本文整理汇总了Golang中github.com/ipfs/go-blocks/Godeps/_workspace/src/github.com/jbenet/go-datastore.Key类的典型用法代码示例。如果您正苦于以下问题：Golang Key类的具体用法？Golang Key怎么用？Golang Key使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了Key类的10个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Golang代码示例。
示例1: Delete
func (d *datastore) Delete(key ds.Key) (err error) {
err = d.DB.Delete(key.Bytes(), nil)
if err == leveldb.ErrNotFound {
return ds.ErrNotFound
}
return err
}示例2: ConvertKey
// ConvertKey returns a B58 encoded Datastore key
// TODO: this is hacky because it encodes every path component. some
// path components may be proper strings already...
func (b58KeyConverter) ConvertKey(dsk ds.Key) ds.Key {
k := ds.NewKey("/")
for _, n := range dsk.Namespaces() {
k = k.ChildString(b58.Encode([]byte(n)))
}
return k
}示例3: Put
// Returns ErrInvalidType if value is not of type []byte.
//
// Note: using sync = false.
// see http://godoc.org/github.com/syndtr/goleveldb/leveldb/opt#WriteOptions
func (d *datastore) Put(key ds.Key, value interface{}) (err error) {
val, ok := value.([]byte)
if !ok {
return ds.ErrInvalidType
}
return d.DB.Put(key.Bytes(), val, nil)
}示例4: Get
func (d *datastore) Get(key ds.Key) (value interface{}, err error) {
val, err := d.DB.Get(key.Bytes(), nil)
if err != nil {
if err == leveldb.ErrNotFound {
return nil, ds.ErrNotFound
}
return nil, err
}
return val, nil
}示例5: PrefixTransform
// PrefixTransform constructs a KeyTransform with a pair of functions that
// add or remove the given prefix key.
//
// Warning: will panic if prefix not found when it should be there. This is
// to avoid insidious data inconsistency errors.
func PrefixTransform(prefix ds.Key) ktds.KeyTransform {
return &ktds.Pair{
// Convert adds the prefix
Convert: func(k ds.Key) ds.Key {
return prefix.Child(k)
},
// Invert removes the prefix. panics if prefix not found.
Invert: func(k ds.Key) ds.Key {
if !prefix.IsAncestorOf(k) {
fmt.Errorf("Expected prefix (%s) in key (%s)", prefix, k)
panic("expected prefix not found")
}
s := strings.TrimPrefix(k.String(), prefix.String())
return ds.NewKey(s)
},
}
}示例6: Has
func (d *Datastore) Has(key ds.Key) (exists bool, err error) {
id := d.KeyHash(key)
return core.Exists(false, d.Index(key), key.Type(), id)
}示例7: Index
// Returns the ElasticSearch index for given key. If the datastore specifies
// an index, use that. Else, key.Parent
func (d *Datastore) Index(key ds.Key) string {
if len(d.index) > 0 {
return d.index
}
return key.Parent().BaseNamespace()
}示例8: BlakeKeyHash
// Hash a key and return the first 16 hex chars of its blake2b hash.
// basically: Blake2b(key).HexString[:16]
func BlakeKeyHash(key ds.Key) string {
h := blake2.NewBlake2B()
h.Write(key.Bytes())
d := h.Sum(nil)
return fmt.Sprintf("%x", d)[:16]
}示例9: KeyFromDsKey
// KeyFromDsKey returns a Datastore key
func KeyFromDsKey(dsk ds.Key) Key {
return Key(dsk.String()[1:])
}示例10: KeyFilename
// KeyFilename returns the filename associated with `key`
func (d *Datastore) KeyFilename(key ds.Key) string {
return filepath.Join(d.path, key.String(), ObjectKeySuffix)
}