Current File : //home/tradevaly/www/node_modules/restructure/src/LazyArray.js

// Generated by CoffeeScript 1.7.1
(function() {
  var ArrayT, LazyArray, LazyArrayT, NumberT, inspect, utils,
    __hasProp = {}.hasOwnProperty,
    __extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; };

  ArrayT = require('./Array');

  NumberT = require('./Number').Number;

  utils = require('./utils');

  inspect = require('util').inspect;

  LazyArrayT = (function(_super) {
    __extends(LazyArrayT, _super);

    function LazyArrayT() {
      return LazyArrayT.__super__.constructor.apply(this, arguments);
    }

    LazyArrayT.prototype.decode = function(stream, parent) {
      var length, pos, res;
      pos = stream.pos;
      length = utils.resolveLength(this.length, stream, parent);
      if (this.length instanceof NumberT) {
        parent = {
          parent: parent,
          _startOffset: pos,
          _currentOffset: 0,
          _length: length
        };
      }
      res = new LazyArray(this.type, length, stream, parent);
      stream.pos += length * this.type.size(null, parent);
      return res;
    };

    LazyArrayT.prototype.size = function(val, ctx) {
      if (val instanceof LazyArray) {
        val = val.toArray();
      }
      return LazyArrayT.__super__.size.call(this, val, ctx);
    };

    LazyArrayT.prototype.encode = function(stream, val, ctx) {
      if (val instanceof LazyArray) {
        val = val.toArray();
      }
      return LazyArrayT.__super__.encode.call(this, stream, val, ctx);
    };

    return LazyArrayT;

  })(ArrayT);

  LazyArray = (function() {
    function LazyArray(type, length, stream, ctx) {
      this.type = type;
      this.length = length;
      this.stream = stream;
      this.ctx = ctx;
      this.base = this.stream.pos;
      this.items = [];
    }

    LazyArray.prototype.get = function(index) {
      var pos;
      if (index < 0 || index >= this.length) {
        return void 0;
      }
      if (this.items[index] == null) {
        pos = this.stream.pos;
        this.stream.pos = this.base + this.type.size(null, this.ctx) * index;
        this.items[index] = this.type.decode(this.stream, this.ctx);
        this.stream.pos = pos;
      }
      return this.items[index];
    };

    LazyArray.prototype.toArray = function() {
      var i, _i, _ref, _results;
      _results = [];
      for (i = _i = 0, _ref = this.length; _i < _ref; i = _i += 1) {
        _results.push(this.get(i));
      }
      return _results;
    };

    LazyArray.prototype.inspect = function() {
      return inspect(this.toArray());
    };

    return LazyArray;

  })();

  module.exports = LazyArrayT;

}).call(this);