Abstract.php

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<?php

abstract class CAS_ProxiedService_Abstract implements CAS_ProxiedService, CAS_ProxiedService_Testable
{

    private $_proxyTicket;

    public function setProxyTicket($proxyTicket)
    {
        if (empty($proxyTicket)) {
            throw new CAS_InvalidArgumentException(
                'Trying to initialize with an empty proxy ticket.'
            );
        }
        if (!empty($this->_proxyTicket)) {
            throw new CAS_OutOfSequenceException(
                'Already initialized, cannot change the proxy ticket.'
            );
        }
        $this->_proxyTicket = $proxyTicket;
    }

    protected function getProxyTicket()
    {
        if (empty($this->_proxyTicket)) {
            throw new CAS_OutOfSequenceException(
                'No proxy ticket yet. Call $this->initializeProxyTicket() to aquire the proxy ticket.'
            );
        }

        return $this->_proxyTicket;
    }

    private $_casClient;

    public function setCasClient(CAS_Client $casClient)
    {
        if (!empty($this->_proxyTicket)) {
            throw new CAS_OutOfSequenceException(
                'Already initialized, cannot change the CAS_Client.'
            );
        }

        $this->_casClient = $casClient;
    }

    protected function initializeProxyTicket()
    {
        if (!empty($this->_proxyTicket)) {
            throw new CAS_OutOfSequenceException(
                'Already initialized, cannot initialize again.'
            );
        }
        // Allow usage of a particular CAS_Client for unit testing.
        if (empty($this->_casClient)) {
            phpCAS::initializeProxiedService($this);
        } else {
            $this->_casClient->initializeProxiedService($this);
        }
    }
}