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serialize class
by: Brad LaFountain
|
March 29, 2001
Version: 1.0.0
Type: Class
Category: Other
License: GNU General Public License
Description: This class will serialize any inherited class to an xml doc to be deserialized for a later use
<?php
/***********************************************************
Serializeable class
Written By: Brad LaFountain (rodif_bl@yahoo.com)
Simply extend this class from your base class
and any inherited classes will be able to be
serialized for use to write to file, to db, to cookie
Assumptions:
The class constructor for the inherited class
must take no parameters or must have default
values for all of the parameters.
Examples:
class item extends serializeable
{
var $_quanity;
var $_item_ref;
function item($item_ref = 0,$quanity = 0)
{
$this->_item_ref = $item_ref;
$this->_quanity = $quanity;
}
function get_quanity()
{
return $this->_quanity;
}
function add_quanity($quanity)
{
$this->_quanity += $quanity;
}
}
$item = new item(12345,"2");
$data = $item->serialize();
// do what ever you want with $data here
// for this example i'll just reuse it
$item2 = new item();
$item2->deserialize($data);
$item2->add_quanity(1);
echo $item2->get_quanity();
***********************************************************/
class serializeable
{
function serialize()
{
$xmldoc = new_xmldoc("1.0");
$root = $xmldoc->add_root(get_class($this));
$this->_serialize_object($root,null,$this);
return $xmldoc->dumpmem();
}
function deserialize($data)
{
$xmldoc = xmldoc($data);
$root = $xmldoc->root();
$this = $this->_deserialize_object($root);
}
// Deserialize Helpers
function _deserialize_var($xmlobj)
{
$type = $xmlobj->getattr("type");
switch($type)
{
case "simple":
return $this->_deserialize_simple($xmlobj);
break;
case "array":
return $this->_deserialize_array($xmlobj);
break;
case "object":
return $this->_deserialize_object($xmlobj);
break;
}
}
function _deserialize_array($xmlobj)
{
$children = $xmlobj->children();
foreach($children as $child)
{
$key = $child->getattr("key");
$obj[$key] = $this->_deserialize_var($child);
}
return $obj;
}
function _deserialize_simple($xmlobj)
{
return $xmlobj->content;
}
function _deserialize_object($xmlobj)
{
if(class_exists($xmlobj->name))
{
$obj = new $xmlobj->name;
$children = $xmlobj->children();
foreach($children as $child)
{
$name = $child->name;
$obj->$name = $this->_deserialize_var($child);
}
}
else
echo $xmlobj->name . " is not a valid class";
return $obj;
}
// Serialize Helpers
function _serialize_object($xmlobj,$name,$var)
{
$members = get_object_vars($var);
if(is_array($members))
{
if($name != null)
{
$child = $xmlobj->new_child($name,"");
$child->setattr("type","object");
}
else
$child = $xmlobj;
$keys = array_keys($members);
foreach($keys as $key)
{
$this->_serialize_var($child,$key,$members[$key]);
}
}
}
function _serialize_array($xmlobj,$name,$var)
{
$keys = array_keys($var);
$child = $xmlobj->new_child($name,"");
$child->setattr("type","array");
foreach($keys as $key)
{
$this->_serialize_var($child,get_class($var[$key]),$var[$key]);
$children = $child->children();
$children[sizeof($children)-1]->setattr("key",$key);
}
}
function _serialize_other($xmlobj,$name,$var)
{
$child = $xmlobj->new_child($name,$var);
$child->setattr("type","simple");
}
function _serialize_var($xmlobj,$name,$var)
{
if(is_array($var))
{
$this->_serialize_array($xmlobj,$name,$var);
}
elseif(is_object($var))
{
$this->_serialize_object($xmlobj,$name,$var);
}
else
{
$this->_serialize_other($xmlobj,$name,$var);
}
}
}
?>
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