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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/vespalib/stllike/string.h>
#include <vector>
#include <memory>
namespace vespalib {
class asciistream;
/**
* If you want a simpler interface to write JSON with, look at the JsonStream
* class in the same directory as this class, this uses this class to make a
* more user friendly writer.
*/
class JSONWriter {
private:
enum State {
INIT = 0,
OBJECT,
ARRAY
};
asciistream * _os;
std::vector<State> _stack;
bool _comma;
bool _pretty;
uint32_t _indent;
void push(State next);
void pop(State expected);
void considerComma();
void updateCommaState();
void quote(const char * str, size_t len);
void indent();
public:
JSONWriter();
JSONWriter(asciistream & output);
JSONWriter(const JSONWriter &) = delete;
JSONWriter & operator = (const JSONWriter &) = delete;
JSONWriter(JSONWriter &&) = default;
JSONWriter & operator = (JSONWriter &&) = default;
~JSONWriter();
JSONWriter & setOutputStream(asciistream & output);
JSONWriter & clear();
JSONWriter & beginObject();
JSONWriter & endObject();
JSONWriter & beginArray();
JSONWriter & endArray();
JSONWriter & appendNull();
JSONWriter & appendKey(stringref str);
JSONWriter & appendBool(bool v);
JSONWriter & appendDouble(double v);
JSONWriter & appendFloat(float v);
JSONWriter & appendInt64(int64_t v);
JSONWriter & appendUInt64(uint64_t v);
JSONWriter & appendString(stringref str);
JSONWriter & appendJSON(stringref json);
void setPretty() { _pretty = true; };
};
class JSONStringer : public JSONWriter {
private:
std::unique_ptr<asciistream> _oss;
public:
JSONStringer();
JSONStringer(JSONStringer &&) = default;
JSONStringer & operator = (JSONStringer &&) = default;
~JSONStringer();
JSONStringer & clear();
stringref toString() const;
};
}
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