164 lines
4.2 KiB
Go
164 lines
4.2 KiB
Go
/*
|
|
* Copyright 2021 ByteDance Inc.
|
|
*
|
|
* 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 ast
|
|
|
|
import (
|
|
`fmt`
|
|
|
|
`github.com/bytedance/sonic/internal/native/types`
|
|
)
|
|
|
|
type Pair struct {
|
|
Key string
|
|
Value Node
|
|
}
|
|
|
|
// Values returns iterator for array's children traversal
|
|
func (self *Node) Values() (ListIterator, error) {
|
|
if err := self.should(types.V_ARRAY, "an array"); err != nil {
|
|
return ListIterator{}, err
|
|
}
|
|
return ListIterator{Iterator{p: self}}, nil
|
|
}
|
|
|
|
// Properties returns iterator for object's children traversal
|
|
func (self *Node) Properties() (ObjectIterator, error) {
|
|
if err := self.should(types.V_OBJECT, "an object"); err != nil {
|
|
return ObjectIterator{}, err
|
|
}
|
|
return ObjectIterator{Iterator{p: self}}, nil
|
|
}
|
|
|
|
type Iterator struct {
|
|
i int
|
|
p *Node
|
|
}
|
|
|
|
func (self *Iterator) Pos() int {
|
|
return self.i
|
|
}
|
|
|
|
func (self *Iterator) Len() int {
|
|
return self.p.len()
|
|
}
|
|
|
|
// HasNext reports if it is the end of iteration or has error.
|
|
func (self *Iterator) HasNext() bool {
|
|
if !self.p.isLazy() {
|
|
return self.p.Valid() && self.i < self.p.len()
|
|
} else if self.p.t == _V_ARRAY_LAZY {
|
|
return self.p.skipNextNode().Valid()
|
|
} else if self.p.t == _V_OBJECT_LAZY {
|
|
pair := self.p.skipNextPair()
|
|
if pair == nil {
|
|
return false
|
|
}
|
|
return pair.Value.Valid()
|
|
}
|
|
return false
|
|
}
|
|
|
|
// ListIterator is specialized iterator for V_ARRAY
|
|
type ListIterator struct {
|
|
Iterator
|
|
}
|
|
|
|
// ObjectIterator is specialized iterator for V_ARRAY
|
|
type ObjectIterator struct {
|
|
Iterator
|
|
}
|
|
|
|
// Next scans through children of underlying V_ARRAY,
|
|
// copies each child to v, and returns .HasNext().
|
|
func (self *ListIterator) Next(v *Node) bool {
|
|
if !self.HasNext() {
|
|
return false
|
|
} else {
|
|
*v, self.i = *self.p.nodeAt(self.i), self.i + 1
|
|
return true
|
|
}
|
|
}
|
|
|
|
// Next scans through children of underlying V_OBJECT,
|
|
// copies each child to v, and returns .HasNext().
|
|
func (self *ObjectIterator) Next(p *Pair) bool {
|
|
if !self.HasNext() {
|
|
return false
|
|
} else {
|
|
*p, self.i = *self.p.pairAt(self.i), self.i + 1
|
|
return true
|
|
}
|
|
}
|
|
|
|
// Sequence represents scanning path of single-layer nodes.
|
|
// Index indicates the value's order in both V_ARRAY and V_OBJECT json.
|
|
// Key is the value's key (for V_OBJECT json only, otherwise it will be nil).
|
|
type Sequence struct {
|
|
Index int
|
|
Key *string
|
|
// Level int
|
|
}
|
|
|
|
// String is string representation of one Sequence
|
|
func (s Sequence) String() string {
|
|
k := ""
|
|
if s.Key != nil {
|
|
k = *s.Key
|
|
}
|
|
return fmt.Sprintf("Sequence(%d, %q)", s.Index, k)
|
|
}
|
|
|
|
type Scanner func(path Sequence, node *Node) bool
|
|
|
|
// ForEach scans one V_OBJECT node's children from JSON head to tail,
|
|
// and pass the Sequence and Node of corresponding JSON value.
|
|
//
|
|
// Especailly, if the node is not V_ARRAY or V_OBJECT,
|
|
// the node itself will be returned and Sequence.Index == -1.
|
|
func (self *Node) ForEach(sc Scanner) error {
|
|
switch self.itype() {
|
|
case types.V_ARRAY:
|
|
ns, err := self.UnsafeArray()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
for i := range ns {
|
|
if !sc(Sequence{i, nil}, &ns[i]) {
|
|
return err
|
|
}
|
|
}
|
|
case types.V_OBJECT:
|
|
ns, err := self.UnsafeMap()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
for i := range ns {
|
|
if !sc(Sequence{i, &ns[i].Key}, &ns[i].Value) {
|
|
return err
|
|
}
|
|
}
|
|
default:
|
|
sc(Sequence{-1, nil}, self)
|
|
}
|
|
return self.Check()
|
|
}
|
|
|
|
type PairSlice []Pair
|
|
|
|
func (self PairSlice) Sort() {
|
|
radixQsort(self, 0, maxDepth(len(self)))
|
|
} |