Node.php

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<?php

namespace Sabre\VObject;

use Sabre\Xml;

abstract class Node
    implements \IteratorAggregate,
               \ArrayAccess,
               \Countable,
               \JsonSerializable,
               Xml\XmlSerializable {

    const REPAIR = 1;

    const PROFILE_CARDDAV = 2;

    const PROFILE_CALDAV = 4;

    public $parent;

    protected $iterator = null;

    protected $root;

    abstract function serialize();

    abstract function jsonSerialize();

    abstract function xmlSerialize(Xml\Writer $writer);

    function destroy() {

        $this->parent = null;
        $this->root = null;

    }

    /* {{{ IteratorAggregator interface */

    function getIterator() {

        if (!is_null($this->iterator)) {
            return $this->iterator;
        }

        return new ElementList([$this]);

    }

    function setIterator(ElementList $iterator) {

        $this->iterator = $iterator;

    }

    function validate($options = 0) {

        return [];

    }

    /* }}} */

    /* {{{ Countable interface */

    function count() {

        $it = $this->getIterator();
        return $it->count();

    }

    /* }}} */

    /* {{{ ArrayAccess Interface */


    function offsetExists($offset) {

        $iterator = $this->getIterator();
        return $iterator->offsetExists($offset);

    }

    function offsetGet($offset) {

        $iterator = $this->getIterator();
        return $iterator->offsetGet($offset);

    }

    function offsetSet($offset, $value) {

        $iterator = $this->getIterator();
        $iterator->offsetSet($offset, $value);

    // @codeCoverageIgnoreStart
    //
    // This method always throws an exception, so we ignore the closing
    // brace
    }
    // @codeCoverageIgnoreEnd

    function offsetUnset($offset) {

        $iterator = $this->getIterator();
        $iterator->offsetUnset($offset);

    // @codeCoverageIgnoreStart
    //
    // This method always throws an exception, so we ignore the closing
    // brace
    }
    // @codeCoverageIgnoreEnd

    /* }}} */
}