--- /dev/null
+"use strict";
+
+var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
+
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+
+var SlotIndexer = function () {
+ function SlotIndexer(_updates, _buffer) {
+ _classCallCheck(this, SlotIndexer);
+
+ // updates is an array of slot objects
+ // buffer is an instanceof slotbuffer constructor object in slotbuffer.js
+ this.updates = _updates;
+ if (_buffer && _buffer instanceof SlotBuffer) {
+ this.buffer = _buffer;
+ } else {
+ throw new Error("Argument error Buffer should be an instance of SlotBuffer");
+ }
+ this.firstslotseqnum = this.updates[0].getSequenceNumber();
+ }
+
+ _createClass(SlotIndexer, [{
+ key: "getSlot",
+ value: function getSlot(seqnum) {
+ if (seqnum >= this.firstslotseqnum) {
+ var offset = seqnum - this.firstslotseqnum;
+ if (offset >= this.updates.length) {
+ throw new Error('Invalid Slot Sequence Number Reference');
+ } else {
+ return this.updates[offset];
+ }
+ } else {
+ return this.buffer.getSlot(seqnum);
+ }
+ }
+ }]);
+
+ return SlotIndexer;
+}();
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