Helper-classes.hh

#ifndef HELPER_CLASSES_H
#define HELPER_CLASSES_H

/*
This file is part of the sample code for the article,
"Processing XML with Xerces and SAX" by Ethan McCallum (2005/11/10)

Published on ONLamp.com (http://www.onlamp.com/)
http://www.onlamp.com/pub/a/onlamp/2005/11/10/xerces_sax.html
*/

/*
Misc utility classes and routines for using Xerces-C++
*/


// = = = = = = = = = = = = = = = = = = = =

#include <algorithm>
#include <functional>
#include <iterator>

#include <xercesc/util/XMLString.hpp>

struct FreeXercesString {

    static void releaseXMLString( XMLCh* str ) {
        xercesc::XMLString::release( &str ) ;
        return ;
    }

    static void releaseCString( char* str ) {
        xercesc::XMLString::release( &str ) ;
        return ;
    }

} ; // FreeXercesString

// = = = = = = = = = = = = = = = = = = = =

#include<string>
#include<xercesc/util/XMLString.hpp>

class DualString {

    public :
    DualString( const XMLCh* const original ) ;

    DualString( const XMLCh* const original , int length ) ;

    DualString( const char* const original ) ;

    DualString( const char* const original , int length ) ;

    DualString( const std::string& original ) ;

    ~DualString() throw() ;


    const char* asCString() const throw() ;

    const XMLCh* asXMLString() const throw() ;

    std::ostream& print( std::ostream& s ) const ;


    protected:
    // empty


    private :
    char*   cString_ ;
    XMLCh*  xmlString_ ;

} ; // class DualString


std::ostream& operator<<( std::ostream& s, const DualString& obj ) ;


// = = = = = = = = = = = = = = = = = = = =

#include<list>
#include<stdexcept>

#include<xercesc/util/XMLString.hpp>

class StringManager {

    private:
    typedef std::list< XMLCh* > XMLStringList ;
    typedef std::list< char* > CStringList ;

    XMLStringList xmlStrings_ ;
    CStringList cStrings_ ;

    protected:
    // empty

    public:
    StringManager() ;

    ~StringManager() throw() ;


    void drain() throw() ;


    char* disown( char* str ) throw( std::logic_error ) ;


    XMLCh* disown( XMLCh* str ) throw( std::logic_error ) ;


    XMLCh* convert( const char* str ) ;


    XMLCh* convert( const std::string& str ) ;


    char* convert( const XMLCh* str ) ;

} ; // class StringManager 



#endif // #ifndef HELPER_CLASSES_H

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