You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 

62 lines
1.5 KiB

// 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 stream = require('stream');
const util = require('util');
const crypto = require('crypto');
module.exports = LazyTransform;
function LazyTransform(options) {
this._options = options;
this.writable = true;
this.readable = true;
}
util.inherits(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 = crypto.DEFAULT_ENCODING;
}
return this[name];
};
}
function makeSetter(name) {
return function(val) {
Object.defineProperty(this, name, {
value: val,
enumerable: true,
configurable: true,
writable: true
});
};
}
Object.defineProperties(LazyTransform.prototype, {
_readableState: {
get: makeGetter('_readableState'),
set: makeSetter('_readableState'),
configurable: true,
enumerable: true
},
_writableState: {
get: makeGetter('_writableState'),
set: makeSetter('_writableState'),
configurable: true,
enumerable: true
},
_transformState: {
get: makeGetter('_transformState'),
set: makeSetter('_transformState'),
configurable: true,
enumerable: true
}
});