src/js/iotjs/orig/slotindexer.js

   1 class SlotIndexer{
   2         constructor(_updates,_buffer){
   3                 // updates is an array of slot objects
   4                 // buffer is an instanceof slotbuffer constructor object in slotbuffer.js
   5                 this.updates = _updates;
   6                 if(_buffer && _buffer instanceof SlotBuffer){
   7                         this.buffer = _buffer;
   8                 }else{
   9                         throw new Error("Argument error Buffer should be an instance of SlotBuffer");
  10                 }
  11                 this.firstslotseqnum = this.updates[0].getSequenceNumber();
  12         }
  13
  14         getSlot(seqnum){
  15                 if(seqnum >= this.firstslotseqnum){
  16                         var offset = seqnum - this.firstslotseqnum;
  17                         if(offset >= this.updates.length){
  18                                 throw new Error('Invalid Slot Sequence Number Reference');
  19                         }else{
  20                                 return this.updates[offset];
  21                         }
  22                 }else{
  23                         return this.buffer.getSlot(seqnum);
  24                 }
  25         }
  26
  27 }