lwm2m/lib/server/decodestream.js

Library for developing servers and client of OMA Lightweight M2M

/*
 * Copyright 2017 Alexandre Moreno <alex_moreno@tutk.com>
 *
 * This file is part of node-lwm2m
 *
 * node-lwm2m is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 *
 * node-lwm2m is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public
 * License along with node-lwm2m.
 * If not, seehttp://www.gnu.org/licenses/.
 *
 * For those usages not covered by the GNU Affero General Public License
 * please contact with::[contacto@tid.es]
 */

'use strict';

var utils = require('../utils');
var Transform = require('readable-stream').Transform;  

function DecodeStream(contentType, schema) {  
  this.contentType = contentType;
  this.schema = schema;
  Transform.call(this, { readableObjectMode: true });
}

DecodeStream.prototype = Object.create(Transform.prototype);
DecodeStream.prototype.constructor = DecodeStream;

DecodeStream.prototype._transform = function(chunk, encoding, callback) {  
  var data = utils.parsePayload(chunk, this.contentType, this.schema);
  this.push(data);
  callback();
};

DecodeStream.prototype.close = function() {  
  this.push(null);
  this.emit('close');
};

module.exports = DecodeStream;