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//
// RecursiveDirectoryIterator.h
//
// Library: Foundation
// Package: Filesystem
// Module: RecursiveDirectoryIterator
//
// Definition of the RecursiveDirectoryIterator class.
//
// Copyright (c) 2012, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#ifndef Foundation_RecursiveDirectoryIterator_INCLUDED
#define Foundation_RecursiveDirectoryIterator_INCLUDED
#include "Poco/Foundation.h"
#include "Poco/File.h"
#include "Poco/Path.h"
#include "Poco/RecursiveDirectoryIteratorImpl.h"
#include "Poco/DirectoryIteratorStrategy.h"
namespace Poco {
class DirectoryIterator;
template<class TTravStr>
class RecursiveDirectoryIteratorImpl;
template<class TTravStr = ChildrenFirstTraverse>
class RecursiveDirectoryIterator
/// The RecursiveDirectoryIterator class is used to enumerate
/// all files in a directory and its subdirectories.
///
/// RecursiveDirectoryIterator 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)
///
/// The class can follow different traversal strategies:
/// * depth-first strategy;
/// * siblings-first strategy.
/// The stategies are set by template parameter.
/// There are two corresponding typedefs:
/// * SimpleRecursiveDirectoryIterator;
/// * SiblingsFirstRecursiveDirectoryIterator.
///
/// The depth of traversal can be limited by constructor
/// parameter maxDepth (which sets the infinite depth by default).
{
public:
typedef RecursiveDirectoryIterator<TTravStr> MyType;
enum
{
D_INFINITE = 0 /// Constant for infinite traverse depth.
};
RecursiveDirectoryIterator()
/// Creates the end iterator.
: _pImpl(0)
{
}
RecursiveDirectoryIterator(const std::string& path, UInt16 maxDepth = D_INFINITE)
/// Creates a recursive directory iterator for the given path.
: _pImpl(new ImplType(path, maxDepth)), _path(Path(_pImpl->get())), _file(_path)
{
}
RecursiveDirectoryIterator(const MyType& iterator):
/// Creates a copy of another recursive directory iterator.
_pImpl(iterator._pImpl), _path(iterator._path), _file(iterator._file)
{
}
RecursiveDirectoryIterator(const DirectoryIterator& iterator, UInt16 maxDepth = D_INFINITE):
/// Creates a recursive directory iterator for the path of
/// non-recursive directory iterator.
_pImpl(new ImplType(iterator->path(), maxDepth)), _path(Path(_pImpl->get())), _file(_path)
{
}
RecursiveDirectoryIterator(const File& file, UInt16 maxDepth = D_INFINITE):
/// Creates a recursive directory iterator for the given path.
_pImpl(new ImplType(file.path(), maxDepth)), _path(Path(_pImpl->get())), _file(_path)
{
}
RecursiveDirectoryIterator(const Path& path, UInt16 maxDepth = D_INFINITE):
/// Creates a recursive directory iterator for the given path.
_pImpl(new ImplType(path.toString(), maxDepth)), _path(Path(_pImpl->get())), _file(_path)
{
}
~RecursiveDirectoryIterator()
/// Destroys the DirectoryIterator.
{
if (_pImpl)
_pImpl->release();
}
const std::string& name() const
/// Returns the current filename.
{
return _path.getFileName();
}
const Poco::Path& path() const
/// Returns the current path.
{
return _path;
}
UInt16 depth() const
/// Depth of recursion (counting from 1).
{
return _pImpl->depth();
}
UInt16 maxDepth() const
/// Max depth of recursion (counting from 1).
{
return _pImpl->maxDepth();
}
MyType& operator = (const MyType& it)
{
if (_pImpl)
_pImpl->release();
_pImpl = it._pImpl;
if (_pImpl)
{
_pImpl->duplicate();
_path = it._path;
_file = _path;
}
return *this;
}
MyType& operator = (const File& file)
{
if (_pImpl)
_pImpl->release();
_pImpl = new ImplType(file.path());
_path = Path(_pImpl->get());
_file = _path;
return *this;
}
MyType& operator = (const Path& path)
{
if (_pImpl)
_pImpl->release();
_pImpl = new ImplType(path.toString());
_path = Path(_pImpl->get());
_file = _path;
return *this;
}
MyType& operator = (const std::string& path)
{
if (_pImpl)
_pImpl->release();
_pImpl = new ImplType(path);
_path = Path(_pImpl->get());
_file = _path;
return *this;
}
MyType& operator ++ ()
{
if (_pImpl)
{
_path = Path(_pImpl->next());
_file = _path;
}
return *this;
}
const File& operator * () const
{
return _file;
}
File& operator *()
{
return _file;
}
const File* operator -> () const
{
return &_file;
}
File* operator -> ()
{
return &_file;
}
template<class T1, class T2>
friend inline bool operator ==(const RecursiveDirectoryIterator<T1>& a, const RecursiveDirectoryIterator<T2>& b);
template<class T1, class T2>
friend inline bool operator !=(const RecursiveDirectoryIterator<T1>& a, const RecursiveDirectoryIterator<T2>& b);
private:
typedef RecursiveDirectoryIteratorImpl<TTravStr> ImplType;
ImplType* _pImpl;
Path _path;
File _file;
};
//
// friend comparsion operators
//
template<class T1, class T2>
inline bool operator ==(const RecursiveDirectoryIterator<T1>& a, const RecursiveDirectoryIterator<T2>& b)
{
return a.path().toString() == b.path().toString();;
}
template<class T1, class T2>
inline bool operator !=(const RecursiveDirectoryIterator<T1>& a, const RecursiveDirectoryIterator<T2>& b)
{
return a.path().toString() != b.path().toString();;
}
//
// typedefs
//
typedef RecursiveDirectoryIterator<ChildrenFirstTraverse> SimpleRecursiveDirectoryIterator;
typedef RecursiveDirectoryIterator<SiblingsFirstTraverse> SiblingsFirstRecursiveDirectoryIterator;
} // namespace Poco
#endif // Foundation_RecursiveDirectoryIterator_INCLUDED
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