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DirectoryIterator.h

//
// DirectoryIterator.h
//
// $Id: //poco/1.2/Foundation/include/Poco/DirectoryIterator.h#3 $
//
// Library: Foundation
// Package: Filesystem
// Module:  DirectoryIterator
//
// Definition of the DirectoryIterator class.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#ifndef Foundation_DirectoryIterator_INCLUDED
#define Foundation_DirectoryIterator_INCLUDED


#include "Poco/Foundation.h"
#include "Poco/File.h"
#include "Poco/Path.h"


namespace Poco {


class DirectoryIteratorImpl;


00054 class Foundation_API DirectoryIterator
      /// The DirectoryIterator class is used to enumerate
      /// all files in a directory.
      ///
      /// DirectoryIterator has some limitations:
      ///   * only forward iteration (++) is supported
      ///   * an iterator copied from another one will always
      ///     point to the same file as the original iterator,
      ///     even is the original iterator has been advanced
      ///     (all copies of an iterator share their state with
      ///     the original iterator)
      ///   * because of this you should only use the prefix 
      ///     increment operator
{
public:
      DirectoryIterator();
            /// Creates the end iterator.
            
      DirectoryIterator(const std::string& path);
            /// Creates a directory iterator for the given path.

      DirectoryIterator(const DirectoryIterator& iterator);
            /// Creates a directory iterator for the given path.
            
      DirectoryIterator(const File& file);
            /// Creates a directory iterator for the given file.

      DirectoryIterator(const Path& path);
            /// Creates a directory iterator for the given path.

      ~DirectoryIterator();
            /// Destroys the DirectoryIterator.

      const std::string& name() const;
            /// Returns the current filename.
            
      const Path& path() const;
            /// Returns the current path.

      DirectoryIterator& operator = (const DirectoryIterator& it);
      DirectoryIterator& operator = (const File& file);
      DirectoryIterator& operator = (const Path& path);
      DirectoryIterator& operator = (const std::string& path);
      
      DirectoryIterator& operator ++ ();   // prefix
      
      //@ deprecated
      DirectoryIterator operator ++ (int); // postfix
            /// Please use the prefix increment operator instead.
      
      const File& operator * () const;
      File& operator * ();
      const File* operator -> () const;
      File* operator -> ();
      
      bool operator == (const DirectoryIterator& iterator) const;
      bool operator != (const DirectoryIterator& iterator) const;

private:
      Path _path;
      File _file;
      DirectoryIteratorImpl* _pImpl;
};


//
// inlines
//
00122 inline const std::string& DirectoryIterator::name() const
{
      return _path.getFileName();
}

      
00128 inline const Path& DirectoryIterator::path() const
{
      return _path;
}


00134 inline const File& DirectoryIterator::operator * () const
{
      return _file;
}


inline File& DirectoryIterator::operator * ()
{
      return _file;
}


inline const File* DirectoryIterator::operator -> () const
{
      return &_file;
}


inline File* DirectoryIterator::operator -> ()
{
      return &_file;
}


inline bool DirectoryIterator::operator == (const DirectoryIterator& iterator) const
{
      return name() == iterator.name();
}


inline bool DirectoryIterator::operator != (const DirectoryIterator& iterator) const
{
      return name() != iterator.name();
}


} // namespace Poco


#endif // Foundation_DirectoryIterator_INCLUDED

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