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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| // Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one | ||
| // or more contributor license agreements. Licensed under the Elastic License; | ||
| // you may not use this file except in compliance with the Elastic License. | ||
|
|
||
| package azureblobstorage | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "io" | ||
| ) | ||
|
|
||
| // decoder is an interface for decoding data from an io.Reader. | ||
| type decoder interface { | ||
| // decode reads and decodes data from an io reader based on the codec type. | ||
| // It returns the decoded data and an error if the data cannot be decoded. | ||
| decode() ([]byte, error) | ||
| // next advances the decoder to the next data item and returns true if there is more data to be decoded. | ||
| next() bool | ||
| // close closes the decoder and releases any resources associated with it. | ||
| // It returns an error if the decoder cannot be closed. | ||
|
|
||
| // more returns whether there are more records to read. | ||
| more() bool | ||
|
|
||
| close() error | ||
| } | ||
|
|
||
| // valueDecoder is a decoder that can decode directly to a JSON serialisable value. | ||
| type valueDecoder interface { | ||
| decoder | ||
|
|
||
| decodeValue() ([]byte, map[string]any, error) | ||
| } | ||
|
|
||
| // newDecoder creates a new decoder based on the codec type. | ||
| // It returns a decoder type and an error if the codec type is not supported. | ||
| // If the reader config codec option is not set, it returns a nil decoder and nil error. | ||
| func newDecoder(cfg decoderConfig, r io.Reader) (decoder, error) { | ||
| switch { | ||
| case cfg.Codec == nil: | ||
| return nil, nil | ||
| case cfg.Codec.CSV != nil: | ||
| return newCSVDecoder(cfg, r) | ||
| default: | ||
| return nil, fmt.Errorf("unsupported config value: %v", cfg) | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| // Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one | ||
| // or more contributor license agreements. Licensed under the Elastic License; | ||
| // you may not use this file except in compliance with the Elastic License. | ||
|
|
||
| package azureblobstorage | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "unicode/utf8" | ||
| ) | ||
|
|
||
| // decoderConfig contains the configuration options for instantiating a decoder. | ||
| type decoderConfig struct { | ||
| Codec *codecConfig `config:"codec"` | ||
| } | ||
|
|
||
| // codecConfig contains the configuration options for different codecs used by a decoder. | ||
| type codecConfig struct { | ||
| CSV *csvCodecConfig `config:"csv"` | ||
| } | ||
|
|
||
| // csvCodecConfig contains the configuration options for the CSV codec. | ||
| type csvCodecConfig struct { | ||
| Enabled bool `config:"enabled"` | ||
|
|
||
| // Fields is the set of field names. If it is present | ||
| // it is used to specify the object names of returned | ||
| // values and the FieldsPerRecord field in the csv.Reader. | ||
| // Otherwise, names are obtained from the first | ||
| // line of the CSV data. | ||
| Fields []string `config:"fields_names"` | ||
|
|
||
| // The fields below have the same meaning as the | ||
| // fields of the same name in csv.Reader. | ||
| Comma *configRune `config:"comma"` | ||
| Comment configRune `config:"comment"` | ||
| LazyQuotes bool `config:"lazy_quotes"` | ||
| TrimLeadingSpace bool `config:"trim_leading_space"` | ||
| } | ||
|
|
||
| type configRune rune | ||
|
|
||
| func (r *configRune) Unpack(s string) error { | ||
| if s == "" { | ||
| return nil | ||
| } | ||
| n := utf8.RuneCountInString(s) | ||
| if n != 1 { | ||
| return fmt.Errorf("single character option given more than one character: %q", s) | ||
| } | ||
| _r, _ := utf8.DecodeRuneInString(s) | ||
| *r = configRune(_r) | ||
| return nil | ||
| } |
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