49 lines
1.3 KiB
PHP
49 lines
1.3 KiB
PHP
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<?php
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abstract class Parentum extends Node {
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/*---------------------------
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This class allows external access to the child-node list.
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Use the NodeIterator to iterate through the list since
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the numeric array keys might have gaps due to node removals!
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Once init() has been called, an AVLTree is used to support the
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functions removeChild() and findChild(). init() must be called
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before adding any nodes!
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---------------------------*/
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protected $nodes;
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function Parentum() {
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parent::__construct();
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$this->nodes = new DLL(); // Doubly Linked List
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}
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abstract protected function makeChild($args); // overwriteable child generator; allows to define child type (eg.: admin classes that inherit from base class)
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function isEmpty() {
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return $this->nodes->isEmpty();
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}
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function addChild($data,$b = null) {
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$this->nodes->addNode($data,$b);
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}
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function removeChild($id) {
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$this->nodes->removeNode($id);
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}
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function getChildByID($id) { // returns a DLL node
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return $this->nodes->findNode($id);
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}
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function getChildDataByID($id) { // returns the actual content of the found DLL node
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$tmp = $this->getChildByID($id);
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if($tmp != null) {
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return $tmp->data;
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}
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return null;
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}
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function getIterator() {
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return $this->nodes->getIterator();
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}
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}
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?>
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