src/NullByteHandler.h
author František Kučera <franta-hg@frantovo.cz>
Sat, 30 Mar 2019 16:14:41 +0100
branchv_0
changeset 11 7c92942ac1e8
parent 4 12ffbdbb3574
child 15 638f581903d0
permissions -rw-r--r--
fix typo: Hadler → Handler
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
4
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
     1
/**
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
     2
 * Relational pipes
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
     3
 * Copyright © 2018 František Kučera (Frantovo.cz, GlobalCode.info)
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
     4
 *
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
     5
 * This program is free software: you can redistribute it and/or modify
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
     6
 * it under the terms of the GNU General Public License as published by
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
     7
 * the Free Software Foundation, either version 3 of the License, or
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
     8
 * (at your option) any later version.
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
     9
 *
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    10
 * This program is distributed in the hope that it will be useful,
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    11
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    12
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    13
 * GNU General Public License for more details.
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    14
 *
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    15
 * You should have received a copy of the GNU General Public License
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    16
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    17
 */
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    18
#pragma once
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    19
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    20
#include <memory>
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    21
#include <string>
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    22
#include <vector>
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    23
#include <iostream>
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    24
#include <sstream>
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    25
#include <locale>
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    26
#include <codecvt>
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    27
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    28
#include <relpipe/reader/typedefs.h>
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    29
#include <relpipe/reader/TypeId.h>
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    30
#include <relpipe/reader/handlers/RelationalReaderStringHandler.h>
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    31
#include <relpipe/reader/handlers/AttributeMetadata.h>
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    32
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    33
namespace relpipe {
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    34
namespace out {
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    35
namespace nullbyte {
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    36
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    37
using namespace relpipe;
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    38
using namespace relpipe::reader;
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    39
using namespace relpipe::reader::handlers;
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    40
11
7c92942ac1e8 fix typo: Hadler → Handler
František Kučera <franta-hg@frantovo.cz>
parents: 4
diff changeset
    41
class NullByteHandler : public RelationalReaderStringHandler {
4
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    42
private:
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    43
	std::ostream& output;
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    44
	std::wstring_convert<std::codecvt_utf8<wchar_t>> convertor; // TODO: support also other encodings.
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    45
public:
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    46
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    47
	NullByteHandler(std::ostream& output) : output(output) {
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    48
	}
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    49
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    50
	void startRelation(string_t name, std::vector<AttributeMetadata> attributes) override {
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    51
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    52
	}
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    53
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    54
	void attribute(const string_t& value) override {
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    55
		output << convertor.to_bytes(value).c_str();
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    56
		output.put(0);
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    57
	}
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    58
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    59
	void endOfPipe() {
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    60
		output.flush();
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    61
	}
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    62
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    63
};
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    64
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    65
}
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    66
}
12ffbdbb3574 NullByteHandler: produces \0-separated values
František Kučera <franta-hg@frantovo.cz>
parents:
diff changeset
    67
}