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externals/JAXL/core/jaxl_fsm.php
- This file was added.
<?php | |||||
/** | |||||
* Jaxl (Jabber XMPP Library) | |||||
* | |||||
* Copyright (c) 2009-2012, Abhinav Singh <me@abhinavsingh.com>. | |||||
* All rights reserved. | |||||
* | |||||
* Redistribution and use in source and binary forms, with or without | |||||
* modification, are permitted provided that the following conditions | |||||
* are met: | |||||
* | |||||
* * Redistributions of source code must retain the above copyright | |||||
* notice, this list of conditions and the following disclaimer. | |||||
* | |||||
* * Redistributions in binary form must reproduce the above copyright | |||||
* notice, this list of conditions and the following disclaimer in | |||||
* the documentation and/or other materials provided with the | |||||
* distribution. | |||||
* | |||||
* * Neither the name of Abhinav Singh nor the names of his | |||||
* contributors may be used to endorse or promote products derived | |||||
* from this software without specific prior written permission. | |||||
* | |||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |||||
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |||||
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRIC | |||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN | |||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |||||
* POSSIBILITY OF SUCH DAMAGE. | |||||
* | |||||
*/ | |||||
abstract class JAXLFsm { | |||||
protected $state = null; | |||||
// abstract method | |||||
abstract public function handle_invalid_state($r); | |||||
public function __construct($state) { | |||||
$this->state = $state; | |||||
} | |||||
// returned value from state callbacks can be: | |||||
// 1) array() <-- is_callable method | |||||
// 2) array([0]=>'new_state', [1]=>'return value for current callback') <-- is_not_callable method | |||||
// 3) array([0]=>'new_state') | |||||
// 4) 'new_state' | |||||
// | |||||
// for case 1) new state will be an array | |||||
// for other cases new state will be a string | |||||
public function __call($event, $args) { | |||||
if($this->state) { | |||||
// call state method | |||||
_debug("calling state handler '".(is_array($this->state) ? $this->state[1] : $this->state)."' for incoming event '".$event."'"); | |||||
$call = is_callable($this->state) ? $this->state : (method_exists($this, $this->state) ? array(&$this, $this->state): $this->state); | |||||
$r = call_user_func($call, $event, $args); | |||||
// 4 cases of possible return value | |||||
if(is_callable($r)) $this->state = $r; | |||||
else if(is_array($r) && sizeof($r) == 2) list($this->state, $ret) = $r; | |||||
else if(is_array($r) && sizeof($r) == 1) $this->state = $r[0]; | |||||
else if(is_string($r)) $this->state = $r; | |||||
else $this->handle_invalid_state($r); | |||||
_debug("current state '".(is_array($this->state) ? $this->state[1] : $this->state)."'"); | |||||
// return case | |||||
if(!is_callable($r) && is_array($r) && sizeof($r) == 2) | |||||
return $ret; | |||||
} | |||||
else { | |||||
_debug("invalid state found, nothing called for event ".$event.""); | |||||
} | |||||
} | |||||
} | |||||
?> |