DeferredCommentImpl(DeferredDocumentImpl ownerDocument,
    int nodeIndex) 
{
    //
    // Constructors
    //
        super(ownerDocument, null);
        fNodeIndex = nodeIndex;
        needsSyncData(true);
}

This is the deferred constructor. Only the fNodeIndex is given here. All other data, can be requested from the ownerDocument via the index.

 public int getNodeIndex() 
{
        return fNodeIndex;
}

Returns the node index.

 protected  void synchronizeData() 
{
        // no need to sync in the future
        needsSyncData(false);
        // fluff data
        DeferredDocumentImpl ownerDocument =
            (DeferredDocumentImpl) this.ownerDocument();
        data = ownerDocument.getNodeValueString(fNodeIndex);
}

Synchronizes the data (name and value) for fast nodes.