filteriterator.inc

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<?php

abstract class FilterIterator implements OuterIterator
{
    private $it;

    function __construct(Iterator $it) {
        $this->it = $it;
    }

    function rewind() { 
        $this->it->rewind();
        $this->fetch();
    }

    abstract function accept();

    protected function fetch() {
        while ($this->it->valid()) {
            if ($this->accept()) {
                return;
            }
            $this->it->next();
        };
    }

    function next() {
        $this->it->next();
        $this->fetch();
    }
    
    function valid() {
        return $this->it->valid();
    }
    
    function key() {
        return $this->it->key();
    }
    
    function current() {
        return $this->it->current();
    }
    
    protected function __clone() {
        // disallow clone 
    }

    function getInnerIterator()
    {
        return $this->it;
    }

    function __call($func, $params)
    {
        return call_user_func_array(array($this->it, $func), $params);
    }
}

?>

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