metadata.h

Last change: 2008-02-03 This is the source code of KCeasy。

/*
This file is part of KCeasy (http://www.kceasy.com)
Copyright (C) 2002-2004 Markus Kern <[e-mail]>

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
*/
//---------------------------------------------------------------------------
#ifndef MetaDataH
#define MetaDataH

#include <map>

#include "istring.h"
//---------------------------------------------------------------------------

namespace KCeasyEngine {

using std::map;

// mime type handling

typedef enum
{
    FTUnknown = 0xF0,
    FTAudio = 0xF1,
    FTVideo = 0xF2,
    FTImage = 0xF3,
    FTDocument = 0xF4,
    FTSoftware = 0xF5,
    FTTorrent = 0xF6
} TFileType;

TFileType FileTypeFromMime(const string& MimeType);

// meta data handling

class TMetaDataPair
{
public:
    TMetaDataPair(string& NName, string& NValue) : Name(NName), Value(NValue) {}
    TMetaDataPair(const TMetaDataPair& Org) : Name(Org.Name), Value(Org.Value) {}
    TMetaDataPair& operator =(const TMetaDataPair& Org) { Name = Org.Name; Value = Org.Value; return *this; }

    string Name;
    string Value;
};

class TMetaData
{
public:
    class Iterator : public map<string,TMetaDataPair>::const_iterator
    {
    public:
        Iterator(map<string,TMetaDataPair>::const_iterator itr) : map<string,TMetaDataPair>::const_iterator(itr) {}
        const TMetaDataPair& operator *() { return (map<string,TMetaDataPair>::const_iterator::operator*()).second; }
    };

    TMetaData();
    TMetaData(const TMetaData& Org);
    TMetaData& operator =(const TMetaData& Org);

    const string& Get(const char* Name) const;
    int GetInt(const char* Name) const;
    void Set(string& Name, string& Value);
    void SetInt(string& Name, int Value);

    bool Exists(const char* Name) const { return (pair_map.find(Name) != pair_map.end()); }
    void Remove(const char* Name) { pair_map.erase(Name); }

    bool Empty() const { return pair_map.empty(); }
    int NoOfPairs() const { return pair_map.size(); }
    Iterator Begin() { return (map<string,TMetaDataPair>::const_iterator)pair_map.begin(); }
    Iterator End() { return (map<string,TMetaDataPair>::const_iterator)pair_map.end(); }

private:
    map<string,TMetaDataPair> pair_map;
};

} // namespace KCeasyEngine

#endif