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Contents
/* -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* Copyright 2020-Present Couchbase, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "json_stream_control.hxx"
#include <couchbase/error_codes.hxx>
#include <cstdint>
#include <functional>
#include <memory>
#include <string>
namespace couchbase::core::utils::json
{
namespace detail
{
struct streaming_lexer_impl;
} // namespace detail
/**
* The streaming JSON lexer consumes chunks of data, and invokes given handler for each "row", and "complete".
*
* It is guaranteed that on_complete callback will be invoked exactly once.
*/
class streaming_lexer
{
public:
/**
* @param pointer_expression expression that describes where the "row" objects are located.
* @param depth stop emitting JSON events starting from this depth. Level 1 is root of the object.
*
* @throws std::invalid_argument if pointer cannot be created from the expression.
*/
streaming_lexer(const std::string& pointer_expression, std::uint32_t depth);
void feed(std::string_view data);
void on_complete(std::function<void(std::error_code ec, std::size_t number_of_rows, std::string&& meta)> handler);
void on_row(std::function<stream_control(std::string&& row)> handler);
private:
std::shared_ptr<detail::streaming_lexer_impl> impl_{};
};
} // namespace couchbase::core::utils::json
Version data entries
8 entries across 8 versions & 1 rubygems