An MFC Wrapper for MSXML

Listing 1: xmlif.h — Interface to CXmlIF

/***
*  MODULE:  XmlIF.h
*  PURPOSE: Interface...XML Interface Class
*  AUTHOR:  Ben Campione
***/
#ifndef _CXMLIF_
#define _CXMLIF_

// #define _MS_XML2_           // Define import spec for MS XML DLL

#ifdef _MS_XML2_            // Import One Of The MS XML DLLs
#import "msxml3.dll" named_guids raw_interfaces_only
#define MS_XML_NS     MSXML2   // Define Name Space For MSXML2
#define XML_LOAD      load
#define XML_CRP       createProcessingInstruction
#define XML_APPCHILD  appendChild
#define XML_SELNODES  selectNodes
#define XML_CRTNODE   createNode
#define XML_CRTATTR   createAttribute
#define XML_GETNI     getNamedItem
#define XML_SETNI     setNamedItem
#else
#import "msxml.dll" named_guids raw_interfaces_only
#define MS_XML_NS     MSXML    // Define Name Space For MSXML
#define XML_LOAD      raw_load
#define XML_CRP       raw_createProcessingInstruction
#define XML_APPCHILD  raw_appendChild
#define XML_SELNODES  raw_selectNodes
#define XML_CRTNODE   raw_createNode
#define XML_CRTATTR   raw_createAttribute
#define XML_GETNI     raw_getNamedItem
#define XML_SETNI     raw_setNamedItem
#endif

const int XIF_MAX_STRING = 255;

class CXmlIF    // CXmlIF Class Interface
{
private:
  bool      m_bInitialized;
  bool      m_bLoaded;
  char      m_szURL[_MAX_PATH+1];
  char      m_szErrReason[XIF_MAX_STRING+1];
  long      m_lErrLine;
  long      m_lErrPos;

  HRESULT                       m_hr;
  MS_XML_NS::IXMLDOMDocument*   m_pDoc;
  MS_XML_NS::IXMLDOMNode*       m_pDocNode;

public:
  CXmlIF()  { Initialize();   }
  ~CXmlIF() { UnInitialize(); }

private:
  HRESULT CheckLoad(MS_XML_NS::IXMLDOMDocument* pDoc);
  void    GetParseError(MS_XML_NS::IXMLDOMParseError *pXMLError);
  void    ClearParseError(void);
  void    AppendAttribute(MS_XML_NS::IXMLDOMNode* pNode, 
                          MS_XML_NS::IXMLDOMAttribute* pAttr);

public:
  bool  Initialize(void);
  void  UnInitialize(void);
  bool  LoadDocument(const char* szURL);
  bool  SaveDocument(const char* szURL);

  bool  SetDocumentNode(void);
  bool  InsertProcessingInst(void);

  BSTR  AsciiToBSTR(const char* pszString);
  char* BSTRToAscii(const BSTR pwszString);

  bool  GetName(MS_XML_NS::IXMLDOMNode* pNode, BSTR pBName, UINT uSize);
  bool  SetText(MS_XML_NS::IXMLDOMNode* pNode, BSTR pBText);
  bool  GetText(MS_XML_NS::IXMLDOMNode* pNode, BSTR pBText, UINT uSize);
  bool  SetValue(MS_XML_NS::IXMLDOMNode* pNode, BSTR pBValue);
  bool  GetValue(MS_XML_NS::IXMLDOMNode* pNode, BSTR pBValue, UINT uSize);

  MS_XML_NS::IXMLDOMNodeList* GetChildren(MS_XML_NS::IXMLDOMNode* pNode, 
                                          const BSTR pBName = NULL, 
                                          long* pCnt = NULL);
  MS_XML_NS::IXMLDOMNode* GetChild(MS_XML_NS::IXMLDOMNode* pNode, 
                                   const BSTR pBNodeName, 
                                   UINT uOccurance);
  MS_XML_NS::IXMLDOMNode* GetChild(MS_XML_NS::IXMLDOMNodeList* pList,
                                   const long lItem);
  MS_XML_NS::IXMLDOMNode* CreateChild(MS_XML_NS::IXMLDOMNode* pNode, 
                                      const BSTR pBName,
                                      int nType = MS_XML_NS::NODE_ELEMENT);

  MS_XML_NS::IXMLDOMNamedNodeMap* CXmlIF::GetAttributeList(
                                      MS_XML_NS::IXMLDOMNode* pNode, 
                                      long* pCnt);
  MS_XML_NS::IXMLDOMNode* GetAttribute(MS_XML_NS::IXMLDOMNode* pNode, 
                                       const BSTR pBName);
  MS_XML_NS::IXMLDOMNode* GetAttribute(MS_XML_NS::IXMLDOMNamedNodeMap* pAttrs,
                                       long lIndex);
  MS_XML_NS::IXMLDOMAttribute* CreateAttribute(MS_XML_NS::IXMLDOMNode* pNode, 
                                               const BSTR pBName,
                                               const BSTR pBValue);
  bool  SetAttributeValue(MS_XML_NS::IXMLDOMNode* pNode, 
                          const BSTR pBName, BSTR pBValue);
  bool  GetAttributeValue(MS_XML_NS::IXMLDOMNode* pNode, 
                          const BSTR pBName, BSTR pBValue, UINT uSize);

  inline MS_XML_NS::IXMLDOMDocument* GetDocument(void) { return m_pDoc; }
  inline MS_XML_NS::IXMLDOMNode* GetDocumentNode(void) { return m_pDocNode; }

  inline bool IsInitialized(void) { return m_bInitialized; }
  inline bool IsLoaded(void) { return m_bLoaded; }
  
  inline const char*  GetURL(void) { return m_szURL; }
  inline const char*  GetErrReason(void) { return m_szErrReason; }
  inline long         GetErrLine(void) { return m_lErrLine; }
  inline long         GetErrPos(void) { return m_lErrPos; }
};

#endif

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