e188fe35f7
instead of separate DocumentMatch/DocumentMatchInternal rules are simple, everything operates on the IndexInternalID field until the results are returned, then ID is set correctly the IndexInternalID field is not exported to JSON
256 lines
6.7 KiB
Go
256 lines
6.7 KiB
Go
// Copyright (c) 2014 Couchbase, Inc.
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
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// except in compliance with the License. You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software distributed under the
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// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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// either express or implied. See the License for the specific language governing permissions
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// and limitations under the License.
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package search
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import (
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"sort"
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"github.com/blevesearch/bleve/index"
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)
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type FacetBuilder interface {
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Update(index.FieldTerms)
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Result() *FacetResult
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Field() string
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}
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type FacetsBuilder struct {
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indexReader index.IndexReader
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facets map[string]FacetBuilder
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}
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func NewFacetsBuilder(indexReader index.IndexReader) *FacetsBuilder {
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return &FacetsBuilder{
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indexReader: indexReader,
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facets: make(map[string]FacetBuilder, 0),
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}
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}
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func (fb *FacetsBuilder) Add(name string, facetBuilder FacetBuilder) {
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fb.facets[name] = facetBuilder
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}
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func (fb *FacetsBuilder) Update(docMatch *DocumentMatch) error {
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var fields []string
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for _, facetBuilder := range fb.facets {
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fields = append(fields, facetBuilder.Field())
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}
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fieldTerms, err := fb.indexReader.DocumentFieldTermsForFields(docMatch.IndexInternalID, fields)
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if err != nil {
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return err
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}
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for _, facetBuilder := range fb.facets {
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facetBuilder.Update(fieldTerms)
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}
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return nil
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}
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type TermFacet struct {
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Term string `json:"term"`
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Count int `json:"count"`
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}
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type TermFacets []*TermFacet
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func (tf TermFacets) Add(termFacet *TermFacet) TermFacets {
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for _, existingTerm := range tf {
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if termFacet.Term == existingTerm.Term {
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existingTerm.Count += termFacet.Count
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return tf
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}
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}
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// if we got here it wasn't already in the existing terms
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tf = append(tf, termFacet)
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return tf
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}
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func (tf TermFacets) Len() int { return len(tf) }
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func (tf TermFacets) Swap(i, j int) { tf[i], tf[j] = tf[j], tf[i] }
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func (tf TermFacets) Less(i, j int) bool {
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if tf[i].Count == tf[j].Count {
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return tf[i].Term < tf[j].Term
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}
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return tf[i].Count > tf[j].Count
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}
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type NumericRangeFacet struct {
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Name string `json:"name"`
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Min *float64 `json:"min,omitempty"`
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Max *float64 `json:"max,omitempty"`
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Count int `json:"count"`
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}
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type NumericRangeFacets []*NumericRangeFacet
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func (nrf NumericRangeFacets) Add(numericRangeFacet *NumericRangeFacet) NumericRangeFacets {
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for _, existingNr := range nrf {
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if numericRangeFacet.Min == existingNr.Min && numericRangeFacet.Max == existingNr.Max {
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existingNr.Count += numericRangeFacet.Count
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return nrf
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}
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}
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// if we got here it wasn't already in the existing terms
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nrf = append(nrf, numericRangeFacet)
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return nrf
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}
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func (nrf NumericRangeFacets) Len() int { return len(nrf) }
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func (nrf NumericRangeFacets) Swap(i, j int) { nrf[i], nrf[j] = nrf[j], nrf[i] }
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func (nrf NumericRangeFacets) Less(i, j int) bool {
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if nrf[i].Count == nrf[j].Count {
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return nrf[i].Name < nrf[j].Name
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}
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return nrf[i].Count > nrf[j].Count
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}
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type DateRangeFacet struct {
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Name string `json:"name"`
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Start *string `json:"start,omitempty"`
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End *string `json:"end,omitempty"`
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Count int `json:"count"`
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}
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func (drf *DateRangeFacet) Same(other *DateRangeFacet) bool {
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if drf.Start == nil && other.Start != nil {
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return false
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}
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if drf.Start != nil && other.Start == nil {
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return false
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}
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if drf.Start != nil && other.Start != nil && *drf.Start != *other.Start {
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return false
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}
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if drf.End == nil && other.End != nil {
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return false
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}
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if drf.End != nil && other.End == nil {
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return false
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}
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if drf.End != nil && other.End != nil && *drf.End != *other.End {
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return false
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}
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return true
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}
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type DateRangeFacets []*DateRangeFacet
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func (drf DateRangeFacets) Add(dateRangeFacet *DateRangeFacet) DateRangeFacets {
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for _, existingDr := range drf {
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if dateRangeFacet.Same(existingDr) {
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existingDr.Count += dateRangeFacet.Count
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return drf
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}
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}
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// if we got here it wasn't already in the existing terms
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drf = append(drf, dateRangeFacet)
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return drf
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}
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func (drf DateRangeFacets) Len() int { return len(drf) }
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func (drf DateRangeFacets) Swap(i, j int) { drf[i], drf[j] = drf[j], drf[i] }
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func (drf DateRangeFacets) Less(i, j int) bool {
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if drf[i].Count == drf[j].Count {
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return drf[i].Name < drf[j].Name
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}
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return drf[i].Count > drf[j].Count
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}
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type FacetResult struct {
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Field string `json:"field"`
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Total int `json:"total"`
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Missing int `json:"missing"`
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Other int `json:"other"`
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Terms TermFacets `json:"terms,omitempty"`
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NumericRanges NumericRangeFacets `json:"numeric_ranges,omitempty"`
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DateRanges DateRangeFacets `json:"date_ranges,omitempty"`
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}
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func (fr *FacetResult) Merge(other *FacetResult) {
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fr.Total += other.Total
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fr.Missing += other.Missing
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fr.Other += other.Other
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if fr.Terms != nil && other.Terms != nil {
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for _, term := range other.Terms {
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fr.Terms = fr.Terms.Add(term)
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}
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}
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if fr.NumericRanges != nil && other.NumericRanges != nil {
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for _, nr := range other.NumericRanges {
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fr.NumericRanges = fr.NumericRanges.Add(nr)
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}
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}
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if fr.DateRanges != nil && other.DateRanges != nil {
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for _, dr := range other.DateRanges {
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fr.DateRanges = fr.DateRanges.Add(dr)
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}
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}
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}
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func (fr *FacetResult) Fixup(size int) {
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if fr.Terms != nil {
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sort.Sort(fr.Terms)
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if len(fr.Terms) > size {
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moveToOther := fr.Terms[size:]
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for _, mto := range moveToOther {
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fr.Other += mto.Count
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}
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fr.Terms = fr.Terms[0:size]
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}
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} else if fr.NumericRanges != nil {
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sort.Sort(fr.NumericRanges)
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if len(fr.NumericRanges) > size {
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moveToOther := fr.NumericRanges[size:]
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for _, mto := range moveToOther {
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fr.Other += mto.Count
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}
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fr.NumericRanges = fr.NumericRanges[0:size]
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}
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} else if fr.DateRanges != nil {
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sort.Sort(fr.DateRanges)
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if len(fr.DateRanges) > size {
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moveToOther := fr.DateRanges[size:]
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for _, mto := range moveToOther {
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fr.Other += mto.Count
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}
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fr.DateRanges = fr.DateRanges[0:size]
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}
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}
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}
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type FacetResults map[string]*FacetResult
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func (fr FacetResults) Merge(other FacetResults) {
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for name, oFacetResult := range other {
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facetResult, ok := fr[name]
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if ok {
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facetResult.Merge(oFacetResult)
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} else {
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fr[name] = oFacetResult
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}
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}
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}
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func (fr FacetResults) Fixup(name string, size int) {
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facetResult, ok := fr[name]
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if ok {
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facetResult.Fixup(size)
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}
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}
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func (fb *FacetsBuilder) Results() FacetResults {
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fr := make(FacetResults)
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for facetName, facetBuilder := range fb.facets {
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facetResult := facetBuilder.Result()
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fr[facetName] = facetResult
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}
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return fr
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}
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