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Copy pathEncoder.h
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78 lines (67 loc) · 2.31 KB
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#pragma once
#include <unordered_map>
#include <string>
#include <sstream>
#include "boost/archive/iterators/base64_from_binary.hpp"
#include "boost/archive/iterators/binary_from_base64.hpp"
#include "boost/archive/iterators/transform_width.hpp"
#include "EncodingTypes.h"
#include "EncodingContext.h"
namespace cppkin
{
class span_impl;
class SimpleAnnotation;
class Encoder {
static const char* base64_padding[];
public:
static std::string base64EncodeText(const std::string& data) {
using namespace boost::archive::iterators;
typedef base64_from_binary<transform_width<std::string::const_iterator, 6, 8> > base64_enc;
std::stringstream ss;
std::copy(base64_enc(data.begin()), base64_enc(data.end()), std::ostream_iterator<char>(ss));
ss << base64_padding[data.size() % 3];
return ss.str();
}
virtual ~Encoder() {}
virtual std::string ToString(const span_impl&) const = 0;
virtual std::string ToString(const std::vector<EncoderContext::ContextElement>&) const = 0;
};
template<EncodingType::Enumeration>
class EncoderImpl: public Encoder
{
public:
EncoderImpl();
std::string ToString(const span_impl&) const override {
throw core::Exception(__CORE_SOURCE, "Unsupported method");
}
std::string ToString(const std::vector<EncoderContext::ContextElement>&) const override {
throw core::Exception(__CORE_SOURCE, "Unsupported method");
}
};
class EncoderCreator
{
public:
virtual ~EncoderCreator() {}
virtual std::unique_ptr<Encoder> Create() = 0;
};
template<typename ConcreteEncoder>
class ConcreteEncoderCreator : public EncoderCreator
{
public:
virtual ~ConcreteEncoderCreator() {}
std::unique_ptr<Encoder> Create() override {
return std::unique_ptr<Encoder>(new ConcreteEncoder());
}
};
class EncoderFactory
{
public:
static const EncoderFactory& Instance();
~EncoderFactory() {}
std::unique_ptr<Encoder> Create(EncodingType type) const;
private:
EncoderFactory();
private:
std::unordered_map<EncodingType, std::unique_ptr<EncoderCreator>, EncodingType::Hash> m_encoders;
};
}