161 lines
5.6 KiB
C++
161 lines
5.6 KiB
C++
#ifndef OSMIUM_IO_DETAIL_INPUT_FORMAT_HPP
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#define OSMIUM_IO_DETAIL_INPUT_FORMAT_HPP
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/*
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This file is part of Osmium (http://osmcode.org/libosmium).
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Copyright 2013,2014 Jochen Topf <jochen@topf.org> and others (see README).
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Boost Software License - Version 1.0 - August 17th, 2003
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Permission is hereby granted, free of charge, to any person or organization
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obtaining a copy of the software and accompanying documentation covered by
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this license (the "Software") to use, reproduce, display, distribute,
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execute, and transmit the Software, and to prepare derivative works of the
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Software, and to permit third-parties to whom the Software is furnished to
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do so, all subject to the following:
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The copyright notices in the Software and this entire statement, including
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the above license grant, this restriction and the following disclaimer,
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must be included in all copies of the Software, in whole or in part, and
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all derivative works of the Software, unless such copies or derivative
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works are solely in the form of machine-executable object code generated by
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a source language processor.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*/
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#include <functional>
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#include <map>
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#include <memory>
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#include <stdexcept>
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#include <string>
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#include <utility>
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#include <osmium/io/file.hpp>
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#include <osmium/io/file_format.hpp>
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#include <osmium/io/header.hpp>
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#include <osmium/memory/buffer.hpp>
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#include <osmium/osm/entity_bits.hpp>
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namespace osmium {
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namespace thread {
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template <typename T> class Queue;
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} // namespace thread
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namespace io {
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namespace detail {
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/**
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* Virtual base class for all classes reading OSM files in different
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* formats.
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*
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* Do not use this class or derived classes directly. Use the
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* osmium::io::Reader class instead.
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*/
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class InputFormat {
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protected:
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osmium::io::File m_file;
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osmium::osm_entity_bits::type m_read_which_entities;
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osmium::thread::Queue<std::string>& m_input_queue;
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osmium::io::Header m_header;
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explicit InputFormat(const osmium::io::File& file, osmium::osm_entity_bits::type read_which_entities, osmium::thread::Queue<std::string>& input_queue) :
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m_file(file),
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m_read_which_entities(read_which_entities),
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m_input_queue(input_queue) {
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m_header.has_multiple_object_versions(m_file.has_multiple_object_versions());
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}
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InputFormat(const InputFormat&) = delete;
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InputFormat(InputFormat&&) = delete;
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InputFormat& operator=(const InputFormat&) = delete;
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InputFormat& operator=(InputFormat&&) = delete;
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public:
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virtual ~InputFormat() {
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}
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virtual osmium::memory::Buffer read() = 0;
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virtual void close() {
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}
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virtual osmium::io::Header header() {
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return m_header;
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}
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}; // class InputFormat
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/**
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* This factory class is used to create objects that read OSM data
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* written in a specified format.
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*
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* Do not use this class directly. Instead use the osmium::io::Reader
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* class.
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*/
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class InputFormatFactory {
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public:
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typedef std::function<osmium::io::detail::InputFormat*(const osmium::io::File&, osmium::osm_entity_bits::type read_which_entities, osmium::thread::Queue<std::string>&)> create_input_type;
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private:
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typedef std::map<osmium::io::file_format, create_input_type> map_type;
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map_type m_callbacks;
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InputFormatFactory() :
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m_callbacks() {
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}
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public:
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static InputFormatFactory& instance() {
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static InputFormatFactory factory;
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return factory;
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}
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bool register_input_format(osmium::io::file_format format, create_input_type create_function) {
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if (! m_callbacks.insert(map_type::value_type(format, create_function)).second) {
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return false;
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}
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return true;
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}
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std::unique_ptr<osmium::io::detail::InputFormat> create_input(const osmium::io::File& file, osmium::osm_entity_bits::type read_which_entities, osmium::thread::Queue<std::string>& input_queue) {
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file.check();
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auto it = m_callbacks.find(file.format());
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if (it != m_callbacks.end()) {
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return std::unique_ptr<osmium::io::detail::InputFormat>((it->second)(file, read_which_entities, input_queue));
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}
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throw std::runtime_error(std::string("Support for input format '") + as_string(file.format()) + "' not compiled into this binary.");
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}
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}; // class InputFormatFactory
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} // namespace detail
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} // namespace io
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} // namespace osmium
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#endif // OSMIUM_IO_DETAIL_INPUT_FORMAT_HPP
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