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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems
*
* 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; version 2 of the License.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* cached_directory.h
*
* @brief
* Defines the interface to the CachedDirectory class.
*/
#ifndef DRIZZLED_CACHED_DIRECTORY_H
#define DRIZZLED_CACHED_DIRECTORY_H
#include <dirent.h>
#include <iostream>
#include <vector>
#include <set>
#include <string>
#include <cstdlib>
#include <cerrno>
namespace drizzled
{
/**
* A utility class to handle processing the entries/files within a directory.
*
* This class will allow the user to either get a list of the entry names
* within a given directory.
*/
class CachedDirectory
{
public:
enum FILTER {
NONE,
DIRECTORY,
FILE,
MAX
};
class Entry
{
Entry();
public:
std::string filename;
explicit Entry(std::string in_name)
: filename(in_name)
{}
};
typedef std::vector<Entry *> Entries;
/**
* Empty Constructor.
*/
CachedDirectory();
/**
* Constructor taking full directory path as sole parameter.
*
* @param[in] Path to the directory to open
* @param[in] File extensions to allow
*/
CachedDirectory(const std::string& in_path);
/**
* Constructor taking full directory path as sole parameter.
*
* @param[in] Path to the directory to open
* @param[in] File extensions to allow
*/
CachedDirectory(const std::string& in_path, std::set<std::string>& allowed_exts);
CachedDirectory(const std::string& in_path, enum CachedDirectory::FILTER filter);
/**
* Destructor. Cleans up any resources we've taken
*/
~CachedDirectory();
/**
* Returns whether the CachedDirectory object is in a failed state
*/
inline bool fail() const
{
return error != 0;
}
/**
* Returns the stored error code of the last action the directory
* object took (open, read, etc)
*/
inline int getError() const
{
return error;
}
/**
* Returns the current path for the cached directory
*/
inline const char *getPath() const
{
return path.c_str();
}
/**
* Return the list of entries read from the directory
*
* @returns
* A vector of strings containing the directory entry names.
*/
inline const Entries &getEntries()
{
return entries;
}
private:
std::string path; ///< Path to the directory
int error; ///< Error code stored from various syscalls
Entries entries; ///< Entries in the directory
/**
* Encapsulate the logic to open the directory.
* @param[in] The path to the directory to open and read
*
* @retval true Success
* @retval false Failure
*/
bool open(const std::string &in_path);
/**
* Encapsulate the logic to open the directory with a set of allowed
* file extensions to filter for.
*
* @param[in] The path to the directory to open and read
* @param[in] File extensions to allow
*
* @retval true Success
* @retval false Failure
*/
bool open(const std::string &in_path, std::set<std::string> &allowable_exts);
bool open(const std::string &in_path, std::set<std::string> &allowed_exts, enum CachedDirectory::FILTER filter);
friend std::ostream& operator<<(std::ostream& output, CachedDirectory &directory)
{
output << "CachedDirectory:(Path: " << directory.getPath() << ")\n";
CachedDirectory::Entries files= directory.getEntries();
for (CachedDirectory::Entries::iterator fileIter= files.begin();
fileIter != files.end(); fileIter++)
{
CachedDirectory::Entry *entry= *fileIter;
output << "\t(" << entry->filename << ")\n";
}
return output; // for multiple << operators.
}
};
} /* namespace drizzled */
#endif /* DRIZZLED_CACHED_DIRECTORY_H */
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