func (im *IndexMapping) 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
}
AddCustomDateTimeParser defines a custom date time parser for use in this mapping
package bleve
import (
	"encoding/json"
	"fmt"
	"github.com/blevesearch/bleve/analysis"
	"github.com/blevesearch/bleve/analysis/analyzers/standard_analyzer"
	"github.com/blevesearch/bleve/analysis/datetime_parsers/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_analyzer.Name
const defaultDateTimeParser = datetime_optional.Name
type customAnalysis struct {
	CharFilters     map[string]map[string]interface{} `json:"char_filters,omitempty"`
	Tokenizers      map[string]map[string]interface{} `json:"tokenizers,omitempty"`
	TokenMaps       map[string]map[string]interface{} `json:"token_maps,omitempty"`
	TokenFilters    map[string]map[string]interface{} `json:"token_filters,omitempty"`
	Analyzers       map[string]map[string]interface{} `json:"analyzers,omitempty"`
	DateTimeParsers map[string]map[string]interface{} `json:"date_time_parsers,omitempty"`
}
func (c *customAnalysis) registerAll(i *IndexMapping) error {
	for name, config := range c.CharFilters {
		_, err := i.cache.DefineCharFilter(name, config)
		if err != nil {
			return err
		}
	}
	if len(c.Tokenizers) > 0 {
		todo := map[string]struct{}{}
		for name := range c.Tokenizers {
			todo[name] = struct{}{}
		}
		registered := 1
		errs := []error{}
		for len(todo) > 0 && registered > 0 {
			registered = 0
			errs = []error{}
			for name := range todo {
				config := c.Tokenizers[name]
				_, err := i.cache.DefineTokenizer(name, config)
				if err != nil {
					errs = append(errs, err)
				} else {
					delete(todo, name)
					registered++
				}
			}
		}
		if len(errs) > 0 {
			return errs[0]
		}
	}
	for name, config := range c.TokenMaps {
		_, err := i.cache.DefineTokenMap(name, config)
		if err != nil {
			return err
		}
	}
	for name, config := range c.TokenFilters {
		_, err := i.cache.DefineTokenFilter(name, config)
		if err != nil {
			return err
		}
	}
	for name, config := range c.Analyzers {
		_, err := i.cache.DefineAnalyzer(name, config)
		if err != nil {
			return err
		}
	}
	for name, config := range c.DateTimeParsers {
		_, err := i.cache.DefineDateTimeParser(name, config)
		if err != nil {
			return err
		}
	}
	return nil
}
func newCustomAnalysis() *customAnalysis {
	rv := customAnalysis{
		CharFilters:     make(map[string]map[string]interface{}),
		Tokenizers:      make(map[string]map[string]interface{}),
		TokenMaps:       make(map[string]map[string]interface{}),
		TokenFilters:    make(map[string]map[string]interface{}),
		Analyzers:       make(map[string]map[string]interface{}),
		DateTimeParsers: make(map[string]map[string]interface{}),
	}
	return &rv
}
type IndexMapping 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
}
func (im *IndexMapping) 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
}
func (im *IndexMapping) 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
}
func (im *IndexMapping) 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
}
func (im *IndexMapping) 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
}
func (im *IndexMapping) 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
}