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ledger_generic.go
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/
ledger_generic.go
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// Note: This file generate CURD code by genny automatically (https://github.com/cheekybits/genny)
// Usage:
// - install gen, command is ` go get github.com/cheekybits/genny
// - create type in /common/types package, example: StateBlock, Hash
// - generate code, command is ` cat ledger_generic.go | genny gen "GenericType=StateBlock GenericKey=Hash" > ledger_type.go `
// - generate testcase code, command is ` cat ledger_generic_test.go | genny gen "GenericType=StateBlock GenericKey=Hash" > ledger_type_test.go `
package ledger
import (
"errors"
"github.com/qlcchain/go-qlc/common/storage"
"github.com/qlcchain/go-qlc/common/types"
)
var (
ErrGenericTypeExists = errors.New("the GenericType is empty")
ErrGenericTypeNotFound = errors.New("GenericType not found")
)
type GenericStore interface {
AddGenericType(key *types.GenericKey, value *types.GenericType) error
GetGenericType(key *types.GenericKey) (*types.GenericType, error)
DeleteGenericType(key *types.GenericKey) error
UpdateGenericType(key *types.GenericKey, value *types.GenericType) error
AddOrUpdateGenericType(key *types.GenericKey, value *types.GenericType) error
GetGenericTypes(fn func(key *types.GenericKey, value *types.GenericType) error) error
HasGenericType(key *types.GenericKey) (bool, error)
CountGenericTypes() (uint64, error)
}
func (l *Ledger) AddGenericType(key *types.GenericKey, value *types.GenericType) error {
k, err := storage.GetKeyOfParts(storage.KeyPrefixGenericType, key)
if err != nil {
return err
}
v, err := value.Serialize()
if err != nil {
return err
}
if _, err := l.store.Get(k); err == nil {
return ErrGenericTypeExists
} else if err != storage.KeyNotFound {
return err
}
return l.store.Put(k, v)
}
func (l *Ledger) GetGenericType(key *types.GenericKey) (*types.GenericType, error) {
k, err := storage.GetKeyOfParts(storage.KeyPrefixGenericType, key)
if err != nil {
return nil, err
}
value := new(types.GenericType)
v, err := l.store.Get(k)
if err != nil {
if err == storage.KeyNotFound {
return nil, ErrGenericTypeNotFound
}
return nil, err
}
if err := value.Deserialize(v); err != nil {
return nil, err
}
return value, nil
}
func (l *Ledger) DeleteGenericType(key *types.GenericKey) error {
k, err := storage.GetKeyOfParts(storage.KeyPrefixGenericType, key)
if err != nil {
return err
}
_, err = l.store.Get(k)
if err != nil {
if err == storage.KeyNotFound {
return ErrGenericTypeNotFound
}
return err
}
return l.store.Delete(k)
}
func (l *Ledger) UpdateGenericType(key *types.GenericKey, value *types.GenericType) error {
k, err := storage.GetKeyOfParts(storage.KeyPrefixGenericType, key)
if err != nil {
return err
}
_, err = l.store.Get(k)
if err != nil {
if err == storage.KeyNotFound {
return ErrGenericTypeNotFound
}
return err
}
v, err := value.Serialize()
if err != nil {
return err
}
return l.store.Put(k, v)
}
func (l *Ledger) AddOrUpdateGenericType(key *types.GenericKey, value *types.GenericType) error {
k, err := storage.GetKeyOfParts(storage.KeyPrefixGenericType, key)
if err != nil {
return err
}
v, err := value.Serialize()
if err != nil {
return err
}
return l.store.Put(k, v)
}
func (l *Ledger) GetGenericTypes(fn func(key *types.GenericKey, value *types.GenericType) error) error {
prefix, _ := storage.GetKeyOfParts(storage.KeyPrefixGenericType)
return l.store.Iterator(prefix, nil, func(k []byte, v []byte) error {
key := new(types.GenericKey)
if err := key.Deserialize(k[1:]); err != nil {
return err
}
value := new(types.GenericType)
if err := value.Deserialize(v); err != nil {
return err
}
if err := fn(key, value); err != nil {
return err
}
return nil
})
}
func (l *Ledger) HasGenericType(key *types.GenericKey) (bool, error) {
k, err := storage.GetKeyOfParts(storage.KeyPrefixGenericType, key)
if err != nil {
return false, err
}
return l.store.Has(k)
}
func (l *Ledger) CountGenericTypes() (uint64, error) {
return l.store.Count([]byte{storage.KeyPrefixGenericType})
}