class.ilADTDefinition.php

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<?php
/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */
 
abstract class ilADTDefinition
{
        protected $allow_null; // [bool]
        
        public function __construct()
        {
                $this->reset();
        }
        
        public function getType()
        {
                return substr(substr(get_class($this), 5), 0, -10);
        }
        
        protected function reset()
        {
                $this->setAllowNull(true);
        }
        
        
        //
        // null
        //
        
        public function setAllowNull($a_value)
        {
                $this->allow_null = (bool)$a_value;
        }
        
        public function isNullAllowed()
        {
                return $this->allow_null;
        }
        
        
        //
        // comparison
        //
        
        abstract public function isComparableTo(ilADT $a_adt);          
}
 
?>