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dbIt to iter

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This commit is contained in:
Barak Michener 2014-07-03 15:59:50 -04:00
parent 82f3fc7bfa
commit 468d943039
2 changed files with 28 additions and 28 deletions
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28
graph/leveldb/iterator.go
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@ -31,7 +31,7 @@ type Iterator struct {
checkId []byte
dir string
open bool
dbIt iterator.Iterator
iter iterator.Iterator
ts *TripleStore
ro *opt.ReadOptions
originalPrefix string
@ -48,26 +48,26 @@ func NewIterator(prefix, dir string, value graph.TSVal, ts *TripleStore) *Iterat
it.nextPrefix = append(it.nextPrefix, []byte(it.checkId[1:])...)
it.ro = &opt.ReadOptions{}
it.ro.DontFillCache = true
it.dbIt = ts.db.NewIterator(nil, it.ro)
it.iter = ts.db.NewIterator(nil, it.ro)
it.open = true
it.ts = ts
ok := it.dbIt.Seek(it.nextPrefix)
ok := it.iter.Seek(it.nextPrefix)
if !ok {
it.open = false
it.dbIt.Release()
it.iter.Release()
}
return &it
}
func (it *Iterator) Reset() {
if !it.open {
it.dbIt = it.ts.db.NewIterator(nil, it.ro)
it.iter = it.ts.db.NewIterator(nil, it.ro)
it.open = true
}
ok := it.dbIt.Seek(it.nextPrefix)
ok := it.iter.Seek(it.nextPrefix)
if !ok {
it.open = false
it.dbIt.Release()
it.iter.Release()
}
}
@ -79,13 +79,13 @@ func (it *Iterator) Clone() graph.Iterator {
func (it *Iterator) Close() {
if it.open {
it.dbIt.Release()
it.iter.Release()
it.open = false
}
}
func (it *Iterator) Next() (graph.TSVal, bool) {
if it.dbIt == nil {
if it.iter == nil {
it.Last = nil
return nil, false
}
@ -93,16 +93,16 @@ func (it *Iterator) Next() (graph.TSVal, bool) {
it.Last = nil
return nil, false
}
if !it.dbIt.Valid() {
if !it.iter.Valid() {
it.Last = nil
it.Close()
return nil, false
}
if bytes.HasPrefix(it.dbIt.Key(), it.nextPrefix) {
out := make([]byte, len(it.dbIt.Key()))
copy(out, it.dbIt.Key())
if bytes.HasPrefix(it.iter.Key(), it.nextPrefix) {
out := make([]byte, len(it.iter.Key()))
copy(out, it.iter.Key())
it.Last = out
ok := it.dbIt.Next()
ok := it.iter.Next()
if !ok {
it.Close()
}