forked from apache/beam
/
user.go
110 lines (99 loc) · 3.46 KB
/
user.go
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
// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You 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.
package graphx
import (
"reflect"
"encoding/json"
"encoding/base64"
"github.com/apache/beam/sdks/go/pkg/beam/core/funcx"
"github.com/apache/beam/sdks/go/pkg/beam/core/graph/coder"
v1pb "github.com/apache/beam/sdks/go/pkg/beam/core/runtime/graphx/v1"
"github.com/apache/beam/sdks/go/pkg/beam/core/util/protox"
"github.com/apache/beam/sdks/go/pkg/beam/core/util/reflectx"
)
// EncodeType encodes a type as a string. Unless registered, the decoded type
// is only guaranteed to be isomorphic to the input with regard to data members.
// The returned type will have no methods.
func EncodeType(t reflect.Type) (string, error) {
ref, err := encodeType(t)
if err != nil {
return "", err
}
return protox.EncodeBase64(ref)
}
// DecodeType decodes a type. Unless registered, the decoded type is only
// guaranteed to be isomorphic to the input with regard to data members.
// The returned type will have no methods.
func DecodeType(data string) (reflect.Type, error) {
var ref v1pb.Type
if err := protox.DecodeBase64(data, &ref); err != nil {
return nil, err
}
return decodeType(&ref)
}
// EncodeFn encodes a function and parameter types as a string. The function
// symbol must be resolvable via the runtime.GlobalSymbolResolver. The types must
// be encodable.
func EncodeFn(fn reflectx.Func) (string, error) {
u, err := funcx.New(fn)
if err != nil {
return "", err
}
ref, err := encodeUserFn(u)
if err != nil {
return "", err
}
return protox.EncodeBase64(ref)
}
// DecodeFn encodes a function. The function symbol must be resolvable via the
// runtime.GlobalSymbolResolver. The parameter types must be encodable.
func DecodeFn(data string) (reflectx.Func, error) {
var ref v1pb.UserFn
if err := protox.DecodeBase64(data, &ref); err != nil {
return nil, err
}
fn, err := decodeUserFn(&ref)
if err != nil {
return nil, err
}
return reflectx.MakeFunc(fn), nil
}
// EncodeCoder encodes a coder as a string. Any custom coder function
// symbol must be resolvable via the runtime.GlobalSymbolResolver. The types must
// be encodable.
func EncodeCoder(c *coder.Coder) (string, error) {
ref, err := EncodeCoderRef(c)
if err != nil {
return "", err
}
data, err := json.Marshal(ref)
if err != nil {
return "", err
}
return base64.StdEncoding.EncodeToString(data), nil
}
// DecodeCoder decodes a coder. Any custom coder function symbol must be
// resolvable via the runtime.GlobalSymbolResolver. The types must be encodable.
func DecodeCoder(data string) (*coder.Coder, error) {
decoded, err := base64.StdEncoding.DecodeString(data)
if err != nil {
return nil, err
}
var ref CoderRef
if err := json.Unmarshal(decoded, &ref); err != nil {
return nil, err
}
return DecodeCoderRef(&ref)
}