func AnalyzerConstructor(config map[string]interface{}, cache *registry.Cache) (*analysis.Analyzer, error) {
var err error
var charFilters []analysis.CharFilter
charFiltersNames, ok := config["char_filters"].([]string)
if ok {
charFilters, err = getCharFilters(charFiltersNames, cache)
if err != nil {
return nil, err
}
} else {
charFiltersNamesInterfaceSlice, ok := config["char_filters"].([]interface{})
if ok {
charFiltersNames, err := convertInterfaceSliceToStringSlice(charFiltersNamesInterfaceSlice, "char filter")
if err != nil {
return nil, err
}
charFilters, err = getCharFilters(charFiltersNames, cache)
if err != nil {
return nil, err
}
}
}
tokenizerName, ok := config["tokenizer"].(string)
if !ok {
return nil, fmt.Errorf("must specify tokenizer")
}
tokenizer, err := cache.TokenizerNamed(tokenizerName)
if err != nil {
return nil, err
}
var tokenFilters []analysis.TokenFilter
tokenFiltersNames, ok := config["token_filters"].([]string)
if ok {
tokenFilters, err = getTokenFilters(tokenFiltersNames, cache)
if err != nil {
return nil, err
}
} else {
tokenFiltersNamesInterfaceSlice, ok := config["token_filters"].([]interface{})
if ok {
tokenFiltersNames, err := convertInterfaceSliceToStringSlice(tokenFiltersNamesInterfaceSlice, "token filter")
if err != nil {
return nil, err
}
tokenFilters, err = getTokenFilters(tokenFiltersNames, cache)
if err != nil {
return nil, err
}
}
}
rv := analysis.Analyzer{
Tokenizer: tokenizer,
}
if charFilters != nil {
rv.CharFilters = charFilters
}
if tokenFilters != nil {
rv.TokenFilters = tokenFilters
}
return &rv, nil
}
