LCD_Document.hh

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// ----------------------------------------------------------------------------
// $Id: LCD_Document.hh,v 1.11 2004/02/03 12:45:21 uid561 Exp $
// ----------------------------------------------------------------------------
//
// -*-c++-*-
// LCD_Document.h
// As this is currently structured, there is no need for a separate
// implementation file.

#ifndef LCD_DOCUMENT_H
#define LCD_DOCUMENT_H

#include <xercesc/dom/deprecated/DOM_Document.hpp>
#include <xercesc/dom/deprecated/DOM_Element.hpp>

class LCD_DocListener;

// Virtual base class
class  LCD_Document {
public:
  // generated default constructor is good enough
  virtual ~LCD_Document() {};

  XERCES_CPP_NAMESPACE::DOM_Document getDocument() const {
    return myDoc;
  }
  XERCES_CPP_NAMESPACE::DOMString getDocTypeName() const {
    return docTypeName;
  }

  // All the remaining methods must be supplied by subclass
  virtual void registerListener(LCD_DocListener* ls) = 0;
  virtual int  deleteListener(LCD_DocListener* ls) = 0;
  virtual void notifyListeners() = 0;

  virtual XERCES_CPP_NAMESPACE::DOM_Element
  getElement(XERCES_CPP_NAMESPACE::DOMString id,
             XERCES_CPP_NAMESPACE::DOMString elementName
               = XERCES_CPP_NAMESPACE::DOMString("*")
             ) const = 0;

  bool eltPresent(XERCES_CPP_NAMESPACE::DOMString id,
                  XERCES_CPP_NAMESPACE::DOMString elementName
                   = XERCES_CPP_NAMESPACE::DOMString("*")
                  ) const
  {
    return (getElement(id,elementName) != XERCES_CPP_NAMESPACE::DOM_Element());
  }

  // Do we also want something like the following?
  //  virtual DOM_Element getElement(DOMString id, DOMString elementName,
  //                             int maxDepth) = 0;

protected:
  // handle to DOM for document comes from file
  XERCES_CPP_NAMESPACE::DOM_Document myDoc;
  XERCES_CPP_NAMESPACE::DOMString docTypeName;
  // descrip attribute of document element, if there is one
  XERCES_CPP_NAMESPACE::DOMString descrip;
};

#endif

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