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<?php
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/*
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* $Id: PreOrderNodeIterator.php 1262 2009-10-26 20:54:39Z francois $
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information please see
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* <http://propel.phpdb.org>.
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*/
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/**
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* Pre-order node iterator for Node objects.
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*
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* @author Dave Lawson <dlawson@masterytech.com>
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* @version $Revision: 1262 $
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* @package propel.om
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*/
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class PreOrderNodeIterator implements Iterator
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{
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private $topNode = null;
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private $curNode = null;
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private $querydb = false;
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private $con = null;
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public function __construct($node, $opts) {
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$this->topNode = $node;
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$this->curNode = $node;
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if (isset($opts['con']))
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$this->con = $opts['con'];
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if (isset($opts['querydb']))
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$this->querydb = $opts['querydb'];
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}
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public function rewind() {
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$this->curNode = $this->topNode;
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}
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public function valid() {
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return ($this->curNode !== null);
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}
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public function current() {
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return $this->curNode;
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}
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public function key() {
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return $this->curNode->getNodePath();
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}
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public function next() {
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if ($this->valid())
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{
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$nextNode = $this->curNode->getFirstChildNode($this->querydb, $this->con);
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while ($nextNode === null)
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{
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if ($this->curNode === null || $this->curNode->equals($this->topNode))
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break;
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$nextNode = $this->curNode->getSiblingNode(false, $this->querydb, $this->con);
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if ($nextNode === null)
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$this->curNode = $this->curNode->getParentNode($this->querydb, $this->con);
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}
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$this->curNode = $nextNode;
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}
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return $this->curNode;
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}
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}
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