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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Amf
* @subpackage Parse_Amf3
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Serializer.php 18951 2009-11-12 16:26:19Z alexander $
*/
/** Zend_Amf_Parse_Serializer */
require_once 'Zend/Amf/Parse/Serializer.php';
/** Zend_Amf_Parse_TypeLoader */
require_once 'Zend/Amf/Parse/TypeLoader.php';
/**
* Detect PHP object type and convert it to a corresponding AMF3 object type
*
* @package Zend_Amf
* @subpackage Parse_Amf3
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Amf_Parse_Amf3_Serializer extends Zend_Amf_Parse_Serializer
{
/**
* An array of reference objects per amf body
* @var array
*/
protected $_referenceObjects = array();
/**
* An array of reference strings per amf body
* @var array
*/
protected $_referenceStrings = array();
/**
* An array of reference class definitions, indexed by classname
* @var array
*/
protected $_referenceDefinitions = array();
/**
* Serialize PHP types to AMF3 and write to stream
*
* Checks to see if the type was declared and then either
* auto negotiates the type or use the user defined markerType to
* serialize the data from php back to AMF3
*
* @param mixed $content
* @param int $markerType
* @return void
*/
public function writeTypeMarker($data, $markerType=null)
{
if (null !== $markerType) {
// Write the Type Marker to denote the following action script data type
$this->_stream->writeByte($markerType);
switch ($markerType) {
case Zend_Amf_Constants::AMF3_NULL:
break;
case Zend_Amf_Constants::AMF3_BOOLEAN_FALSE:
break;
case Zend_Amf_Constants::AMF3_BOOLEAN_TRUE:
break;
case Zend_Amf_Constants::AMF3_INTEGER:
$this->writeInteger($data);
break;
case Zend_Amf_Constants::AMF3_NUMBER:
$this->_stream->writeDouble($data);
break;
case Zend_Amf_Constants::AMF3_STRING:
$this->writeString($data);
break;
case Zend_Amf_Constants::AMF3_DATE:
$this->writeDate($data);
break;
case Zend_Amf_Constants::AMF3_ARRAY:
$this->writeArray($data);
break;
case Zend_Amf_Constants::AMF3_OBJECT:
$this->writeObject($data);
break;
case Zend_Amf_Constants::AMF3_BYTEARRAY:
$this->writeByteArray($data);
break;
case Zend_Amf_Constants::AMF3_XMLSTRING;
$this->writeXml($data);
break;
default:
require_once 'Zend/Amf/Exception.php';
throw new Zend_Amf_Exception('Unknown Type Marker: ' . $markerType);
}
} else {
// Detect Type Marker
if(is_resource($data)) {
$data = Zend_Amf_Parse_TypeLoader::handleResource($data);
}
switch (true) {
case (null === $data):
$markerType = Zend_Amf_Constants::AMF3_NULL;
break;
case (is_bool($data)):
if ($data){
$markerType = Zend_Amf_Constants::AMF3_BOOLEAN_TRUE;
} else {
$markerType = Zend_Amf_Constants::AMF3_BOOLEAN_FALSE;
}
break;
case (is_int($data)):
if (($data > 0xFFFFFFF) || ($data < -268435456)) {
$markerType = Zend_Amf_Constants::AMF3_NUMBER;
} else {
$markerType = Zend_Amf_Constants::AMF3_INTEGER;
}
break;
case (is_float($data)):
$markerType = Zend_Amf_Constants::AMF3_NUMBER;
break;
case (is_string($data)):
$markerType = Zend_Amf_Constants::AMF3_STRING;
break;
case (is_array($data)):
$markerType = Zend_Amf_Constants::AMF3_ARRAY;
break;
case (is_object($data)):
// Handle object types.
if (($data instanceof DateTime) || ($data instanceof Zend_Date)) {
$markerType = Zend_Amf_Constants::AMF3_DATE;
} else if ($data instanceof Zend_Amf_Value_ByteArray) {
$markerType = Zend_Amf_Constants::AMF3_BYTEARRAY;
} else if (($data instanceof DOMDocument) || ($data instanceof SimpleXMLElement)) {
$markerType = Zend_Amf_Constants::AMF3_XMLSTRING;
} else {
$markerType = Zend_Amf_Constants::AMF3_OBJECT;
}
break;
default:
require_once 'Zend/Amf/Exception.php';
throw new Zend_Amf_Exception('Unsupported data type: ' . gettype($data));
}
$this->writeTypeMarker($data, $markerType);
}
}
/**
* Write an AMF3 integer
*
* @param int|float $data
* @return Zend_Amf_Parse_Amf3_Serializer
*/
public function writeInteger($int)
{
if (($int & 0xffffff80) == 0) {
$this->_stream->writeByte($int & 0x7f);
return $this;
}
if (($int & 0xffffc000) == 0 ) {
$this->_stream->writeByte(($int >> 7 ) | 0x80);
$this->_stream->writeByte($int & 0x7f);
return $this;
}
if (($int & 0xffe00000) == 0) {
$this->_stream->writeByte(($int >> 14 ) | 0x80);
$this->_stream->writeByte(($int >> 7 ) | 0x80);
$this->_stream->writeByte($int & 0x7f);
return $this;
}
$this->_stream->writeByte(($int >> 22 ) | 0x80);
$this->_stream->writeByte(($int >> 15 ) | 0x80);
$this->_stream->writeByte(($int >> 8 ) | 0x80);
$this->_stream->writeByte($int & 0xff);
return $this;
}
/**
* Send string to output stream, without trying to reference it.
* The string is prepended with strlen($string) << 1 | 0x01
*
* @param string $string
* @return Zend_Amf_Parse_Amf3_Serializer
*/
protected function writeBinaryString($string){
$ref = strlen($string) << 1 | 0x01;
$this->writeInteger($ref);
$this->_stream->writeBytes($string);
return $this;
}
/**
* Send string to output stream
*
* @param string $string
* @return Zend_Amf_Parse_Amf3_Serializer
*/
public function writeString($string)
{
$len = strlen($string);
if(!$len){
$this->writeInteger(0x01);
return $this;
}
$ref = array_search($string, $this->_referenceStrings, true);
if($ref === false){
$this->_referenceStrings[] = $string;
$this->writeBinaryString($string);
} else {
$ref <<= 1;
$this->writeInteger($ref);
}
return $this;
}
/**
* Send ByteArray to output stream
*
* @param string|Zend_Amf_Value_ByteArray $data
* @return Zend_Amf_Parse_Amf3_Serializer
*/
public function writeByteArray($data){
if($this->writeObjectReference($data)){
return $this;
}
if(is_string($data)) {
//nothing to do
} else if ($data instanceof Zend_Amf_Value_ByteArray) {
$data = $data->getData();
} else {
require_once 'Zend/Amf/Exception.php';
throw new Zend_Amf_Exception('Invalid ByteArray specified; must be a string or Zend_Amf_Value_ByteArray');
}
$this->writeBinaryString($data);
return $this;
}
/**
* Send xml to output stream
*
* @param DOMDocument|SimpleXMLElement $xml
* @return Zend_Amf_Parse_Amf3_Serializer
*/
public function writeXml($xml)
{
if($this->writeObjectReference($xml)){
return $this;
}
if(is_string($xml)) {
//nothing to do
} else if ($xml instanceof DOMDocument) {
$xml = $xml->saveXml();
} else if ($xml instanceof SimpleXMLElement) {
$xml = $xml->asXML();
} else {
require_once 'Zend/Amf/Exception.php';
throw new Zend_Amf_Exception('Invalid xml specified; must be a DOMDocument or SimpleXMLElement');
}
$this->writeBinaryString($xml);
return $this;
}
/**
* Convert DateTime/Zend_Date to AMF date
*
* @param DateTime|Zend_Date $date
* @return Zend_Amf_Parse_Amf3_Serializer
*/
public function writeDate($date)
{
if($this->writeObjectReference($date)){
return $this;
}
if ($date instanceof DateTime) {
$dateString = $date->format('U') * 1000;
} elseif ($date instanceof Zend_Date) {
$dateString = $date->toString('U') * 1000;
} else {
require_once 'Zend/Amf/Exception.php';
throw new Zend_Amf_Exception('Invalid date specified; must be a string DateTime or Zend_Date object');
}
$this->writeInteger(0x01);
// write time to stream minus milliseconds
$this->_stream->writeDouble($dateString);
return $this;
}
/**
* Write a PHP array back to the amf output stream
*
* @param array $array
* @return Zend_Amf_Parse_Amf3_Serializer
*/
public function writeArray(array $array)
{
if($this->writeObjectReference($array)){
return $this;
}
// have to seperate mixed from numberic keys.
$numeric = array();
$string = array();
foreach ($array as $key => $value) {
if (is_int($key)) {
$numeric[] = $value;
} else {
$string[$key] = $value;
}
}
// write the preamble id of the array
$length = count($numeric);
$id = ($length << 1) | 0x01;
$this->writeInteger($id);
//Write the mixed type array to the output stream
foreach($string as $key => $value) {
$this->writeString($key)
->writeTypeMarker($value);
}
$this->writeString('');
// Write the numeric array to ouput stream
foreach($numeric as $value) {
$this->writeTypeMarker($value);
}
return $this;
}
/**
* Check if the given object is in the reference table, write the reference if it exists,
* otherwise add the object to the reference table
*
* @param mixed $object object to check for reference
* @return Boolean true, if the reference was written, false otherwise
*/
protected function writeObjectReference($object){
$ref = array_search($object, $this->_referenceObjects,true);
//quickly handle object references
if($ref !== false){
$ref <<= 1;
$this->writeInteger($ref);
return true;
}
$this->_referenceObjects[] = $object;
return false;
}
/**
* Write object to ouput stream
*
* @param mixed $data
* @return Zend_Amf_Parse_Amf3_Serializer
*/
public function writeObject($object)
{
if($this->writeObjectReference($object)){
return $this;
}
$className = '';
//Check to see if the object is a typed object and we need to change
switch (true) {
// the return class mapped name back to actionscript class name.
case ($className = Zend_Amf_Parse_TypeLoader::getMappedClassName(get_class($object))):
break;
// Check to see if the user has defined an explicit Action Script type.
case isset($object->_explicitType):
$className = $object->_explicitType;
break;
// Check if user has defined a method for accessing the Action Script type
case method_exists($object, 'getASClassName'):
$className = $object->getASClassName();
break;
// No return class name is set make it a generic object
case ($object instanceof stdClass):
$className = '';
break;
// By default, use object's class name
default:
$className = get_class($object);
break;
}
$writeTraits = true;
//check to see, if we have a corresponding definition
if(array_key_exists($className, $this->_referenceDefinitions)){
$traitsInfo = $this->_referenceDefinitions[$className]['id'];
$encoding = $this->_referenceDefinitions[$className]['encoding'];
$propertyNames = $this->_referenceDefinitions[$className]['propertyNames'];
$traitsInfo = ($traitsInfo << 2) | 0x01;
$writeTraits = false;
} else {
$propertyNames = array();
if($className == ''){
//if there is no className, we interpret the class as dynamic without any sealed members
$encoding = Zend_Amf_Constants::ET_DYNAMIC;
} else {
$encoding = Zend_Amf_Constants::ET_PROPLIST;
foreach($object as $key => $value) {
if( $key[0] != "_") {
$propertyNames[] = $key;
}
}
}
$this->_referenceDefinitions[$className] = array(
'id' => count($this->_referenceDefinitions),
'encoding' => $encoding,
'propertyNames' => $propertyNames,
);
$traitsInfo = Zend_Amf_Constants::AMF3_OBJECT_ENCODING;
$traitsInfo |= $encoding << 2;
$traitsInfo |= (count($propertyNames) << 4);
}
$this->writeInteger($traitsInfo);
if($writeTraits){
$this->writeString($className);
foreach ($propertyNames as $value) {
$this->writeString($value);
}
}
try {
switch($encoding) {
case Zend_Amf_Constants::ET_PROPLIST:
//Write the sealed values to the output stream.
foreach ($propertyNames as $key) {
$this->writeTypeMarker($object->$key);
}
break;
case Zend_Amf_Constants::ET_DYNAMIC:
//Write the sealed values to the output stream.
foreach ($propertyNames as $key) {
$this->writeTypeMarker($object->$key);
}
//Write remaining properties
foreach($object as $key => $value){
if(!in_array($key,$propertyNames) && $key[0] != "_"){
$this->writeString($key);
$this->writeTypeMarker($value);
}
}
//Write an empty string to end the dynamic part
$this->writeString('');
break;
case Zend_Amf_Constants::ET_EXTERNAL:
require_once 'Zend/Amf/Exception.php';
throw new Zend_Amf_Exception('External Object Encoding not implemented');
break;
default:
require_once 'Zend/Amf/Exception.php';
throw new Zend_Amf_Exception('Unknown Object Encoding type: ' . $encoding);
}
} catch (Exception $e) {
require_once 'Zend/Amf/Exception.php';
throw new Zend_Amf_Exception('Unable to writeObject output: ' . $e->getMessage());
}
return $this;
}
}
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