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