108 lines
2.9 KiB
Go
108 lines
2.9 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 document
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import (
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"fmt"
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"github.com/blevesearch/bleve/analysis"
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)
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const DefaultBooleanIndexingOptions = StoreField | IndexField | DocValues
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type BooleanField struct {
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name string
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arrayPositions []uint64
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options IndexingOptions
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value []byte
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numPlainTextBytes uint64
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}
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func (b *BooleanField) Name() string {
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return b.name
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}
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func (b *BooleanField) ArrayPositions() []uint64 {
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return b.arrayPositions
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}
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func (b *BooleanField) Options() IndexingOptions {
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return b.options
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}
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func (b *BooleanField) Analyze() (int, analysis.TokenFrequencies) {
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tokens := make(analysis.TokenStream, 0)
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tokens = append(tokens, &analysis.Token{
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Start: 0,
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End: len(b.value),
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Term: b.value,
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Position: 1,
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Type: analysis.Boolean,
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})
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fieldLength := len(tokens)
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tokenFreqs := analysis.TokenFrequency(tokens, b.arrayPositions, b.options.IncludeTermVectors())
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return fieldLength, tokenFreqs
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}
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func (b *BooleanField) Value() []byte {
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return b.value
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}
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func (b *BooleanField) Boolean() (bool, error) {
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if len(b.value) == 1 {
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return b.value[0] == 'T', nil
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}
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return false, fmt.Errorf("boolean field has %d bytes", len(b.value))
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}
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func (b *BooleanField) GoString() string {
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return fmt.Sprintf("&document.BooleanField{Name:%s, Options: %s, Value: %s}", b.name, b.options, b.value)
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}
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func (b *BooleanField) NumPlainTextBytes() uint64 {
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return b.numPlainTextBytes
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}
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func NewBooleanFieldFromBytes(name string, arrayPositions []uint64, value []byte) *BooleanField {
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return &BooleanField{
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name: name,
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arrayPositions: arrayPositions,
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value: value,
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options: DefaultNumericIndexingOptions,
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numPlainTextBytes: uint64(len(value)),
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}
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}
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func NewBooleanField(name string, arrayPositions []uint64, b bool) *BooleanField {
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return NewBooleanFieldWithIndexingOptions(name, arrayPositions, b, DefaultNumericIndexingOptions)
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}
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func NewBooleanFieldWithIndexingOptions(name string, arrayPositions []uint64, b bool, options IndexingOptions) *BooleanField {
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numPlainTextBytes := 5
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v := []byte("F")
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if b {
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numPlainTextBytes = 4
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v = []byte("T")
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}
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return &BooleanField{
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name: name,
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arrayPositions: arrayPositions,
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value: v,
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options: options,
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numPlainTextBytes: uint64(numPlainTextBytes),
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}
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}
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