffer} that retains the
 * whole envelope infoset.
 *
 * @param xsb
 *      This buffer must contain the infoset of the whole envelope.
 */
public static @NotNull Message create(@NotNull XMLStreamBuffer xsb) {
    // TODO: we should be able to let Messae know that it's working off from a buffer,
    // to make some of the operations more efficient.
    // meanwhile, adding this as an API so that our users can take advantage of it
    // when we get around to such an implementation later.
    try {
        return create(xsb.readAsXMLStreamReader());
    } catch (XMLStreamException e) {
        throw new XMLStreamReaderException(e);
    }
}