documentmodel.hpp

OSB-PIK-OpenVXI-3.0.0源代码 “中国XML论坛 - 专业的XML技术讨论区--XML在语音技术中的应用”

#ifndef _DOCUMENT_MODEL__HPP_
 #define _DOCUMENT_MODEL__HPP_

 /****************License************************************************
  *
  * Copyright 2000-2003.  ScanSoft, Inc.    
  *
  * Use of this software is subject to notices and obligations set forth 
  * in the SpeechWorks Public License - Software Version 1.2 which is 
  * included with this software. 
  *
  * ScanSoft is a registered trademark of ScanSoft, Inc., and OpenSpeech, 
  * SpeechWorks and the SpeechWorks logo are registered trademarks or 
  * trademarks of SpeechWorks International, Inc. in the United States 
  * and other countries.
  *
  ***********************************************************************/
 

 #include "VXIvalue.h"
 #include "VXML.h"
 #include <string>
 
 typedef std::basic_string<VXIchar> vxistring;
 class VXMLElement;
 class VXMLNodeRef;
 class VXMLNodeIterator;
 class VXMLNodeIteratorData;
 class VXMLDocumentRep;
 
 
 class VXMLDocumentModel {
 public:
   static bool Initialize();
   static void Deinitialize();
 
   static void CreateHiddenVariable(vxistring &);
   static bool IsHiddenVariable(const vxistring &);
 
   class OutOfMemory { };
   class InternalError { };
 };
 
 
 class VXMLNode {
   friend class VXMLNodeIterator;
 
 public:
   enum VXMLNodeType {
     Type_VXMLContent,              // This node represents a leaf.
     Type_VXMLElement,              // This node represents a branch.
     Type_VXMLNode                  // This node is not initialized.
   };
 
   VXMLNode(const VXMLNodeRef * i = NULL) : internals(i) { }
   virtual ~VXMLNode()          { }
 
   VXMLNode(const VXMLNode & x);
   VXMLNode & operator=(const VXMLNode &);
 
 public:
   VXMLNodeType GetType() const;
   VXMLElement GetParent() const;
 
   bool operator!=(const VXMLNode &x) const  { return internals != x.internals;}
   bool operator==(const VXMLNode &x) const  { return internals == x.internals;}
 
   bool operator==(int a) const               { if (a != 0) return false;
                                                return (internals == NULL); }
 
   bool operator!=(int a) const               { if (a != 0) return false;
                                                return (internals != NULL); }
 
 protected:
   const VXMLNodeRef * internals;
 };
 
 
 class VXMLNodeIterator {
 public: // Creators
   VXMLNodeIterator(const VXMLNode &);
   ~VXMLNodeIterator();
 
 public: // Manipulators
   void operator++();                 // Increments iterator to next child
   VXMLNode operator*() const;        // Returns corresponding node
   operator const void *() const;     // Returns 0 if iteration is invalid
   void reset();                      // Resets iterator to first child
 
 private: // not implemented
   VXMLNodeIterator(const VXMLNodeIterator &);
   VXMLNodeIterator & operator=(const VXMLNodeIterator &);
 
   VXMLNodeIteratorData * data;
 };
 
 
 class VXMLContent : public VXMLNode {
 public:
   virtual ~VXMLContent() { }
 
 public:
   const vxistring & GetValue() const;
 
 private: // Not implemented
   VXMLContent();
   VXMLContent(const VXMLContent & x);
   VXMLContent & operator=(const VXMLNode &);
   VXMLContent(const VXMLElement * p);
 };
 
 
 class VXMLElement : public VXMLNode {
 public: // Creation & comparison functions
   VXMLElement(const VXMLNodeRef * ref = NULL);
   VXMLElement(const VXMLElement & x);
   virtual ~VXMLElement() { }
 
   // Navigation functions (moving up & down the tree)
   bool hasChildren() const;
 
   // Information retrieval
   VXMLElementType GetName() const;
   bool GetAttribute(VXMLAttributeType key, vxistring & attr) const;
 
 private:
   VXMLElement & operator=(const VXMLNode &);
 };
 
 #endif // #ifndef _DOCUMENT_MODEL__HPP_