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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -59,7 +59,8 @@ | |
| "From Braille", | ||
| "Parse TLV", | ||
| "CSV to JSON", | ||
| "JSON to CSV" | ||
| "JSON to CSV", | ||
| "Avro to JSON" | ||
| ] | ||
| }, | ||
| { | ||
|
|
||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| /** | ||
| * @author jarrodconnolly [jarrod@nestedquotes.ca] | ||
| * @copyright Crown Copyright 2019 | ||
| * @license Apache-2.0 | ||
| */ | ||
|
|
||
| import Operation from "../Operation.mjs"; | ||
| import OperationError from "../errors/OperationError.mjs"; | ||
| import avro from "avsc"; | ||
|
|
||
| /** | ||
| * Avro to JSON operation | ||
| */ | ||
| class AvroToJSON extends Operation { | ||
|
|
||
| /** | ||
| * AvroToJSON constructor | ||
| */ | ||
| constructor() { | ||
| super(); | ||
|
|
||
| this.name = "Avro to JSON"; | ||
| this.module = "Serialise"; | ||
| this.description = "Converts Avro encoded data into JSON."; | ||
| this.infoURL = "https://wikipedia.org/wiki/Apache_Avro"; | ||
| this.inputType = "ArrayBuffer"; | ||
| this.outputType = "string"; | ||
| this.args = [ | ||
| { | ||
| name: "Force Valid JSON", | ||
| type: "boolean", | ||
| value: true | ||
| } | ||
| ]; | ||
| } | ||
|
|
||
| /** | ||
| * @param {ArrayBuffer} input | ||
| * @param {Object[]} args | ||
| * @returns {string} | ||
| */ | ||
| run(input, args) { | ||
| if (input.byteLength <= 0) { | ||
| throw new OperationError("Please provide an input."); | ||
| } | ||
|
|
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| const forceJSON = args[0]; | ||
|
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| return new Promise((resolve, reject) => { | ||
| const result = []; | ||
| const inpArray = new Uint8Array(input); | ||
| const decoder = new avro.streams.BlockDecoder(); | ||
|
|
||
| decoder | ||
| .on("data", function (obj) { | ||
| result.push(obj); | ||
| }) | ||
| .on("error", function () { | ||
| reject(new OperationError("Error parsing Avro file.")); | ||
| }) | ||
| .on("end", function () { | ||
| if (forceJSON) { | ||
| resolve(result.length === 1 ? JSON.stringify(result[0], null, 4) : JSON.stringify(result, null, 4)); | ||
| } else { | ||
| const data = result.reduce((result, current) => result + JSON.stringify(current) + "\n", ""); | ||
| resolve(data); | ||
| } | ||
| }); | ||
|
|
||
| decoder.write(inpArray); | ||
| decoder.end(); | ||
| }); | ||
| } | ||
| } | ||
|
|
||
| export default AvroToJSON; |
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