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package rdb
// Copyright 2014 Wandoujia Inc. All Rights Reserved.
// Licensed under the MIT (MIT-LICENSE.txt) license.
import "fmt"
import (
"github.com/cupcake/rdb"
"github.com/cupcake/rdb/nopdecoder"
)
func DecodeDump(p []byte) (interface{}, error) {
d := &decoder{}
if err := rdb.DecodeDump(p, 0, nil, 0, d); err != nil {
return nil, err
}
return d.obj, d.err
}
type decoder struct {
nopdecoder.NopDecoder
obj interface{}
err error
}
func (d *decoder) initObject(obj interface{}) {
if d.err != nil {
return
}
if d.obj != nil {
d.err = fmt.Errorf("invalid object, init again")
} else {
d.obj = obj
}
}
func (d *decoder) Set(key, value []byte, expiry int64) {
d.initObject(String(value))
}
func (d *decoder) StartHash(key []byte, length, expiry int64) {
d.initObject(Hash(nil))
}
func (d *decoder) Hset(key, field, value []byte) {
if d.err != nil {
return
}
switch h := d.obj.(type) {
default:
d.err = fmt.Errorf("invalid object, not a hashmap")
case Hash:
v := struct {
Field, Value []byte
}{
field,
value,
}
d.obj = append(h, v)
}
}
func (d *decoder) StartSet(key []byte, cardinality, expiry int64) {
d.initObject(Set(nil))
}
func (d *decoder) Sadd(key, member []byte) {
if d.err != nil {
return
}
switch s := d.obj.(type) {
default:
d.err = fmt.Errorf("invalid object, not a set")
case Set:
d.obj = append(s, member)
}
}
func (d *decoder) StartList(key []byte, length, expiry int64) {
d.initObject(List(nil))
}
func (d *decoder) Rpush(key, value []byte) {
if d.err != nil {
return
}
switch l := d.obj.(type) {
default:
d.err = fmt.Errorf("invalid object, not a list")
case List:
d.obj = append(l, value)
}
}
func (d *decoder) StartZSet(key []byte, cardinality, expiry int64) {
d.initObject(ZSet(nil))
}
func (d *decoder) Zadd(key []byte, score float64, member []byte) {
if d.err != nil {
return
}
switch z := d.obj.(type) {
default:
d.err = fmt.Errorf("invalid object, not a zset")
case ZSet:
v := struct {
Member []byte
Score float64
}{
member,
score,
}
d.obj = append(z, v)
}
}
type String []byte
type List [][]byte
type Hash []struct {
Field, Value []byte
}
type Set [][]byte
type ZSet []struct {
Member []byte
Score float64
}
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