b1a70d99aa
This change allows a Nexter to be used in the same manner as a scanner
using a for graph.Next(it) {} construction.
It is important that graph.Next(it) and any associated it.Result() calls
operate on the same iterator.
48 lines
1.2 KiB
Go
48 lines
1.2 KiB
Go
// Copyright 2014 The Cayley Authors. All rights reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package memstore
|
|
|
|
import (
|
|
"github.com/google/cayley/graph"
|
|
"github.com/google/cayley/graph/iterator"
|
|
)
|
|
|
|
type AllIterator struct {
|
|
iterator.Int64
|
|
ts *TripleStore
|
|
}
|
|
|
|
func NewMemstoreAllIterator(ts *TripleStore) *AllIterator {
|
|
var out AllIterator
|
|
out.Int64 = *iterator.NewInt64(1, ts.idCounter-1)
|
|
out.ts = ts
|
|
return &out
|
|
}
|
|
|
|
// No subiterators.
|
|
func (it *AllIterator) SubIterators() []graph.Iterator {
|
|
return nil
|
|
}
|
|
|
|
func (it *AllIterator) Next() bool {
|
|
if !it.Int64.Next() {
|
|
return false
|
|
}
|
|
_, ok := it.ts.revIdMap[it.Int64.Result().(int64)]
|
|
if !ok {
|
|
return it.Next()
|
|
}
|
|
return true
|
|
}
|