78 lines
2.0 KiB
Go
78 lines
2.0 KiB
Go
// Copyright (c) 2014 Couchbase, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package collector
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import "github.com/blevesearch/bleve/search"
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type collectStoreSlice struct {
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slice search.DocumentMatchCollection
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compare collectorCompare
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}
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func newStoreSlice(cap int, compare collectorCompare) *collectStoreSlice {
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rv := &collectStoreSlice{
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slice: make(search.DocumentMatchCollection, 0, cap),
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compare: compare,
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}
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return rv
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}
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func (c *collectStoreSlice) AddNotExceedingSize(doc *search.DocumentMatch,
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size int) *search.DocumentMatch {
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c.add(doc)
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if c.len() > size {
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return c.removeLast()
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}
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return nil
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}
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func (c *collectStoreSlice) add(doc *search.DocumentMatch) {
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// find where to insert, starting at end (lowest)
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i := len(c.slice)
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for ; i > 0; i-- {
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cmp := c.compare(doc, c.slice[i-1])
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if cmp >= 0 {
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break
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}
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}
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// insert at i
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c.slice = append(c.slice, nil)
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copy(c.slice[i+1:], c.slice[i:])
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c.slice[i] = doc
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}
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func (c *collectStoreSlice) removeLast() *search.DocumentMatch {
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var rv *search.DocumentMatch
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rv, c.slice = c.slice[len(c.slice)-1], c.slice[:len(c.slice)-1]
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return rv
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}
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func (c *collectStoreSlice) Final(skip int, fixup collectorFixup) (search.DocumentMatchCollection, error) {
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for i := skip; i < len(c.slice); i++ {
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err := fixup(c.slice[i])
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if err != nil {
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return nil, err
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}
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}
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if skip <= len(c.slice) {
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return c.slice[skip:], nil
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}
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return search.DocumentMatchCollection{}, nil
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}
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func (c *collectStoreSlice) len() int {
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return len(c.slice)
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}
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