forked from kubernetes/kubernetes
-
Notifications
You must be signed in to change notification settings - Fork 0
/
isolator.go
129 lines (111 loc) · 3.6 KB
/
isolator.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
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
// Copyright 2015 The appc Authors
//
// Licensed 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 types
import (
"encoding/json"
)
var (
isolatorMap map[ACIdentifier]IsolatorValueConstructor
)
func init() {
isolatorMap = make(map[ACIdentifier]IsolatorValueConstructor)
}
type IsolatorValueConstructor func() IsolatorValue
func AddIsolatorValueConstructor(n ACIdentifier, i IsolatorValueConstructor) {
isolatorMap[n] = i
}
func AddIsolatorName(n ACIdentifier, ns map[ACIdentifier]struct{}) {
ns[n] = struct{}{}
}
// Isolators encapsulates a list of individual Isolators for the ImageManifest
// and PodManifest schemas.
type Isolators []Isolator
// GetByName returns the last isolator in the list by the given name.
func (is *Isolators) GetByName(name ACIdentifier) *Isolator {
var i Isolator
for j := len(*is) - 1; j >= 0; j-- {
i = []Isolator(*is)[j]
if i.Name == name {
return &i
}
}
return nil
}
// Unrecognized returns a set of isolators that are not recognized.
// An isolator is not recognized if it has not had an associated
// constructor registered with AddIsolatorValueConstructor.
func (is *Isolators) Unrecognized() Isolators {
u := Isolators{}
for _, i := range *is {
if i.value == nil {
u = append(u, i)
}
}
return u
}
// IsolatorValue encapsulates the actual value of an Isolator which may be
// serialized as any arbitrary JSON blob. Specific Isolator types should
// implement this interface to facilitate unmarshalling and validation.
type IsolatorValue interface {
UnmarshalJSON(b []byte) error
AssertValid() error
}
// Isolator is a model for unmarshalling isolator types from their JSON-encoded
// representation.
type Isolator struct {
// Name is the name of the Isolator type as defined in the specification.
Name ACIdentifier `json:"name"`
// ValueRaw captures the raw JSON value of an Isolator that was
// unmarshalled. This field is used for unmarshalling only. It MUST NOT
// be referenced by external users of the Isolator struct. It is
// exported only to satisfy Go's unfortunate requirement that fields
// must be capitalized to be unmarshalled successfully.
ValueRaw *json.RawMessage `json:"value"`
// value captures the "true" value of the isolator.
value IsolatorValue
}
// isolator is a shadow type used for unmarshalling.
type isolator Isolator
// Value returns the raw Value of this Isolator. Users should perform a type
// switch/assertion on this value to extract the underlying isolator type.
func (i *Isolator) Value() IsolatorValue {
return i.value
}
// UnmarshalJSON populates this Isolator from a JSON-encoded representation. To
// unmarshal the Value of the Isolator, it will use the appropriate constructor
// as registered by AddIsolatorValueConstructor.
func (i *Isolator) UnmarshalJSON(b []byte) error {
var ii isolator
err := json.Unmarshal(b, &ii)
if err != nil {
return err
}
var dst IsolatorValue
con, ok := isolatorMap[ii.Name]
if ok {
dst = con()
err = dst.UnmarshalJSON(*ii.ValueRaw)
if err != nil {
return err
}
err = dst.AssertValid()
if err != nil {
return err
}
}
i.value = dst
i.ValueRaw = ii.ValueRaw
i.Name = ii.Name
return nil
}