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<?php

/**
 * Class representing SAML 2 metadata PDPDescriptor.
 *
 * @package simpleSAMLphp
 * @version $Id$
 */
class SAML2_XML_md_PDPDescriptor extends SAML2_XML_md_RoleDescriptor {

	/**
	 * List of AuthzService endpoints.
	 *
	 * Array with EndpointType objects.
	 *
	 * @var array
	 */
	public $AuthzService = array();


	/**
	 * List of AssertionIDRequestService endpoints.
	 *
	 * Array with EndpointType objects.
	 *
	 * @var array
	 */
	public $AssertionIDRequestService = array();


	/**
	 * List of supported NameID formats.
	 *
	 * Array of strings.
	 *
	 * @var array
	 */
	public $NameIDFormat = array();


	/**
	 * Initialize an IDPSSODescriptor.
	 *
	 * @param DOMElement|NULL $xml  The XML element we should load.
	 */
	public function __construct(DOMElement $xml = NULL) {
		parent::__construct('md:PDPDescriptor', $xml);

		if ($xml === NULL) {
			return;
		}

		foreach (SAML2_Utils::xpQuery($xml, './saml_metadata:AuthzService') as $ep) {
			$this->AuthzService[] = new SAML2_XML_md_EndpointType($ep);
		}
		if (empty($this->AuthzService)) {
			throw new Exception('Must have at least one AuthzService in PDPDescriptor.');
		}

		foreach (SAML2_Utils::xpQuery($xml, './saml_metadata:AssertionIDRequestService') as $ep) {
			$this->AssertionIDRequestService[] = new SAML2_XML_md_EndpointType($ep);
		}

		$this->NameIDFormat = SAML2_Utils::extractStrings($xml, SAML2_Const::NS_MD, 'NameIDFormat');
	}


	/**
	 * Add this PDPDescriptor to an EntityDescriptor.
	 *
	 * @param DOMElement $parent  The EntityDescriptor we should append this IDPSSODescriptor to.
	 */
	public function toXML(DOMElement $parent) {
		assert('is_array($this->AuthzService)');
		assert('!empty($this->AuthzService)');
		assert('is_array($this->AssertionIDRequestService)');
		assert('is_array($this->NameIDFormat)');

		$e = parent::toXML($parent);

		foreach ($this->AuthzService as $ep) {
			$ep->toXML($e, 'md:AuthzService');
		}

		foreach ($this->AssertionIDRequestService as $ep) {
			$ep->toXML($e, 'md:AssertionIDRequestService');
		}

		SAML2_Utils::addStrings($e, SAML2_Const::NS_MD, 'md:NameIDFormat', FALSE, $this->NameIDFormat);

		return $e;
	}

}