mirror of
https://github.com/go-gitea/gitea
synced 2024-12-23 23:44:50 +01:00
430 lines
13 KiB
Go
430 lines
13 KiB
Go
// 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 mapping
|
|
|
|
import (
|
|
"encoding/json"
|
|
"fmt"
|
|
|
|
"github.com/blevesearch/bleve/analysis"
|
|
"github.com/blevesearch/bleve/analysis/analyzer/standard"
|
|
"github.com/blevesearch/bleve/analysis/datetime/optional"
|
|
"github.com/blevesearch/bleve/document"
|
|
"github.com/blevesearch/bleve/registry"
|
|
)
|
|
|
|
var MappingJSONStrict = false
|
|
|
|
const defaultTypeField = "_type"
|
|
const defaultType = "_default"
|
|
const defaultField = "_all"
|
|
const defaultAnalyzer = standard.Name
|
|
const defaultDateTimeParser = optional.Name
|
|
|
|
// An IndexMappingImpl controls how objects are placed
|
|
// into an index.
|
|
// First the type of the object is determined.
|
|
// Once the type is know, the appropriate
|
|
// DocumentMapping is selected by the type.
|
|
// If no mapping was determined for that type,
|
|
// a DefaultMapping will be used.
|
|
type IndexMappingImpl struct {
|
|
TypeMapping map[string]*DocumentMapping `json:"types,omitempty"`
|
|
DefaultMapping *DocumentMapping `json:"default_mapping"`
|
|
TypeField string `json:"type_field"`
|
|
DefaultType string `json:"default_type"`
|
|
DefaultAnalyzer string `json:"default_analyzer"`
|
|
DefaultDateTimeParser string `json:"default_datetime_parser"`
|
|
DefaultField string `json:"default_field"`
|
|
StoreDynamic bool `json:"store_dynamic"`
|
|
IndexDynamic bool `json:"index_dynamic"`
|
|
CustomAnalysis *customAnalysis `json:"analysis,omitempty"`
|
|
cache *registry.Cache
|
|
}
|
|
|
|
// AddCustomCharFilter defines a custom char filter for use in this mapping
|
|
func (im *IndexMappingImpl) AddCustomCharFilter(name string, config map[string]interface{}) error {
|
|
_, err := im.cache.DefineCharFilter(name, config)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
im.CustomAnalysis.CharFilters[name] = config
|
|
return nil
|
|
}
|
|
|
|
// AddCustomTokenizer defines a custom tokenizer for use in this mapping
|
|
func (im *IndexMappingImpl) AddCustomTokenizer(name string, config map[string]interface{}) error {
|
|
_, err := im.cache.DefineTokenizer(name, config)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
im.CustomAnalysis.Tokenizers[name] = config
|
|
return nil
|
|
}
|
|
|
|
// AddCustomTokenMap defines a custom token map for use in this mapping
|
|
func (im *IndexMappingImpl) AddCustomTokenMap(name string, config map[string]interface{}) error {
|
|
_, err := im.cache.DefineTokenMap(name, config)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
im.CustomAnalysis.TokenMaps[name] = config
|
|
return nil
|
|
}
|
|
|
|
// AddCustomTokenFilter defines a custom token filter for use in this mapping
|
|
func (im *IndexMappingImpl) AddCustomTokenFilter(name string, config map[string]interface{}) error {
|
|
_, err := im.cache.DefineTokenFilter(name, config)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
im.CustomAnalysis.TokenFilters[name] = config
|
|
return nil
|
|
}
|
|
|
|
// AddCustomAnalyzer defines a custom analyzer for use in this mapping. The
|
|
// config map must have a "type" string entry to resolve the analyzer
|
|
// constructor. The constructor is invoked with the remaining entries and
|
|
// returned analyzer is registered in the IndexMapping.
|
|
//
|
|
// bleve comes with predefined analyzers, like
|
|
// github.com/blevesearch/bleve/analysis/analyzers/custom_analyzer. They are
|
|
// available only if their package is imported by client code. To achieve this,
|
|
// use their metadata to fill configuration entries:
|
|
//
|
|
// import (
|
|
// "github.com/blevesearch/bleve/analysis/analyzers/custom_analyzer"
|
|
// "github.com/blevesearch/bleve/analysis/char_filters/html_char_filter"
|
|
// "github.com/blevesearch/bleve/analysis/token_filters/lower_case_filter"
|
|
// "github.com/blevesearch/bleve/analysis/tokenizers/unicode"
|
|
// )
|
|
//
|
|
// m := bleve.NewIndexMapping()
|
|
// err := m.AddCustomAnalyzer("html", map[string]interface{}{
|
|
// "type": custom_analyzer.Name,
|
|
// "char_filters": []string{
|
|
// html_char_filter.Name,
|
|
// },
|
|
// "tokenizer": unicode.Name,
|
|
// "token_filters": []string{
|
|
// lower_case_filter.Name,
|
|
// ...
|
|
// },
|
|
// })
|
|
func (im *IndexMappingImpl) AddCustomAnalyzer(name string, config map[string]interface{}) error {
|
|
_, err := im.cache.DefineAnalyzer(name, config)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
im.CustomAnalysis.Analyzers[name] = config
|
|
return nil
|
|
}
|
|
|
|
// AddCustomDateTimeParser defines a custom date time parser for use in this mapping
|
|
func (im *IndexMappingImpl) AddCustomDateTimeParser(name string, config map[string]interface{}) error {
|
|
_, err := im.cache.DefineDateTimeParser(name, config)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
im.CustomAnalysis.DateTimeParsers[name] = config
|
|
return nil
|
|
}
|
|
|
|
// NewIndexMapping creates a new IndexMapping that will use all the default indexing rules
|
|
func NewIndexMapping() *IndexMappingImpl {
|
|
return &IndexMappingImpl{
|
|
TypeMapping: make(map[string]*DocumentMapping),
|
|
DefaultMapping: NewDocumentMapping(),
|
|
TypeField: defaultTypeField,
|
|
DefaultType: defaultType,
|
|
DefaultAnalyzer: defaultAnalyzer,
|
|
DefaultDateTimeParser: defaultDateTimeParser,
|
|
DefaultField: defaultField,
|
|
IndexDynamic: IndexDynamic,
|
|
StoreDynamic: StoreDynamic,
|
|
CustomAnalysis: newCustomAnalysis(),
|
|
cache: registry.NewCache(),
|
|
}
|
|
}
|
|
|
|
// Validate will walk the entire structure ensuring the following
|
|
// explicitly named and default analyzers can be built
|
|
func (im *IndexMappingImpl) Validate() error {
|
|
_, err := im.cache.AnalyzerNamed(im.DefaultAnalyzer)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
_, err = im.cache.DateTimeParserNamed(im.DefaultDateTimeParser)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
err = im.DefaultMapping.Validate(im.cache)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
for _, docMapping := range im.TypeMapping {
|
|
err = docMapping.Validate(im.cache)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// AddDocumentMapping sets a custom document mapping for the specified type
|
|
func (im *IndexMappingImpl) AddDocumentMapping(doctype string, dm *DocumentMapping) {
|
|
im.TypeMapping[doctype] = dm
|
|
}
|
|
|
|
func (im *IndexMappingImpl) mappingForType(docType string) *DocumentMapping {
|
|
docMapping := im.TypeMapping[docType]
|
|
if docMapping == nil {
|
|
docMapping = im.DefaultMapping
|
|
}
|
|
return docMapping
|
|
}
|
|
|
|
// UnmarshalJSON offers custom unmarshaling with optional strict validation
|
|
func (im *IndexMappingImpl) UnmarshalJSON(data []byte) error {
|
|
|
|
var tmp map[string]json.RawMessage
|
|
err := json.Unmarshal(data, &tmp)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// set defaults for fields which might have been omitted
|
|
im.cache = registry.NewCache()
|
|
im.CustomAnalysis = newCustomAnalysis()
|
|
im.TypeField = defaultTypeField
|
|
im.DefaultType = defaultType
|
|
im.DefaultAnalyzer = defaultAnalyzer
|
|
im.DefaultDateTimeParser = defaultDateTimeParser
|
|
im.DefaultField = defaultField
|
|
im.DefaultMapping = NewDocumentMapping()
|
|
im.TypeMapping = make(map[string]*DocumentMapping)
|
|
im.StoreDynamic = StoreDynamic
|
|
im.IndexDynamic = IndexDynamic
|
|
|
|
var invalidKeys []string
|
|
for k, v := range tmp {
|
|
switch k {
|
|
case "analysis":
|
|
err := json.Unmarshal(v, &im.CustomAnalysis)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
case "type_field":
|
|
err := json.Unmarshal(v, &im.TypeField)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
case "default_type":
|
|
err := json.Unmarshal(v, &im.DefaultType)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
case "default_analyzer":
|
|
err := json.Unmarshal(v, &im.DefaultAnalyzer)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
case "default_datetime_parser":
|
|
err := json.Unmarshal(v, &im.DefaultDateTimeParser)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
case "default_field":
|
|
err := json.Unmarshal(v, &im.DefaultField)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
case "default_mapping":
|
|
err := json.Unmarshal(v, &im.DefaultMapping)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
case "types":
|
|
err := json.Unmarshal(v, &im.TypeMapping)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
case "store_dynamic":
|
|
err := json.Unmarshal(v, &im.StoreDynamic)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
case "index_dynamic":
|
|
err := json.Unmarshal(v, &im.IndexDynamic)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
default:
|
|
invalidKeys = append(invalidKeys, k)
|
|
}
|
|
}
|
|
|
|
if MappingJSONStrict && len(invalidKeys) > 0 {
|
|
return fmt.Errorf("index mapping contains invalid keys: %v", invalidKeys)
|
|
}
|
|
|
|
err = im.CustomAnalysis.registerAll(im)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (im *IndexMappingImpl) determineType(data interface{}) string {
|
|
// first see if the object implements Classifier
|
|
classifier, ok := data.(Classifier)
|
|
if ok {
|
|
return classifier.Type()
|
|
}
|
|
|
|
// now see if we can find a type using the mapping
|
|
typ, ok := mustString(lookupPropertyPath(data, im.TypeField))
|
|
if ok {
|
|
return typ
|
|
}
|
|
|
|
return im.DefaultType
|
|
}
|
|
|
|
func (im *IndexMappingImpl) MapDocument(doc *document.Document, data interface{}) error {
|
|
docType := im.determineType(data)
|
|
docMapping := im.mappingForType(docType)
|
|
walkContext := im.newWalkContext(doc, docMapping)
|
|
if docMapping.Enabled {
|
|
docMapping.walkDocument(data, []string{}, []uint64{}, walkContext)
|
|
|
|
// see if the _all field was disabled
|
|
allMapping := docMapping.documentMappingForPath("_all")
|
|
if allMapping == nil || (allMapping.Enabled != false) {
|
|
field := document.NewCompositeFieldWithIndexingOptions("_all", true, []string{}, walkContext.excludedFromAll, document.IndexField|document.IncludeTermVectors)
|
|
doc.AddField(field)
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
type walkContext struct {
|
|
doc *document.Document
|
|
im *IndexMappingImpl
|
|
dm *DocumentMapping
|
|
excludedFromAll []string
|
|
}
|
|
|
|
func (im *IndexMappingImpl) newWalkContext(doc *document.Document, dm *DocumentMapping) *walkContext {
|
|
return &walkContext{
|
|
doc: doc,
|
|
im: im,
|
|
dm: dm,
|
|
excludedFromAll: []string{},
|
|
}
|
|
}
|
|
|
|
// AnalyzerNameForPath attempts to find the best analyzer to use with only a
|
|
// field name will walk all the document types, look for field mappings at the
|
|
// provided path, if one exists and it has an explicit analyzer that is
|
|
// returned.
|
|
func (im *IndexMappingImpl) AnalyzerNameForPath(path string) string {
|
|
// first we look for explicit mapping on the field
|
|
for _, docMapping := range im.TypeMapping {
|
|
analyzerName := docMapping.analyzerNameForPath(path)
|
|
if analyzerName != "" {
|
|
return analyzerName
|
|
}
|
|
}
|
|
// now try the default mapping
|
|
pathMapping := im.DefaultMapping.documentMappingForPath(path)
|
|
if pathMapping != nil {
|
|
if len(pathMapping.Fields) > 0 {
|
|
if pathMapping.Fields[0].Analyzer != "" {
|
|
return pathMapping.Fields[0].Analyzer
|
|
}
|
|
}
|
|
}
|
|
|
|
// next we will try default analyzers for the path
|
|
pathDecoded := decodePath(path)
|
|
for _, docMapping := range im.TypeMapping {
|
|
rv := docMapping.defaultAnalyzerName(pathDecoded)
|
|
if rv != "" {
|
|
return rv
|
|
}
|
|
}
|
|
|
|
return im.DefaultAnalyzer
|
|
}
|
|
|
|
func (im *IndexMappingImpl) AnalyzerNamed(name string) *analysis.Analyzer {
|
|
analyzer, err := im.cache.AnalyzerNamed(name)
|
|
if err != nil {
|
|
logger.Printf("error using analyzer named: %s", name)
|
|
return nil
|
|
}
|
|
return analyzer
|
|
}
|
|
|
|
func (im *IndexMappingImpl) DateTimeParserNamed(name string) analysis.DateTimeParser {
|
|
if name == "" {
|
|
name = im.DefaultDateTimeParser
|
|
}
|
|
dateTimeParser, err := im.cache.DateTimeParserNamed(name)
|
|
if err != nil {
|
|
logger.Printf("error using datetime parser named: %s", name)
|
|
return nil
|
|
}
|
|
return dateTimeParser
|
|
}
|
|
|
|
func (im *IndexMappingImpl) datetimeParserNameForPath(path string) string {
|
|
|
|
// first we look for explicit mapping on the field
|
|
for _, docMapping := range im.TypeMapping {
|
|
pathMapping := docMapping.documentMappingForPath(path)
|
|
if pathMapping != nil {
|
|
if len(pathMapping.Fields) > 0 {
|
|
if pathMapping.Fields[0].Analyzer != "" {
|
|
return pathMapping.Fields[0].Analyzer
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return im.DefaultDateTimeParser
|
|
}
|
|
|
|
func (im *IndexMappingImpl) AnalyzeText(analyzerName string, text []byte) (analysis.TokenStream, error) {
|
|
analyzer, err := im.cache.AnalyzerNamed(analyzerName)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return analyzer.Analyze(text), nil
|
|
}
|
|
|
|
// FieldAnalyzer returns the name of the analyzer used on a field.
|
|
func (im *IndexMappingImpl) FieldAnalyzer(field string) string {
|
|
return im.AnalyzerNameForPath(field)
|
|
}
|
|
|
|
// wrapper to satisfy new interface
|
|
|
|
func (im *IndexMappingImpl) DefaultSearchField() string {
|
|
return im.DefaultField
|
|
}
|