compoundkey.h

#ifndef compoundkey_h
#define compoundkey_h

/*+
________________________________________________________________________

 (C) dGB Beheer B.V.; (LICENSE) http://opendtect.org/OpendTect_license.txt
 Author:        A.H. Bril
 Date:          15-1-2000
 RCS:           $Id: compoundkey.h,v 1.12 2009-07-22 16:01:13 cvsbert Exp $
________________________________________________________________________

-*/


#ifndef general_h
#include <general.h>
#endif
#include <stdlib.h>
#include <iostream>

mClass CompoundKey
{
public:

    inline              CompoundKey( const char* s=0 )  { if ( s ) id_ = s; }
    inline              CompoundKey( const CompoundKey& ck ) 
                        : id_(ck.id_)                   {}
    inline CompoundKey& operator=(const char* s)        {id_ = s; return *this;}
    inline CompoundKey& operator+=(const char*);
    inline bool         operator==(const char* s) const { return id_ == s; }
    inline bool         operator==(const CompoundKey& u) const
                                                        { return id_ == u.id_; }
    inline bool         operator!=(const char* s) const { return id_ != s; }
    inline bool         operator!=(const CompoundKey& u) const
                                                        { return id_ != u.id_; }
    inline void         setEmpty()                      { id_.setEmpty(); }
    inline bool         isEmpty() const                 { return id_.isEmpty();}
    inline char*        buf()                           { return id_.buf(); }
    inline const char*  buf() const                     { return id_.buf(); }
    inline              operator const char*() const    { return buf(); }

    int                 nrKeys() const;
    BufferString        key(int) const;
    void                setKey(int,const char*);
    CompoundKey         upLevel() const;
    bool                isUpLevelOf(const CompoundKey&) const;

    virtual bool        matchGE(const char*) const;

protected:

    BufferString        id_;
    char*               fromKey(int,bool cptobuf=false) const;
    friend std::istream& operator >>(std::istream&,CompoundKey&);

};


inline CompoundKey& CompoundKey::operator +=( const char* s )
{
    if ( !id_.isEmpty() ) id_ += ".";
    id_ += s;
    return *this;
}


#endif