<?php
namespace Symfony\Component\Serializer\Encoder;
use Symfony\Component\Serializer\Exception\UnexpectedValueException;
class XmlEncoder extends SerializerAwareEncoder implements EncoderInterface, DecoderInterface, NormalizationAwareInterface {
private $dom;
private $format;
private $rootNodeName = 'response';
public function __construct($rootNodeName = 'response') {
$this->rootNodeName = $rootNodeName;
}
public function encode($data, $format, array $context = array()) {
if ($data instanceof \DOMDocument) {
return $data
->saveXML();
}
$xmlRootNodeName = $this
->resolveXmlRootName($context);
$this->dom = new \DOMDocument();
$this->format = $format;
if (null !== $data && !is_scalar($data)) {
$root = $this->dom
->createElement($xmlRootNodeName);
$this->dom
->appendChild($root);
$this
->buildXml($root, $data, $xmlRootNodeName);
}
else {
$this
->appendNode($this->dom, $data, $xmlRootNodeName);
}
return $this->dom
->saveXML();
}
public function decode($data, $format, array $context = array()) {
$internalErrors = libxml_use_internal_errors(true);
$disableEntities = libxml_disable_entity_loader(true);
libxml_clear_errors();
$dom = new \DOMDocument();
$dom
->loadXML($data, LIBXML_NONET);
libxml_use_internal_errors($internalErrors);
libxml_disable_entity_loader($disableEntities);
foreach ($dom->childNodes as $child) {
if ($child->nodeType === XML_DOCUMENT_TYPE_NODE) {
throw new UnexpectedValueException('Document types are not allowed.');
}
}
$xml = simplexml_import_dom($dom);
if ($error = libxml_get_last_error()) {
throw new UnexpectedValueException($error->message);
}
if (!$xml
->count()) {
if (!$xml
->attributes()) {
return (string) $xml;
}
$data = array();
foreach ($xml
->attributes() as $attrkey => $attr) {
$data['@' . $attrkey] = (string) $attr;
}
$data['#'] = (string) $xml;
return $data;
}
return $this
->parseXml($xml);
}
public function supportsEncoding($format) {
return 'xml' === $format;
}
public function supportsDecoding($format) {
return 'xml' === $format;
}
public function setRootNodeName($name) {
$this->rootNodeName = $name;
}
public function getRootNodeName() {
return $this->rootNodeName;
}
protected final function appendXMLString($node, $val) {
if (strlen($val) > 0) {
$frag = $this->dom
->createDocumentFragment();
$frag
->appendXML($val);
$node
->appendChild($frag);
return true;
}
return false;
}
protected final function appendText($node, $val) {
$nodeText = $this->dom
->createTextNode($val);
$node
->appendChild($nodeText);
return true;
}
protected final function appendCData($node, $val) {
$nodeText = $this->dom
->createCDATASection($val);
$node
->appendChild($nodeText);
return true;
}
protected final function appendDocumentFragment($node, $fragment) {
if ($fragment instanceof \DOMDocumentFragment) {
$node
->appendChild($fragment);
return true;
}
return false;
}
protected final function isElementNameValid($name) {
return $name && false === strpos($name, ' ') && preg_match('#^[\\pL_][\\pL0-9._-]*$#ui', $name);
}
private function parseXml($node) {
$data = array();
if ($node
->attributes()) {
foreach ($node
->attributes() as $attrkey => $attr) {
$data['@' . $attrkey] = (string) $attr;
}
}
foreach ($node
->children() as $key => $subnode) {
if ($subnode
->count()) {
$value = $this
->parseXml($subnode);
}
elseif ($subnode
->attributes()) {
$value = array();
foreach ($subnode
->attributes() as $attrkey => $attr) {
$value['@' . $attrkey] = (string) $attr;
}
$value['#'] = (string) $subnode;
}
else {
$value = (string) $subnode;
}
if ($key === 'item') {
if (isset($value['@key'])) {
if (isset($value['#'])) {
$data[(string) $value['@key']] = $value['#'];
}
else {
$data[(string) $value['@key']] = $value;
}
}
else {
$data['item'][] = $value;
}
}
elseif (array_key_exists($key, $data) || $key == "entry") {
if (false === is_array($data[$key]) || false === isset($data[$key][0])) {
$data[$key] = array(
$data[$key],
);
}
$data[$key][] = $value;
}
else {
$data[$key] = $value;
}
}
return $data;
}
private function buildXml($parentNode, $data, $xmlRootNodeName = null) {
$append = true;
if (is_array($data) || $data instanceof \Traversable) {
foreach ($data as $key => $data) {
if (0 === strpos($key, "@") && is_scalar($data) && $this
->isElementNameValid($attributeName = substr($key, 1))) {
$parentNode
->setAttribute($attributeName, $data);
}
elseif ($key === '#') {
$append = $this
->selectNodeType($parentNode, $data);
}
elseif (is_array($data) && false === is_numeric($key)) {
if (ctype_digit(implode('', array_keys($data)))) {
foreach ($data as $subData) {
$append = $this
->appendNode($parentNode, $subData, $key);
}
}
else {
$append = $this
->appendNode($parentNode, $data, $key);
}
}
elseif (is_numeric($key) || !$this
->isElementNameValid($key)) {
$append = $this
->appendNode($parentNode, $data, "item", $key);
}
else {
$append = $this
->appendNode($parentNode, $data, $key);
}
}
return $append;
}
if (is_object($data)) {
$data = $this->serializer
->normalize($data, $this->format);
if (null !== $data && !is_scalar($data)) {
return $this
->buildXml($parentNode, $data, $xmlRootNodeName);
}
if (!$parentNode->parentNode->parentNode) {
$root = $parentNode->parentNode;
$root
->removeChild($parentNode);
return $this
->appendNode($root, $data, $xmlRootNodeName);
}
return $this
->appendNode($parentNode, $data, 'data');
}
throw new UnexpectedValueException(sprintf('An unexpected value could not be serialized: %s', var_export($data, true)));
}
private function appendNode($parentNode, $data, $nodeName, $key = null) {
$node = $this->dom
->createElement($nodeName);
if (null !== $key) {
$node
->setAttribute('key', $key);
}
$appendNode = $this
->selectNodeType($node, $data);
if ($appendNode) {
$parentNode
->appendChild($node);
}
return $appendNode;
}
private function needsCdataWrapping($val) {
return preg_match('/[<>&]/', $val);
}
private function selectNodeType($node, $val) {
if (is_array($val)) {
return $this
->buildXml($node, $val);
}
elseif ($val instanceof \SimpleXMLElement) {
$child = $this->dom
->importNode(dom_import_simplexml($val), true);
$node
->appendChild($child);
}
elseif ($val instanceof \Traversable) {
$this
->buildXml($node, $val);
}
elseif (is_object($val)) {
return $this
->buildXml($node, $this->serializer
->normalize($val, $this->format));
}
elseif (is_numeric($val)) {
return $this
->appendText($node, (string) $val);
}
elseif (is_string($val) && $this
->needsCdataWrapping($val)) {
return $this
->appendCData($node, $val);
}
elseif (is_string($val)) {
return $this
->appendText($node, $val);
}
elseif (is_bool($val)) {
return $this
->appendText($node, (int) $val);
}
elseif ($val instanceof \DOMNode) {
$child = $this->dom
->importNode($val, true);
$node
->appendChild($child);
}
return true;
}
private function resolveXmlRootName(array $context = array()) {
return isset($context['xml_root_node_name']) ? $context['xml_root_node_name'] : $this->rootNodeName;
}
}