github.com/m3db/m3@v1.5.0/src/query/block/series_iter.go (about)

     1  // Copyright (c) 2020 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package block
    22  
    23  // NewUnconsolidatedSeriesIter returns a new unconsolidated series iterator.
    24  func NewUnconsolidatedSeriesIter(
    25  	series []UnconsolidatedSeries,
    26  ) SeriesIter {
    27  	metas := make([]SeriesMeta, 0, len(series))
    28  	for _, elem := range series {
    29  		metas = append(metas, elem.Meta)
    30  	}
    31  	return &unconsolidatedSeriesIter{
    32  		idx:    -1,
    33  		series: series,
    34  		metas:  metas,
    35  	}
    36  }
    37  
    38  type unconsolidatedSeriesIter struct {
    39  	idx    int
    40  	series []UnconsolidatedSeries
    41  	metas  []SeriesMeta
    42  }
    43  
    44  func (i *unconsolidatedSeriesIter) Next() bool {
    45  	i.idx++
    46  	if i.idx >= len(i.series) {
    47  		return false
    48  	}
    49  	return true
    50  }
    51  
    52  func (i *unconsolidatedSeriesIter) Err() error {
    53  	return nil
    54  }
    55  
    56  func (i *unconsolidatedSeriesIter) Close() {
    57  }
    58  
    59  func (i *unconsolidatedSeriesIter) SeriesMeta() []SeriesMeta {
    60  	return i.metas
    61  }
    62  
    63  func (i *unconsolidatedSeriesIter) SeriesCount() int {
    64  	return len(i.series)
    65  }
    66  
    67  func (i *unconsolidatedSeriesIter) Current() UnconsolidatedSeries {
    68  	return i.series[i.idx]
    69  }