pilota 0.13.1

Pilota is a thrift and protobuf implementation in pure rust with high performance and extensibility.
Documentation 
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
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251

use std::option::Option;

use protobuf::descriptor;

pub trait ItemDescriptorGetter {
    fn get_message_descriptor_proto(&self, name: &str) -> Option<&descriptor::DescriptorProto>;
    fn get_enum_descriptor_proto(&self, name: &str) -> Option<&descriptor::EnumDescriptorProto>;
    fn get_service_descriptor_proto(
        &self,
        name: &str,
    ) -> Option<&descriptor::ServiceDescriptorProto>;
}

impl ItemDescriptorGetter for descriptor::FileDescriptorProto {
    fn get_message_descriptor_proto(&self, name: &str) -> Option<&descriptor::DescriptorProto> {
        if name.is_empty() {
            return None;
        }

        self.message_type.iter().find(|s| s.name() == name)
    }

    fn get_enum_descriptor_proto(&self, name: &str) -> Option<&descriptor::EnumDescriptorProto> {
        if name.is_empty() {
            return None;
        }

        self.enum_type.iter().find(|s| s.name() == name)
    }

    fn get_service_descriptor_proto(
        &self,
        name: &str,
    ) -> Option<&descriptor::ServiceDescriptorProto> {
        if name.is_empty() {
            return None;
        }

        self.service.iter().find(|s| s.name() == name)
    }
}

pub trait FieldDescriptorGetter {
    fn get_field_descriptor_proto(&self, name: &str) -> Option<&descriptor::FieldDescriptorProto>;
    fn get_oneof_descriptor_proto(&self, name: &str) -> Option<&descriptor::OneofDescriptorProto>;
    fn get_enum_descriptor_proto(&self, name: &str) -> Option<&descriptor::EnumDescriptorProto>;
    fn get_message_descriptor_proto(&self, name: &str) -> Option<&descriptor::DescriptorProto>;
}

impl FieldDescriptorGetter for descriptor::DescriptorProto {
    fn get_field_descriptor_proto(&self, name: &str) -> Option<&descriptor::FieldDescriptorProto> {
        if name.is_empty() {
            return None;
        }

        self.field.iter().find(|s| s.name() == name)
    }

    fn get_oneof_descriptor_proto(&self, name: &str) -> Option<&descriptor::OneofDescriptorProto> {
        if name.is_empty() {
            return None;
        }

        self.oneof_decl.iter().find(|s| s.name() == name)
    }

    fn get_enum_descriptor_proto(&self, name: &str) -> Option<&descriptor::EnumDescriptorProto> {
        if name.is_empty() {
            return None;
        }

        self.enum_type.iter().find(|s| s.name() == name)
    }

    fn get_message_descriptor_proto(&self, name: &str) -> Option<&descriptor::DescriptorProto> {
        if name.is_empty() {
            return None;
        }

        self.nested_type.iter().find(|s| s.name() == name)
    }
}

#[cfg(test)]
mod tests {
    use protobuf::descriptor;

    use super::*;

    fn make_file_with_items() -> descriptor::FileDescriptorProto {
        let mut f = descriptor::FileDescriptorProto::new();

        // message Foo
        let mut m = descriptor::DescriptorProto::new();
        m.name = Some("Foo".to_string());
        f.message_type.push(m);

        // enum Bar
        let mut e = descriptor::EnumDescriptorProto::new();
        e.name = Some("Bar".to_string());
        f.enum_type.push(e);

        // service Baz
        let mut s = descriptor::ServiceDescriptorProto::new();
        s.name = Some("Baz".to_string());
        f.service.push(s);

        f
    }

    #[test]
    fn test_get_message_descriptor_proto_found_and_missing() {
        let f = make_file_with_items();
        // found
        let got = f.get_message_descriptor_proto("Foo");
        assert!(got.is_some());
        assert_eq!(got.unwrap().name.as_deref(), Some("Foo"));
        // missing
        assert!(f.get_message_descriptor_proto("NotExist").is_none());
        // empty name -> None
        assert!(f.get_message_descriptor_proto("").is_none());
    }

    #[test]
    fn test_get_enum_descriptor_proto_found_and_missing() {
        let f = make_file_with_items();
        // found
        let got = f.get_enum_descriptor_proto("Bar");
        assert!(got.is_some());
        assert_eq!(got.unwrap().name.as_deref(), Some("Bar"));
        // missing
        assert!(f.get_enum_descriptor_proto("NotExist").is_none());
        // empty name -> None
        assert!(f.get_enum_descriptor_proto("").is_none());
    }

    #[test]
    fn test_get_service_descriptor_proto_found_and_missing() {
        let f = make_file_with_items();
        // found
        let got = f.get_service_descriptor_proto("Baz");
        assert!(got.is_some());
        assert_eq!(got.unwrap().name.as_deref(), Some("Baz"));
        // missing
        assert!(f.get_service_descriptor_proto("NotExist").is_none());
        // empty name -> None
        assert!(f.get_service_descriptor_proto("").is_none());
    }

    #[test]
    fn test_get_oneof_descriptor_proto_found_and_missing() {
        let mut msg = descriptor::DescriptorProto::new();
        msg.name = Some("Container".to_string());

        // oneof alpha
        let mut o1 = descriptor::OneofDescriptorProto::new();
        o1.name = Some("alpha".to_string());
        msg.oneof_decl.push(o1);
        // oneof beta
        let mut o2 = descriptor::OneofDescriptorProto::new();
        o2.name = Some("beta".to_string());
        msg.oneof_decl.push(o2);

        // found
        let got = msg.get_oneof_descriptor_proto("alpha");
        assert!(got.is_some());
        assert_eq!(got.unwrap().name.as_deref(), Some("alpha"));

        // other found
        let got = msg.get_oneof_descriptor_proto("beta");
        assert!(got.is_some());
        assert_eq!(got.unwrap().name.as_deref(), Some("beta"));

        // missing
        assert!(msg.get_oneof_descriptor_proto("gamma").is_none());
        // empty name -> None
        assert!(msg.get_oneof_descriptor_proto("").is_none());
    }

    #[test]
    fn test_get_field_descriptor_proto_found_and_missing() {
        let mut msg = descriptor::DescriptorProto::new();
        msg.name = Some("Container".to_string());

        // field id
        let mut f1 = descriptor::FieldDescriptorProto::new();
        f1.name = Some("id".to_string());
        msg.field.push(f1);
        // field name
        let mut f2 = descriptor::FieldDescriptorProto::new();
        f2.name = Some("name".to_string());
        msg.field.push(f2);

        // found
        let got = msg.get_field_descriptor_proto("id");
        assert!(got.is_some());
        assert_eq!(got.unwrap().name.as_deref(), Some("id"));

        // other found
        let got = msg.get_field_descriptor_proto("name");
        assert!(got.is_some());
        assert_eq!(got.unwrap().name.as_deref(), Some("name"));

        // missing
        assert!(msg.get_field_descriptor_proto("age").is_none());
        // empty name -> None
        assert!(msg.get_field_descriptor_proto("").is_none());
    }

    #[test]
    fn test_get_enum_descriptor_proto_in_descriptor_proto_found_and_missing() {
        let mut msg = descriptor::DescriptorProto::new();
        msg.name = Some("Container".to_string());

        // enum Color
        let mut e = descriptor::EnumDescriptorProto::new();
        e.name = Some("Color".to_string());
        msg.enum_type.push(e);

        // found
        let got = msg.get_enum_descriptor_proto("Color");
        assert!(got.is_some());
        assert_eq!(got.unwrap().name.as_deref(), Some("Color"));

        // missing
        assert!(msg.get_enum_descriptor_proto("Size").is_none());
        // empty name -> None
        assert!(msg.get_enum_descriptor_proto("").is_none());
    }

    #[test]
    fn test_get_message_descriptor_proto_in_descriptor_proto_found_and_missing() {
        let mut msg = descriptor::DescriptorProto::new();
        msg.name = Some("Container".to_string());

        // nested message Item
        let mut m = descriptor::DescriptorProto::new();
        m.name = Some("Item".to_string());
        msg.nested_type.push(m);

        // found
        let got = msg.get_message_descriptor_proto("Item");
        assert!(got.is_some());
        assert_eq!(got.unwrap().name.as_deref(), Some("Item"));

        // missing
        assert!(msg.get_message_descriptor_proto("Detail").is_none());
        // empty name -> None
        assert!(msg.get_message_descriptor_proto("").is_none());
    }
}