/**
 * xarTpl__XarPINode: <xar:pi /> tag class
 *
 * Generates a processing instruction
 * @package blocklayout
 * @access private
 */
class xarTpl__XarPINode extends xarTpl__TplTagNode
{
    function __construct(&$parser, $tagName, $parentTagName='', $parameters=array())
    {
        parent::__construct($parser, $tagName, $parentTagName, $parameters);
    }
    
    function render()
    {        
        if (!array_key_exists('target', $this->attributes)) {
            $this->raiseError(XAR_BL_MISSING_ATTRIBUTE,'Missing \'target\' attribute in <xar:pi> tag.');
            return;
        }
        $target = $this->attributes['target'];
        unset($this->attributes['target']);
        
        $attributes = '';
        foreach ($this->attributes as $k => $v) {
            $attributes .= $k.'="'.$v.'"';
        }
        return "echo '<?$target $attributes ?>'";
    }
}
?>