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64 lines
1.4 KiB
PHP
Executable File
64 lines
1.4 KiB
PHP
Executable File
<?php
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/** @file keyfilter.inc
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* @ingroup Examples
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* @brief class KeyFilter
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* @author Marcus Boerger
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* @date 2003 - 2005
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*
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* SPL - Standard PHP Library
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*/
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/** @ingroup Examples
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* @brief Regular expression filter for string iterators
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* @author Marcus Boerger
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* @version 1.1
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*
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* Instances of this class act as a filter around iterators whose elements
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* are strings. In other words you can put an iterator into the constructor
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* and the instance will only return elements which match the given regular
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* expression.
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*/
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class KeyFilter extends FilterIterator
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{
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/** @internal regular exoression used as filter */
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private $regex;
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/**
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* Constructs a filter around an iterator whose elemnts are strings.
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* If the given iterator is of type spl_sequence then its rewind()
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* method is called.
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*
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* @param it Object that implements at least spl_forward
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* @param regex Regular expression used as a filter.
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*/
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function __construct(Iterator $it, $regex)
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{
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parent::__construct($it);
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$this->regex = $regex;
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}
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/** \return whether the current key mathes the regular expression
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*/
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function accept()
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{
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return ereg($this->regex, $this->getInnerIterator()->key());
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}
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/** @return regular expression used as filter
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*/
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function getRegex()
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{
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return $this->regex;
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}
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/**
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* hidden __clone
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*/
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protected function __clone()
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{
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// disallow clone
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}
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}
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?>
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