class.ilADTText.php

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<?php

class ilADTText extends ilADT
{
        protected $value; // [string]

        
        // definition
        
        protected function isValidDefinition(ilADTDefinition $a_def)
        {
                return ($a_def instanceof ilADTTextDefinition);
        }
        
        public function reset()
        {
                parent::reset();
                
                $this->value = null;
        }
        
        
        // properties
        
        public function setText($a_value = null)
        {
                if($a_value !== null)
                {
                        $a_value = trim($a_value);
                }
                $this->value = $a_value;
        }
        
        public function getText()
        {
                return $this->value;
        }
        
        public function getLength()
        {
                // see ilStr::strLen();
                // not using ilStr to reduce dependencies in this low-level code
                
                if(function_exists("mb_strlen"))
                {
                        return mb_strlen($this->getText(), "UTF-8");
                }
                else
                {
                        return strlen($this->getText());
                }               
        }
        
        
        // comparison
        
        public function equals(ilADT $a_adt)
        {
                if($this->getDefinition()->isComparableTo($a_adt))
                {                       
                        return !strcmp($this->getText(), $a_adt->getText());
                }
        }
                                
        public function isLarger(ilADT $a_adt)
        {
                // return null?
        }

        public function isSmaller(ilADT $a_adt)
        {
                // return null?
        }
        
        
        // null
        
        public function isNull()
        {               
                return !(bool)$this->getLength();
        }
        
        
        // validation
        
        public function isValid()
        {
                $valid = parent::isValid();
                
                if(!$this->isNull())
                {
                        $max = $this->getDefinition()->getMaxLength();
                        if($max && $max < $this->getLength())
                        {
                                $valid = false;
                                $this->addValidationError(self::ADT_VALIDATION_ERROR_MAX_LENGTH);                               
                        }
                }
                        
                return $valid;
        }
        
        
        // check
        
        public function getCheckSum()
        {
                if(!$this->isNull())
                {
                        return md5($this->getText());
                }
        }       
}

?>