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// 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,
} = primordials;
const stream = require('stream');
const {
getDefaultEncoding
} = require('internal/crypto/util');
module.exports = LazyTransform;
function LazyTransform(options) {
this._options = options;
this.writable = true;
this.readable = true;
}
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, {
value: val,
enumerable: true,
configurable: true,
writable: true
});
};
}
ObjectDefineProperties(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
}
});
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