AssertionTuple with DataSetValue stack

gistfile1.aw

<?php

class DataSetValue
{
    const ALPHA_LOWER = 'abcdefghijklmnopqrstuvwxyz';
    const ALPHA_UPPER = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
    const ALPHA_NUMERIC = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
    
    const SYMBOLS       = '!@£$%^&*()-=';
    const SECURITY_XSS  = "'';!--\"<XSS>=&{()}";

    
    /**
     * Data
     *
     * @access protected
     * @var $data
     */
    protected $data;
    
    /**
     * Data Length
     *
     * @var $dataLength;
     * @access protected
     */
    protected $dataLength;

    public function __construct($data = self::ALPHA_NUMERIC, $dataLength = 62) 
    {
        $this->setData($data);
        $this->setDataLength($dataLength);
    }
    
    /**
     * set data type
     *
     * @param $value
     * @access public
     */
    public function setData($value)
    {
        $this->data = $value;
    }
    
    /**
     * Get data
     *
     * @return $data
     */
    public function getData()
    {
        return $this->data;
    }
    
    /**
     * Set data length
     *
     * @param $value length of string to return
     * @access public
     */
    public function setDataLength($value)
    {
        $this->dataLength = $value;
    }
    
    /**
     * Get data length
     *
     * @access public
     * @return $dataLength
     */
    public function getDataLength()
    {
        return $this->dataLength;
    }

    public function __toString()
    {
        return substr($this->getData(), 0, $this->getDataLength()); 
    }   
}

class AssertionTuple
{
    protected $assertionMethod = ''; 
    protected $data;

    public function __construct($assertionMethod, DataSetValue $data)
    {
        $this->setAssertionMethod($assertionMethod);
        $this->setData($data);
    }

    /**
     * Set assertion method
     *
     * @param $assertionMethod
     * @access public
     */
    public function setAssertionMethod($method)
    {
        $this->assertionMethod = 'assert' . ucfirst($method);
    }
    /**
     * Get assertion method
     *
     * @access public
     * @return $assertionMethod
     */
    public function getAssertionMethod()
    {
        return $this->assertionMethod;
    }

    /**
     * Set data
     *
     * @param $value
     * @access public
     */
    public function setData($value)
    {
        $this->data = $value;
    }

    public function getData()
    {
        return $this->data;
    }
}

class AssertionStack
    implements Iterator
{
    private $position = 0;
    protected $stack = array();

    public function push(AssertionTuple $tuple)
    {
        $this->stack[] = $tuple;
    }

    public function rewind()
    {
        $this->position = 0;
    }

    public function current()
    {
        return $this->stack[$this->position]->getData();
    }

    public function key()
    {
        return $this->stack[$this->position]->getAssertionMethod();
    }

    public function next()
    {
        ++$this->position;
    }

    public function valid()
    {
        return isset($this->stack[$this->position]);
    }
}