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all_iterator.go
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all_iterator.go
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// 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
}
type NodesAllIterator AllIterator
type QuadsAllIterator AllIterator
func NewMemstoreNodesAllIterator(ts *TripleStore) *NodesAllIterator {
var out NodesAllIterator
out.Int64 = *iterator.NewInt64(1, ts.idCounter-1)
out.ts = ts
return &out
}
// No subiterators.
func (it *NodesAllIterator) SubIterators() []graph.Iterator {
return nil
}
func (it *NodesAllIterator) Next() bool {
if !it.Int64.Next() {
return false
}
_, ok := it.ts.revIdMap[it.Int64.Result().(int64)]
if !ok {
return it.Next()
}
return true
}
func NewMemstoreQuadsAllIterator(ts *TripleStore) *QuadsAllIterator {
var out QuadsAllIterator
out.Int64 = *iterator.NewInt64(1, ts.quadIdCounter-1)
out.ts = ts
return &out
}
func (qit *QuadsAllIterator) Next() bool {
out := qit.Int64.Next()
if out {
i64 := qit.Int64.Result().(int64)
if qit.ts.log[i64].DeletedBy != 0 || qit.ts.log[i64].Action == graph.Delete {
return qit.Next()
}
}
return out
}