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//
// StringTokenizer.h
//
// Library: Foundation
// Package: Core
// Module: StringTokenizer
//
// Definition of the StringTokenizer class.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#ifndef Foundation_StringTokenizer_INCLUDED
#define Foundation_StringTokenizer_INCLUDED
#include "Poco/Foundation.h"
#include "Poco/Exception.h"
#include <vector>
#include <cstddef>
namespace Poco {
class Foundation_API StringTokenizer
/// A simple tokenizer that splits a string into
/// tokens, which are separated by separator characters.
/// An iterator is used to iterate over all tokens.
{
public:
enum Options
{
TOK_IGNORE_EMPTY = 1, /// ignore empty tokens
TOK_TRIM = 2 /// remove leading and trailing whitespace from tokens
};
typedef std::vector<std::string> TokenVec;
typedef TokenVec::const_iterator Iterator;
StringTokenizer(const std::string& str, const std::string& separators, int options = 0);
/// Splits the given string into tokens. The tokens are expected to be
/// separated by one of the separator characters given in separators.
/// Additionally, options can be specified:
/// * TOK_IGNORE_EMPTY: empty tokens are ignored
/// * TOK_TRIM: trailing and leading whitespace is removed from tokens.
~StringTokenizer();
/// Destroys the tokenizer.
Iterator begin() const;
Iterator end() const;
const std::string& operator [] (std::size_t index) const;
/// Returns const reference the index'th token.
/// Throws a RangeException if the index is out of range.
std::string& operator [] (std::size_t index);
/// Returns reference to the index'th token.
/// Throws a RangeException if the index is out of range.
bool has(const std::string& token) const;
/// Returns true if token exists, false otherwise.
std::string::size_type find(const std::string& token, std::string::size_type pos = 0) const;
/// Returns the index of the first occurence of the token
/// starting at position pos.
/// Throws a NotFoundException if the token is not found.
std::size_t replace(const std::string& oldToken, const std::string& newToken, std::string::size_type pos = 0);
/// Starting at position pos, replaces all subsequent tokens having value
/// equal to oldToken with newToken.
/// Returns the number of modified tokens.
std::size_t count() const;
/// Returns the total number of tokens.
std::size_t count(const std::string& token) const;
/// Returns the number of tokens equal to the specified token.
private:
StringTokenizer(const StringTokenizer&);
StringTokenizer& operator = (const StringTokenizer&);
void trim(std::string& token);
TokenVec _tokens;
};
//
// inlines
//
inline StringTokenizer::Iterator StringTokenizer::begin() const
{
return _tokens.begin();
}
inline StringTokenizer::Iterator StringTokenizer::end() const
{
return _tokens.end();
}
inline std::string& StringTokenizer::operator [] (std::size_t index)
{
if (index >= _tokens.size()) throw RangeException();
return _tokens[index];
}
inline const std::string& StringTokenizer::operator [] (std::size_t index) const
{
if (index >= _tokens.size()) throw RangeException();
return _tokens[index];
}
inline std::size_t StringTokenizer::count() const
{
return _tokens.size();
}
} // namespace Poco
#endif // Foundation_StringTokenizer_INCLUDED
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