Add flag for cachedKeyDecoder usage (#85)

* Add flag for cachedKeyDecoder usage * Update api
msgpack · Aug 30, 2019 · d4ebde1 · d4ebde1
1 parent 695f3b4
commit d4ebde1
Showing 1 changed file with 2 additions and 4 deletions.
diff --git a/src/Decoder.ts b/src/Decoder.ts
@@ -70,16 +70,14 @@ export class Decoder {
   headByte = HEAD_BYTE_REQUIRED;
   readonly stack: Array<StackState> = [];
 
-  // TODO: parameterize this property.
-  readonly cachedKeyDecoder = sharedCachedKeyDecoder;
-
   constructor(
     readonly extensionCodec = ExtensionCodec.defaultCodec,
     readonly maxStrLength = DEFAULT_MAX_LENGTH,
     readonly maxBinLength = DEFAULT_MAX_LENGTH,
     readonly maxArrayLength = DEFAULT_MAX_LENGTH,
     readonly maxMapLength = DEFAULT_MAX_LENGTH,
     readonly maxExtLength = DEFAULT_MAX_LENGTH,
+    readonly cachedKeyDecoder: CachedKeyDecoder | null = sharedCachedKeyDecoder,
   ) {}
 
   setBuffer(buffer: ArrayLike<number> | ArrayBuffer): void {
@@ -479,7 +477,7 @@ export class Decoder {
 
     const offset = this.pos + headerOffset;
     let object: string;
-    if (this.stateIsMapKey() && this.cachedKeyDecoder.canBeCached(byteLength)) {
+    if (this.cachedKeyDecoder && this.stateIsMapKey() && this.cachedKeyDecoder.canBeCached(byteLength)) {
       object = this.cachedKeyDecoder.decode(this.bytes, offset, byteLength);
     } else if (TEXT_ENCODING_AVAILABLE && byteLength > TEXT_DECODER_THRESHOLD) {
       object = utf8DecodeTD(this.bytes, offset, byteLength);