library/cpp/yson/json/json_writer.h


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89

#pragma once 
 
#include <library/cpp/yson/public.h>
#include <library/cpp/yson/consumer.h>
 
#include <library/cpp/json/json_writer.h>
 
#include <util/generic/vector.h> 
 
namespace NYT { 
    ////////////////////////////////////////////////////////////////////////////////
 
    enum EJsonFormat {
        JF_TEXT,
        JF_PRETTY
    };
 
    enum EJsonAttributesMode {
        JAM_NEVER,
        JAM_ON_DEMAND,
        JAM_ALWAYS
    };
 
    enum ESerializedBoolFormat {
        SBF_BOOLEAN,
        SBF_STRING
    };
 
    class TJsonWriter
       : public ::NYson::TYsonConsumerBase {
    public:
        TJsonWriter(
            IOutputStream* output,
            ::NYson::EYsonType type = ::NYson::EYsonType::Node,
            EJsonFormat format = JF_TEXT,
            EJsonAttributesMode attributesMode = JAM_ON_DEMAND,
            ESerializedBoolFormat booleanFormat = SBF_STRING);

        TJsonWriter(
            IOutputStream* output,
            NJson::TJsonWriterConfig config,
            ::NYson::EYsonType type = ::NYson::EYsonType::Node,
            EJsonAttributesMode attributesMode = JAM_ON_DEMAND,
            ESerializedBoolFormat booleanFormat = SBF_STRING);

        void Flush();
 
        void OnStringScalar(TStringBuf value) override;
        void OnInt64Scalar(i64 value) override;
        void OnUint64Scalar(ui64 value) override;
        void OnDoubleScalar(double value) override;
        void OnBooleanScalar(bool value) override;
 
        void OnEntity() override;
 
        void OnBeginList() override;
        void OnListItem() override;
        void OnEndList() override;
 
        void OnBeginMap() override;
        void OnKeyedItem(TStringBuf key) override;
        void OnEndMap() override;
 
        void OnBeginAttributes() override;
        void OnEndAttributes() override;
 
    private:
        THolder<NJson::TJsonWriter> UnderlyingJsonWriter;
        NJson::TJsonWriter* JsonWriter;
        IOutputStream* Output;
        ::NYson::EYsonType Type;
        EJsonAttributesMode AttributesMode;
        ESerializedBoolFormat BooleanFormat;
 
        void WriteStringScalar(const TStringBuf& value);
 
        void EnterNode();
        void LeaveNode();
        bool IsWriteAllowed();
 
        TVector<bool> HasUnfoldedStructureStack;
        int InAttributesBalance;
        bool HasAttributes;
        int Depth;
    };
 
    ////////////////////////////////////////////////////////////////////////////////
 
}