# IdentifiableTree.class.php

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    00001 <?php
    00002 /****************************************************************************
    00003  *   Copyright (C) 2005-2007 by Konstantin V. Arkhipov, Anton E. Lebedevich *
    00004  *                                                                          *
    00005  *   This program is free software; you can redistribute it and/or modify   *
    00006  *   it under the terms of the GNU Lesser General Public License as         *
    00007  *   published by the Free Software Foundation; either version 3 of the     *
    00008  *   License, or (at your option) any later version.                        *
    00009  *                                                                          *
    00010  ****************************************************************************/
    00011
    00017     abstract class IdentifiableTree
    00018         extends IdentifiableObject
    00019         implements Stringable
    00020     {
    00021         private $parent = null;
    00022
    00026         public function getParent()
    00027         {
    00028             return $this->parent;
    00029         }
    00030
    00034         public function setParent(IdentifiableTree $parent)
    00035         {
    00036             Assert::brothers($this, $parent);
    00037
    00038             $this->parent = $parent;
    00039
    00040             return $this;
    00041         }
    00042
    00046         public function dropParent()
    00047         {
    00048             $this->parent = null;
    00049
    00050             return $this;
    00051         }
    00052
    00056         public function getRoot()
    00057         {
    00058             $current = $this;
    00059             $next = $this;
    00060
    00061             while ($next) {
    00062                 $current = $next;
    00063                 $next = $next->getParent();
    00064             }
    00065
    00066             return $current;
    00067         }
    00068
    00069         public function toString($delimiter = ', ')
    00070         {
    00071             $ids = array($this->getId());
    00072
    00073             $parent = $this;
    00074
    00075             while ($parent = $parent->getParent())
    00076                 $ids[] = $parent->getId();
    00077
    00078             $ids = array_reverse($ids);
    00079
    00080             return implode($delimiter, $ids);
    00081         }
    00082     }
    00083 ?>