-
Notifications
You must be signed in to change notification settings - Fork 112
/
encode.go
236 lines (207 loc) · 5.78 KB
/
encode.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
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
/*
* 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 hessian
import (
"reflect"
"time"
"unsafe"
)
import (
perrors "github.com/pkg/errors"
)
// nil bool int8 int32 int64 float32 float64 time.Time
// string []byte []interface{} map[interface{}]interface{}
// array object struct
// Encoder struct
type Encoder struct {
classInfoList []*ClassInfo
buffer []byte
refMap map[unsafe.Pointer]_refElem
}
// classIndex find the index of the given java name in encoder class info list.
func (e *Encoder) classIndex(javaName string) int {
for i := range e.classInfoList {
if javaName == e.classInfoList[i].javaName {
return i
}
}
return -1
}
// NewEncoder generate an encoder instance
func NewEncoder() *Encoder {
buffer := make([]byte, 64)
return &Encoder{
buffer: buffer[:0],
refMap: make(map[unsafe.Pointer]_refElem, 7),
}
}
// Clean clean the Encoder (room) for a new object encoding.
func (e *Encoder) Clean() {
buffer := make([]byte, 64)
e.classInfoList = nil
e.buffer = buffer[:0]
e.refMap = make(map[unsafe.Pointer]_refElem, 7)
}
// ReuseBufferClean reuse the Encoder for a new object encoding.
// it reuse allocated buffer and reduce memory-allocation.
func (e *Encoder) ReuseBufferClean() {
var buffer []byte
if cap(e.buffer) <= 512 {
// reuse buffer, avoid allocate
buffer = e.buffer[:0]
} else {
// avoiding memory leak caused by growth of underlying array
buffer = make([]byte, 64)
}
e.classInfoList = nil
e.buffer = buffer[:0]
e.refMap = make(map[unsafe.Pointer]_refElem, 7)
}
// Buffer returns byte buffer
func (e *Encoder) Buffer() []byte {
return e.buffer[:]
}
// Append byte arr to encoder buffer
func (e *Encoder) Append(buf []byte) {
e.buffer = append(e.buffer, buf[:]...)
}
// Encode If @v can not be encoded, the return value is nil. At present only struct may can not be encoded.
func (e *Encoder) Encode(v interface{}) error {
if v == nil {
e.buffer = EncNull(e.buffer)
return nil
}
switch val := v.(type) {
case nil:
e.buffer = EncNull(e.buffer)
return nil
case bool:
e.buffer = encBool(e.buffer, val)
case uint8:
e.buffer = encInt32(e.buffer, int32(val))
case int8:
e.buffer = encInt32(e.buffer, int32(val))
case int16:
e.buffer = encInt32(e.buffer, int32(val))
case uint16:
e.buffer = encInt32(e.buffer, int32(val))
case int32:
e.buffer = encInt32(e.buffer, int32(val))
case uint32:
e.buffer = encInt64(e.buffer, int64(val))
case int:
// if v.(int) >= -2147483648 && v.(int) <= 2147483647 {
// b = encInt32(int32(v.(int)), b)
// } else {
// b = encInt64(int64(v.(int)), b)
// }
// use int64 type to handle int, to avoid panic like : reflect: Call using int32 as type int64 [recovered]
// when decode
e.buffer = encInt64(e.buffer, int64(val))
case uint:
e.buffer = encInt64(e.buffer, int64(val))
case int64:
e.buffer = encInt64(e.buffer, val)
case uint64:
e.buffer = encInt64(e.buffer, int64(val))
case time.Time:
if ZeroDate == val {
e.buffer = EncNull(e.buffer)
} else {
e.buffer = encDateInMs(e.buffer, &val)
// e.buffer = encDateInMimute(v.(time.Time), e.buffer)
}
case float32:
e.buffer = encFloat32(e.buffer, val)
case float64:
e.buffer = encFloat(e.buffer, val)
case string:
e.buffer = encString(e.buffer, val)
case []byte:
e.buffer = encBinary(e.buffer, val)
case map[interface{}]interface{}:
return e.encUntypedMap(val)
case POJOEnum:
if p, ok := v.(POJOEnum); ok {
return e.encObject(p)
}
default:
t := UnpackPtrType(reflect.TypeOf(v))
switch t.Kind() {
case reflect.Struct:
vv := reflect.ValueOf(v)
if vv.Kind() != reflect.Ptr {
v = PackPtrInterface(v, vv)
} else {
vv = UnpackPtr(vv)
}
if !vv.IsValid() {
e.buffer = EncNull(e.buffer)
return nil
}
if vv.Type().String() == "time.Time" {
e.buffer = encDateInMs(e.buffer, v)
return nil
}
if p, ok := v.(POJO); ok {
var clazz string
clazz = p.JavaClassName()
if c, ok := GetSerializer(clazz); ok {
return c.EncObject(e, p)
}
return e.encObject(p)
}
return e.encObject(vv.Interface())
case reflect.Slice, reflect.Array:
return e.encList(v)
case reflect.Map: // the type must be map[string]int
return e.encMap(v)
case reflect.Bool:
vv := v.(*bool)
if vv != nil {
e.buffer = encBool(e.buffer, *vv)
} else {
e.buffer = EncNull(e.buffer)
}
case reflect.Int32:
if t == _typeOfRune {
e.buffer = encString(e.buffer, string(*v.(*Rune)))
return nil
}
var err error
e.buffer, err = e.encTypeInt32(e.buffer, v)
if err != nil {
return err
}
case reflect.String,
reflect.Int, reflect.Int8, reflect.Int16, reflect.Int64,
reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
reflect.Float32, reflect.Float64: // resolve base type
vVal := reflect.ValueOf(v)
if reflect.Ptr == vVal.Kind() {
if vVal.IsNil() {
e.buffer = EncNull(e.buffer)
return nil
}
return e.Encode(vVal.Elem().Interface())
}
default:
return perrors.Errorf("type not supported! %s", t.Kind().String())
}
}
return nil
}