99 lines
2.8 KiB
Go
99 lines
2.8 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 document
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import (
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"github.com/blevesearch/bleve/analysis"
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)
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const DefaultCompositeIndexingOptions = IndexField
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type CompositeField struct {
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name string
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includedFields map[string]bool
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excludedFields map[string]bool
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defaultInclude bool
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options IndexingOptions
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totalLength int
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compositeFrequencies analysis.TokenFrequencies
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}
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func NewCompositeField(name string, defaultInclude bool, include []string, exclude []string) *CompositeField {
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return NewCompositeFieldWithIndexingOptions(name, defaultInclude, include, exclude, DefaultCompositeIndexingOptions)
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}
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func NewCompositeFieldWithIndexingOptions(name string, defaultInclude bool, include []string, exclude []string, options IndexingOptions) *CompositeField {
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rv := &CompositeField{
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name: name,
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options: options,
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defaultInclude: defaultInclude,
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includedFields: make(map[string]bool, len(include)),
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excludedFields: make(map[string]bool, len(exclude)),
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compositeFrequencies: make(analysis.TokenFrequencies),
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}
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for _, i := range include {
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rv.includedFields[i] = true
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}
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for _, e := range exclude {
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rv.excludedFields[e] = true
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}
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return rv
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}
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func (c *CompositeField) Name() string {
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return c.name
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}
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func (c *CompositeField) ArrayPositions() []uint64 {
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return []uint64{}
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}
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func (c *CompositeField) Options() IndexingOptions {
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return c.options
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}
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func (c *CompositeField) Analyze() (int, analysis.TokenFrequencies) {
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return c.totalLength, c.compositeFrequencies
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}
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func (c *CompositeField) Value() []byte {
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return []byte{}
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}
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func (c *CompositeField) NumPlainTextBytes() uint64 {
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return 0
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}
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func (c *CompositeField) includesField(field string) bool {
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shouldInclude := c.defaultInclude
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_, fieldShouldBeIncluded := c.includedFields[field]
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if fieldShouldBeIncluded {
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shouldInclude = true
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}
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_, fieldShouldBeExcluded := c.excludedFields[field]
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if fieldShouldBeExcluded {
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shouldInclude = false
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}
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return shouldInclude
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}
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func (c *CompositeField) Compose(field string, length int, freq analysis.TokenFrequencies) {
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if c.includesField(field) {
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c.totalLength += length
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c.compositeFrequencies.MergeAll(field, freq)
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}
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}
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