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list.go
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list.go
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/*
* 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 (
"io"
"reflect"
"strconv"
"strings"
"sync"
"time"
)
import (
perrors "github.com/pkg/errors"
)
import (
"github.com/apache/dubbo-go-hessian2/java_exception"
)
var (
listTypeNameMapper = &sync.Map{}
listTypeMapper = map[string]reflect.Type{
"string": reflect.TypeOf(""),
"java.lang.String": reflect.TypeOf(""),
"char": reflect.TypeOf(""),
"short": reflect.TypeOf(int32(0)),
"int": reflect.TypeOf(int32(0)),
"long": reflect.TypeOf(int64(0)),
"float": reflect.TypeOf(float64(0)),
"double": reflect.TypeOf(float64(0)),
"boolean": reflect.TypeOf(true),
"java.util.Date": reflect.TypeOf(time.Time{}),
"date": reflect.TypeOf(time.Time{}),
"object": reflect.TypeOf([]Object{}).Elem(),
"java.lang.Object": reflect.TypeOf([]Object{}).Elem(),
// exception field StackTraceElement
"java.lang.StackTraceElement": reflect.TypeOf([]*java_exception.StackTraceElement{}).Elem(),
}
)
func init() {
listTypeNameMapper.Store("string", "[string")
listTypeNameMapper.Store("int8", "[short")
listTypeNameMapper.Store("int16", "[short")
listTypeNameMapper.Store("uint16", "[short")
listTypeNameMapper.Store("int32", "[int")
listTypeNameMapper.Store("uint32", "[int")
listTypeNameMapper.Store("int", "[long")
listTypeNameMapper.Store("uint", "[long")
listTypeNameMapper.Store("int64", "[long")
listTypeNameMapper.Store("uint64", "[long")
listTypeNameMapper.Store("float32", "[float")
listTypeNameMapper.Store("float64", "[double")
listTypeNameMapper.Store("bool", "[boolean")
listTypeNameMapper.Store("time.Time", "[date")
listTypeNameMapper.Store("github.com/apache/dubbo-go-hessian2/java_exception/java_exception.Throwabler", "[java.lang.Throwable")
listTypeNameMapper.Store("github.com/apache/dubbo-go-hessian2/hessian.Object", "[object")
}
func registerListNameMapping(gotype, javaType string) {
listTypeNameMapper.Store(gotype, "["+javaType)
}
func getListTypeName(goType string) string {
buf := strings.Builder{}
count := strings.Count(goType, "[]")
if count > 0 {
for i := 1; i < count; i++ {
buf.WriteString("[")
}
goType = strings.Replace(goType, "[]", "", -1)
}
v, ok := listTypeNameMapper.Load(goType)
if !ok {
v, ok = listTypeNameMapper.Load(strings.TrimPrefix(goType, "*"))
}
if ok {
buf.WriteString(v.(string))
return buf.String()
}
return ""
}
func getListType(javaListName string) reflect.Type {
javaName := javaListName
if strings.Index(javaName, "[") == 0 {
javaName = javaName[1:]
}
if strings.Index(javaName, "[") == 0 {
lt := getListType(javaName)
if lt == nil {
return nil
}
return reflect.SliceOf(lt)
}
var sliceTy reflect.Type
ltm := listTypeMapper[javaName]
if ltm != nil {
sliceTy = reflect.SliceOf(ltm)
}
if sliceTy == nil {
tpStructInfo, _ := getStructInfo(javaName)
if tpStructInfo == nil || tpStructInfo.typ == nil {
return nil
}
tp := tpStructInfo.typ
if tp.Kind() != reflect.Ptr {
tp = reflect.New(tp).Type()
}
sliceTy = reflect.SliceOf(tp)
}
return sliceTy
}
// Object is equal to Object of java When encoding
type Object interface{}
/////////////////////////////////////////
// List
/////////////////////////////////////////
// encList write list
func (e *Encoder) encList(v interface{}) error {
if !strings.Contains(reflect.TypeOf(v).String(), "interface {}") {
return e.writeTypedList(v)
}
return e.writeUntypedList(v)
}
// writeTypedList write typed list
// Include 3 formats:
// ::= x55 type value* 'Z' # variable-length list
// ::= 'V' type int value* # fixed-length list
// ::= [x70-77] type value* # fixed-length typed list
func (e *Encoder) writeTypedList(v interface{}) error {
var err error
value := reflect.ValueOf(v)
// https://github.com/apache/dubbo-go-hessian2/issues/317
// if list is null, just return 'N'
if value.IsNil() {
e.buffer = encByte(e.buffer, BC_NULL) // 'N'
return nil
}
// check ref
if n, ok := e.checkRefMap(value); ok {
e.buffer = encRef(e.buffer, n)
return nil
}
// try to get list type name of the value type first, for hessian support pointer type.
// if not found, try to get list type name of the unpacked type.
typeName := getListTypeName(value.Type().String())
if typeName == "" {
value = UnpackPtrValue(value)
goType := UnpackPtrType(value.Type())
toType := combineGoTypeName(goType)
typeName = getListTypeName(toType)
if typeName == "" {
return perrors.New("no this type name: " + toType)
}
}
e.buffer = encByte(e.buffer, BC_LIST_FIXED) // 'V'
e.buffer = encString(e.buffer, typeName)
e.buffer = encInt32(e.buffer, int32(value.Len()))
for i := 0; i < value.Len(); i++ {
if err = e.Encode(value.Index(i).Interface()); err != nil {
return err
}
}
return nil
}
// writeUntypedList write untyped list
// Include 3 formats:
// ::= x57 value* 'Z' # variable-length untyped list
// ::= x58 int value* # fixed-length untyped list
// ::= [x78-7f] value* # fixed-length untyped list
func (e *Encoder) writeUntypedList(v interface{}) error {
var err error
value := reflect.ValueOf(v)
// check ref
if n, ok := e.checkRefMap(value); ok {
e.buffer = encRef(e.buffer, n)
return nil
}
value = UnpackPtrValue(value)
e.buffer = encByte(e.buffer, BC_LIST_FIXED_UNTYPED) // x58
e.buffer = encInt32(e.buffer, int32(value.Len()))
for i := 0; i < value.Len(); i++ {
if err = e.Encode(value.Index(i).Interface()); err != nil {
return err
}
}
return nil
}
/////////////////////////////////////////
// List
/////////////////////////////////////////
// # list/vector
// ::= x55 type value* 'Z' # variable-length list
// ::= 'V' type int value* # fixed-length list
// ::= x57 value* 'Z' # variable-length untyped list
// ::= x58 int value* # fixed-length untyped list
// ::= [x70-77] type value* # fixed-length typed list
// ::= [x78-7f] value* # fixed-length untyped list
func (d *Decoder) readBufByte() (byte, error) {
var (
err error
buf [1]byte
)
_, err = io.ReadFull(d.reader, buf[:1])
if err != nil {
return 0, perrors.WithStack(err)
}
return buf[0], nil
}
func listFixedTypedLenTag(tag byte) bool {
return tag >= _listFixedTypedLenTagMin && tag <= _listFixedTypedLenTagMax
}
// list include 3 formats:
// ::= x55 type value* 'Z' # variable-length list
// ::= 'V' type int value* # fixed-length list
// ::= [x70-77] type value* # fixed-length typed list
func typedListTag(tag byte) bool {
return tag == BC_LIST_FIXED || tag == BC_LIST_VARIABLE || listFixedTypedLenTag(tag)
}
func listFixedUntypedLenTag(tag byte) bool {
return tag >= _listFixedUntypedLenTagMin && tag <= _listFixedUntypedLenTagMax
}
// include 3 formats:
// ::= x57 value* 'Z' # variable-length untyped list
// ::= x58 int value* # fixed-length untyped list
// ::= [x78-7f] value* # fixed-length untyped list
func untypedListTag(tag byte) bool {
return tag == BC_LIST_FIXED_UNTYPED || tag == BC_LIST_VARIABLE_UNTYPED || listFixedUntypedLenTag(tag)
}
// decList read list
func (d *Decoder) decList(flag int32) (interface{}, error) {
var (
err error
tag byte
)
if flag != TAG_READ {
tag = byte(flag)
} else {
tag, err = d.ReadByte()
if err != nil {
return nil, perrors.WithStack(err)
}
}
switch {
case tag == BC_NULL:
return nil, nil
case tag == BC_REF:
return d.decRef(int32(tag))
case typedListTag(tag):
return d.readTypedList(tag)
case untypedListTag(tag):
return d.readUntypedList(tag)
case binaryTag(tag):
return d.decBinary(int32(tag))
default:
return nil, perrors.Errorf("error list tag: 0x%x", tag)
}
}
// readTypedList read typed list
// list include 3 formats:
// ::= x55 type value* 'Z' # variable-length list
// ::= 'V' type int value* # fixed-length list
// ::= [x70-77] type value* # fixed-length typed list
func (d *Decoder) readTypedList(tag byte) (interface{}, error) {
listTyp, err := d.decString(TAG_READ)
if err != nil {
return nil, perrors.Errorf("error to read list type[%s]: %v", listTyp, err)
}
isVariableArr := tag == BC_LIST_VARIABLE
var length int
if listFixedTypedLenTag(tag) {
length = int(tag - _listFixedTypedLenTagMin)
} else if tag == BC_LIST_FIXED {
ii, err := d.decInt32(TAG_READ)
if err != nil {
return nil, perrors.WithStack(err)
}
length = int(ii)
} else if isVariableArr {
length = 0
} else {
return nil, perrors.Errorf("error typed list tag: 0x%x", tag)
}
if isCollectionSerialize(listTyp) {
return d.decodeCollection(length, listTyp)
}
return d.readTypedListValue(length, listTyp, isVariableArr)
}
func (d *Decoder) readTypedListValue(length int, listTyp string, isVariableArr bool) (interface{}, error) {
// return when no element
if length < 0 {
return nil, nil
}
var (
aryValue reflect.Value
arrType reflect.Type
)
t, err := strconv.Atoi(listTyp)
if err == nil {
// find the ref list type
arrType = d.typeRefs.Get(t)
if arrType == nil {
return nil, perrors.Errorf("can't find ref list type at index %d", t)
}
aryValue = reflect.MakeSlice(arrType, length, length)
} else {
// try to find the registered list type
arrType = getListType(listTyp)
if arrType != nil {
aryValue = reflect.MakeSlice(arrType, length, length)
d.typeRefs.appendTypeRefs(listTyp, arrType)
} else {
// using default generic list type if not found registered
aryValue = reflect.ValueOf(make([]interface{}, length, length))
d.typeRefs.appendTypeRefs(listTyp, aryValue.Type())
}
}
holder := d.appendRefs(aryValue)
for j := 0; j < length || isVariableArr; j++ {
it, err := d.DecodeValue()
if err != nil {
if perrors.Is(err, io.EOF) && isVariableArr {
break
}
return nil, perrors.WithStack(err)
}
if isVariableArr {
if it != nil {
aryValue = reflect.Append(aryValue, EnsureRawValue(it))
} else {
aryValue = reflect.Append(aryValue, reflect.Zero(aryValue.Type().Elem()))
}
holder.change(aryValue)
} else {
if it != nil {
//aryValue.Index(j).Set(EnsureRawValue(it))
SetValue(aryValue.Index(j), EnsureRawValue(it))
}
}
}
return holder, nil
}
// readUntypedList read untyped list
// Include 3 formats:
// ::= x57 value* 'Z' # variable-length untyped list
// ::= x58 int value* # fixed-length untyped list
// ::= [x78-7f] value* # fixed-length untyped list
func (d *Decoder) readUntypedList(tag byte) (interface{}, error) {
isVariableArr := tag == BC_LIST_VARIABLE_UNTYPED
var length int
if listFixedUntypedLenTag(tag) {
length = int(tag - _listFixedUntypedLenTagMin)
} else if tag == BC_LIST_FIXED_UNTYPED {
ii, err := d.decInt32(TAG_READ)
if err != nil {
return nil, perrors.WithStack(err)
}
length = int(ii)
} else if isVariableArr {
length = 0
} else {
return nil, perrors.Errorf("error untyped list tag: %x", tag)
}
ary := make([]interface{}, length)
aryValue := reflect.ValueOf(ary)
holder := d.appendRefs(aryValue)
for j := 0; j < length || isVariableArr; j++ {
it, err := d.DecodeValue()
if err != nil {
if perrors.Is(err, io.EOF) && isVariableArr {
break
}
return nil, perrors.WithStack(err)
}
if isVariableArr {
if it != nil {
aryValue = reflect.Append(aryValue, EnsureRawValue(it))
} else {
aryValue = reflect.Append(aryValue, reflect.Zero(aryValue.Type().Elem()))
}
holder.change(aryValue)
} else {
ary[j] = EnsureRawAny(it)
}
}
return holder, nil
}