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);
}