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// Copyright (c) 2014 Couchbase, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package document
import (
"fmt"
"github.com/blevesearch/bleve/analysis"
)
const DefaultBooleanIndexingOptions = StoreField | IndexField
type BooleanField struct {
name string
arrayPositions []uint64
options IndexingOptions
value []byte
numPlainTextBytes uint64
}
func (b *BooleanField) Name() string {
return b.name
}
func (b *BooleanField) ArrayPositions() []uint64 {
return b.arrayPositions
}
func (b *BooleanField) Options() IndexingOptions {
return b.options
}
func (b *BooleanField) Analyze() (int, analysis.TokenFrequencies) {
tokens := make(analysis.TokenStream, 0)
tokens = append(tokens, &analysis.Token{
Start: 0,
End: len(b.value),
Term: b.value,
Position: 1,
Type: analysis.Boolean,
})
fieldLength := len(tokens)
tokenFreqs := analysis.TokenFrequency(tokens, b.arrayPositions, b.options.IncludeTermVectors())
return fieldLength, tokenFreqs
}
func (b *BooleanField) Value() []byte {
return b.value
}
func (b *BooleanField) Boolean() (bool, error) {
if len(b.value) == 1 {
return b.value[0] == 'T', nil
}
return false, fmt.Errorf("boolean field has %d bytes", len(b.value))
}
func (b *BooleanField) GoString() string {
return fmt.Sprintf("&document.BooleanField{Name:%s, Options: %s, Value: %s}", b.name, b.options, b.value)
}
func (b *BooleanField) NumPlainTextBytes() uint64 {
return b.numPlainTextBytes
}
func NewBooleanFieldFromBytes(name string, arrayPositions []uint64, value []byte) *BooleanField {
return &BooleanField{
name: name,
arrayPositions: arrayPositions,
value: value,
options: DefaultNumericIndexingOptions,
numPlainTextBytes: uint64(len(value)),
}
}
func NewBooleanField(name string, arrayPositions []uint64, b bool) *BooleanField {
return NewBooleanFieldWithIndexingOptions(name, arrayPositions, b, DefaultNumericIndexingOptions)
}
func NewBooleanFieldWithIndexingOptions(name string, arrayPositions []uint64, b bool, options IndexingOptions) *BooleanField {
numPlainTextBytes := 5
v := []byte("F")
if b {
numPlainTextBytes = 4
v = []byte("T")
}
return &BooleanField{
name: name,
arrayPositions: arrayPositions,
value: v,
options: options,
numPlainTextBytes: uint64(numPlainTextBytes),
}
}
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