flatbuffers-addon
v1.0.4
Published
Node flatbuffers addon
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flatbuffers-addon
Generate flatbuffers directly from node.
Generate binary
const flatc = require("flatbuffers-addon");
const buffer = flatc.binary(options);options.schema
type: String|Buffer
if schema is a String and schema_contents is null or undefined, schema will be treated as schema_contents.
otherwise, it will be treated as the schema file path.
options.schema_contents
type: String|Buffer
The schema contents.
If the schema_contents is a schema binary, the schema file path must end with .bfbs.
options.schema_binary
type: bool
default: false
Serialize schemas instead of JSON
options.json
type: String|Buffer|Object
if json is a String and json_contents is null or undefined, json will be treated as json_contents.
if json is a Buffer or an Object, json will be treated as json_contents.
otherwise json must be a String and will be treated as the path to the JSON.
options.json_contents
type: String|Buffer|Object
The JSON to serialize
options.include_directories
type: [String]
Include directories for schemas
options.conform
type: String|Buffer
Specify a schema the following schema should be an evolution of.
if conform is a String and conform_contents is null or undefined, conform will be treated as conform_contents.
options.conform_contents
type: String|Buffer
Conform schema contents.
options.conform_include_directories
type: [String]
Include directories for conform schemas
options.strict_json
NOT TESTED
type: bool
default: false
field names must be / will be quoted, no trailing commas in tables/vectors.
options.ignore_null_scalar
type: bool
default: false
Allow scalar fields to be null
options.allow_non_utf8
NOT TESTED
type: bool
default: false
Pass non-UTF-8 input through parser
options.skip_unexpected_fields_in_json
type: bool
default: false
Allow fields in JSON that are not defined in the schema. These fields will be discared when generating binaries.
options.size_prefixed
NOT TESTED
type: bool
default: false
Input binaries are size prefixed buffers.
options.proto_mode
NOT TESTED
type: bool
default: false
Input is a .proto, translate to .fbs.
options.proto_oneof_union
NOT TESTED
type: bool
default: false
Translate .proto oneofs to flatbuffer unions.
options.binary_schema_comments
NOT TESTED
type: bool
default: false
Add doc comments to the binary schema files.
options.binary_schema_builtins
NOT TESTED
type: bool
default: false
Add builtin attributes to the binary schema files.
options.force_defaults
type: bool
default: false
If false, don't serialize values equal to the default, therefore reducing size of the binary output.
Generate js
const flatc = require("flatbuffers-addon");
const code = flatc.js(options);options.schema
type: String|Buffer
if schema is a String and schema_contents is null or undefined, schema will be treated as schema_contents.
otherwise, it will be treated as the schema file path.
options.schema_contents
type: String|Buffer
The schema contents.
If the schema_contents is a schema binary, the schema file path must end with .bfbs.
options.include_directories
type: [String]
Include directories for schemas
options.conform
type: String|Buffer
Specify a schema the following schema should be an evolution of.
if conform is a String and conform_contents is null or undefined, conform will be treated as conform_contents.
options.conform_contents
type: String|Buffer
Conform schema contents.
options.conform_include_directories
type: [String]
Include directories for conform schemas
options.type
NOT TESTED
type: String
ts to generate TypeScript code.
options.allow_non_utf8
NOT TESTED
type: bool
default: false
Pass non-UTF-8 input through parser
options.mutable_buffer
type: bool
default: false
Generate accessors that can mutate buffers in-place.
options.generate_all
NOT TESTED
type: bool
default: false
Generate not just code for the current schema files, but for all files it includes as well. If the language uses a single file for output (by default the case for C++ and JS), all code will end up in this one file.
options.skip_js_exports
type: bool
default: false
Removes Node.js style export lines in JS.
options.use_goog_js_export_format
NOT TESTED
type: bool
default: false
Uses goog.exports* for closure compiler exporting in JS.
options.use_ES6_js_export_format
NOT TESTED
type: bool
default: false
Uses ECMAScript 6 export style lines in JS.
options.keep_include_path
NOT TESTED
type: bool
default: false
Keep original prefix of schema include statement.
options.skip_flatbuffers_import
NOT TESTED
type: bool
default: false
Don't include flatbuffers import statement for TypeScript.
options.reexport_ts_modules
NOT TESTED
type: bool
default: true
re-export imported dependencies for TypeScript
options.js_ts_short_names
NOT TESTED
type: bool
default: true
Use short function names for JS and TypeScript.
Examples
const { flatbuffers } = require("flatbuffers");
const flatc = require("flatbuffers-addon");
const schema = `
namespace some.nested.namespace;
file_extension "dat";
table Book {
id:string (id: 0);
title:string (id: 1);
authors:[string] (id: 2);
release:ulong (id: 3);
genres: [ulong] (id: 4);
}
table Library {
name:string (id: 0);
books: [Book] (id: 1);
}
root_type Library;
`;
const js = flatc.js({
schema
});
const library = {
name: "BookShop 0",
books: [{
id: "book-0",
title: "Book 0",
authors: ["Author 0"]
}]
};
const buffer = flatc.binary({
schema,
json: library
});
const deserialized = ((code, binary) => {
// Evalute generated js code
const sandbox = {};
(new Function(code)).call(sandbox);
// @see https://google.github.io/flatbuffers/flatbuffers_guide_use_javascript.html
const bytes = new Uint8Array(binary);
const buf = new flatbuffers.ByteBuffer(bytes);
// Deserialized flatbuffers binary data
const Library = sandbox.some.nested.namespace.Library;
return Library.getRootAsLibrary(buf);
})(js, buffer);
console.log(deserialized.name() === "BookShop 0");
console.log(deserialized.books(0).title() === "Book 0");