139 lines
3.1 KiB
PHP
139 lines
3.1 KiB
PHP
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<?php
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/**
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* MiniXML - PHP class library for generating and parsing XML.
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*
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* @package miniXML
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* @author Patrick Deegan, Psychogenic.com
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* @license GPL
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*/
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/***************************************************************************************************
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****************************************************************************************************
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*****
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***** MiniXMLTreeComponent
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*****
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****************************************************************************************************
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***************************************************************************************************/
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/* MiniXMLTreeComponent class
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** This class is only to be used as a base class
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** for others.
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**
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** It presents the minimal interface we can expect
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** from any component in the XML hierarchy.
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**
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** All methods of this base class
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** simply return NULL except a little default functionality
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** included in the parent() method.
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**
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** Warning: This class is not to be instatiated.
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** Derive and override.
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**
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*/
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class MiniXMLTreeComponent {
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var $xparent;
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/* MiniXMLTreeComponent
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** Constructor. Creates a new MiniXMLTreeComponent object.
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**
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*/
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function MiniXMLTreeComponent ()
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{
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$this->xparent = NULL;
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} /* end MiniXMLTreeComponent constructor */
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/* Get set function for the element name
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*/
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function name ($setTo=NULL)
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{
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return NULL;
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}
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/* Function to fetch an element */
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function & getElement ($name)
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{
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return NULL;
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}
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/* Function that returns the value of this
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component and its children */
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function getValue ()
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{
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return NULL;
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}
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/* parent NEWPARENT
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**
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** The parent() method is used to get/set the element's parent.
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**
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** If the NEWPARENT parameter is passed, sets the parent to NEWPARENT
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** (NEWPARENT must be an instance of a class derived from MiniXMLTreeComponent)
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**
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** Returns a reference to the parent MiniXMLTreeComponent if set, NULL otherwise.
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*/
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function &parent (&$setParent)
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{
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if (! is_null($setParent))
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{
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/* Parents can only be MiniXMLElement objects */
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if (! method_exists($setParent, 'MiniXMLTreeComponent'))
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{
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return _MiniXMLError("MiniXMLTreeComponent::parent(): Must pass an instance derived from "
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. "MiniXMLTreeComponent to set.");
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}
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$this->xparent = $setParent;
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}
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return $this->xparent;
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}
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/* Return a stringified version of the XML representing
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this component and all sub-components */
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function toString ($depth=0)
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{
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return NULL;
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}
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/* dump
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** Debugging aid, dump returns a nicely formatted dump of the current structure of the
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** MiniXMLTreeComponent-derived object.
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*/
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function dump ()
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{
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return var_dump($this);
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}
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/* helper class that everybody loves */
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function _spaceStr ($numSpaces)
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{
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$retStr = '';
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if ($numSpaces < 0)
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{
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return $retStr;
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}
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for($i = 0; $i < $numSpaces; $i++)
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{
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$retStr .= ' ';
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}
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return $retStr;
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}
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/* Destructor to keep things clean -- patch by Ilya */
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function __destruct()
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{
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$this->xparent = null;
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}
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} /* end class definition */
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?>
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