X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=version1%2Fsrc%2Fjs%2Fiotjs%2Fsrc%2Fslotindexer.js;fp=version1%2Fsrc%2Fjs%2Fiotjs%2Fsrc%2Fslotindexer.js;h=66f4b4d66d0ec9a5e098e3a166df371d96a22caa;hb=7ee0658d03ecf06c490aa12422ed330cc4d43058;hp=0000000000000000000000000000000000000000;hpb=63136ef92e46eb1ddc1b4fa945661fa20b9473fe;p=iotcloud.git

diff --git a/version1/src/js/iotjs/src/slotindexer.js b/version1/src/js/iotjs/src/slotindexer.js
new file mode 100644
index 0000000..66f4b4d
--- /dev/null
+++ b/version1/src/js/iotjs/src/slotindexer.js
@@ -0,0 +1,39 @@
+"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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