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package memory
import (
"fmt"
"gopkg.in/src-d/go-git.v2/core"
)
var ErrUnsupportedObjectType = fmt.Errorf("unsupported object type")
// ObjectStorage is the implementation of core.ObjectStorage for memory.Object
type ObjectStorage struct {
Objects map[core.Hash]core.Object
Commits map[core.Hash]core.Object
Trees map[core.Hash]core.Object
Blobs map[core.Hash]core.Object
}
// NewObjectStorage returns a new empty ObjectStorage
func NewObjectStorage() *ObjectStorage {
return &ObjectStorage{
Objects: make(map[core.Hash]core.Object, 0),
Commits: make(map[core.Hash]core.Object, 0),
Trees: make(map[core.Hash]core.Object, 0),
Blobs: make(map[core.Hash]core.Object, 0),
}
}
// New returns a new empty memory.Object
func (o *ObjectStorage) New() (core.Object, error) {
return &Object{}, nil
}
// Set stores an object, the object should be properly filled before set it.
func (o *ObjectStorage) Set(obj core.Object) (core.Hash, error) {
h := obj.Hash()
o.Objects[h] = obj
switch obj.Type() {
case core.CommitObject:
o.Commits[h] = o.Objects[h]
case core.TreeObject:
o.Trees[h] = o.Objects[h]
case core.BlobObject:
o.Blobs[h] = o.Objects[h]
default:
return h, ErrUnsupportedObjectType
}
return h, nil
}
// Get returns a object with the given hash
func (o *ObjectStorage) Get(h core.Hash) (core.Object, error) {
obj, ok := o.Objects[h]
if !ok {
return nil, core.ObjectNotFoundErr
}
return obj, nil
}
// Iter returns a core.ObjectIter for the given core.ObjectTybe
func (o *ObjectStorage) Iter(t core.ObjectType) core.ObjectIter {
var series []core.Object
switch t {
case core.CommitObject:
series = flattenObjectMap(o.Commits)
case core.TreeObject:
series = flattenObjectMap(o.Trees)
case core.BlobObject:
series = flattenObjectMap(o.Blobs)
}
return core.NewObjectSliceIter(series)
}
func flattenObjectMap(m map[core.Hash]core.Object) []core.Object {
objects := make([]core.Object, 0, len(m))
for _, obj := range m {
objects = append(objects, obj)
}
return objects
}
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