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series_iterators.go
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/
series_iterators.go
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// Copyright (c) 2016 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package encoding
type seriesIterators struct {
iters []SeriesIterator
closed bool
pool MutableSeriesIteratorsPool
}
// NewSeriesIterators creates a new series iterators collection
func NewSeriesIterators(
iters []SeriesIterator,
pool MutableSeriesIteratorsPool,
) MutableSeriesIterators {
return &seriesIterators{iters: iters}
}
func (iters *seriesIterators) Iters() []SeriesIterator {
return iters.iters
}
func (iters *seriesIterators) Close() {
if iters.closed {
return
}
iters.closed = true
for i := range iters.iters {
if iters.iters[i] != nil {
iters.iters[i].Close()
iters.iters[i] = nil
}
}
if iters.pool != nil {
iters.pool.Put(iters)
}
}
func (iters *seriesIterators) Len() int {
return len(iters.iters)
}
func (iters *seriesIterators) Cap() int {
return cap(iters.iters)
}
func (iters *seriesIterators) SetAt(idx int, iter SeriesIterator) {
iters.iters[idx] = iter
}
func (iters *seriesIterators) Reset(size int) {
for i := range iters.iters {
iters.iters[i] = nil
}
iters.iters = iters.iters[:size]
}
// EmptySeriesIterators is an empty SeriesIterators.
var EmptySeriesIterators SeriesIterators = emptyIters{}
type emptyIters struct{}
func (e emptyIters) Iters() []SeriesIterator { return nil }
func (e emptyIters) Len() int { return 0 }
func (e emptyIters) Close() {}