71 lines
1.8 KiB
Go
71 lines
1.8 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 analysis
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import (
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index "github.com/blevesearch/bleve_index_api"
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)
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func TokenFrequency(tokens TokenStream, arrayPositions []uint64, options index.FieldIndexingOptions) index.TokenFrequencies {
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rv := make(map[string]*index.TokenFreq, len(tokens))
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if options.IncludeTermVectors() {
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tls := make([]index.TokenLocation, len(tokens))
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tlNext := 0
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for _, token := range tokens {
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tls[tlNext] = index.TokenLocation{
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ArrayPositions: arrayPositions,
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Start: token.Start,
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End: token.End,
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Position: token.Position,
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}
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curr, ok := rv[string(token.Term)]
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if ok {
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curr.Locations = append(curr.Locations, &tls[tlNext])
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} else {
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curr = &index.TokenFreq{
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Term: token.Term,
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Locations: []*index.TokenLocation{&tls[tlNext]},
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}
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rv[string(token.Term)] = curr
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}
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if !options.SkipFreqNorm() {
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curr.SetFrequency(curr.Frequency() + 1)
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}
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tlNext++
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}
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} else {
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for _, token := range tokens {
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curr, exists := rv[string(token.Term)]
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if !exists {
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curr = &index.TokenFreq{
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Term: token.Term,
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}
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rv[string(token.Term)] = curr
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}
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if !options.SkipFreqNorm() {
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curr.SetFrequency(curr.Frequency() + 1)
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}
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}
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}
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return rv
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}
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