mirror of
https://github.com/JasonYANG170/IOTConnect-Web.git
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52 lines
1.5 KiB
JavaScript
52 lines
1.5 KiB
JavaScript
// LazyTransform is a special type of Transform stream that is lazily loaded.
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// This is used for performance with bi-API-ship: when two APIs are available
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// for the stream, one conventional and one non-conventional.
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'use strict'
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const { ObjectDefineProperties, ObjectDefineProperty, ObjectSetPrototypeOf } = require('../../ours/primordials')
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const stream = require('../../stream')
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const { getDefaultEncoding } = require('../crypto/util')
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module.exports = LazyTransform
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function LazyTransform(options) {
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this._options = options
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}
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ObjectSetPrototypeOf(LazyTransform.prototype, stream.Transform.prototype)
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ObjectSetPrototypeOf(LazyTransform, stream.Transform)
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function makeGetter(name) {
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return function () {
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stream.Transform.call(this, this._options)
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this._writableState.decodeStrings = false
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if (!this._options || !this._options.defaultEncoding) {
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this._writableState.defaultEncoding = getDefaultEncoding()
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}
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return this[name]
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}
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}
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function makeSetter(name) {
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return function (val) {
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ObjectDefineProperty(this, name, {
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__proto__: null,
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value: val,
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enumerable: true,
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configurable: true,
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writable: true
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})
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}
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}
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ObjectDefineProperties(LazyTransform.prototype, {
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_readableState: {
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__proto__: null,
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get: makeGetter('_readableState'),
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set: makeSetter('_readableState'),
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configurable: true,
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enumerable: true
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},
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_writableState: {
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__proto__: null,
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get: makeGetter('_writableState'),
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set: makeSetter('_writableState'),
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configurable: true,
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enumerable: true
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}
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})
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