class.ilADTInteger.php

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<?php
 
class ilADTInteger extends ilADT
{
        protected $value; // [int]
 
        
        // definition
        
        protected function isValidDefinition(ilADTDefinition $a_def)
        {
                return ($a_def instanceof ilADTIntegerDefinition);
        }
        
        public function reset()
        {
                parent::reset();
                
                $this->value = null;
        }
        
        
        // properties
                        
        public function setNumber($a_value = null)
        {               
                $this->value = $this->getDefinition()->handleNumber($a_value);
        }
        
        public function getNumber()
        {
                return $this->value;
        }
 
        
        // comparison
 
        public function equals(ilADT $a_adt)
        {
                if($this->getDefinition()->isComparableTo($a_adt))
                {
                        return ($this->getNumber() == $a_adt->getNumber());
                }
        }
                                
        public function isLarger(ilADT $a_adt)
        {
                if($this->getDefinition()->isComparableTo($a_adt))
                {
                        return ($this->getNumber() > $a_adt->getNumber());
                }
        }
        
        public function isSmaller(ilADT $a_adt)
        {
                if($this->getDefinition()->isComparableTo($a_adt))
                {
                        return ($this->getNumber() < $a_adt->getNumber());
                }
        }
 
        
        // null
        
        public function isNull()
        {
                return ($this->getNumber() === null);
        }
        
        
        // validation
        
        public function isValid()
        {
                $valid = parent::isValid();
                
                $num = $this->getNumber();
                if($num !== null)
                {                                                       
                        $min = $this->getDefinition()->getMin();
                        if($min !== null && $num < $min)
                        {
                                $this->addValidationError(self::ADT_VALIDATION_ERROR_MIN);
                                $valid = false;
                        }
 
                        $max = $this->getDefinition()->getMax();
                        if($max !== null && $num > $max)
                        {
                                $this->addValidationError(self::ADT_VALIDATION_ERROR_MAX);
                                $valid = false;
                        }
                }
                
                return $valid;
        }
        
        
        // check
        
        public function getCheckSum()
        {
                if(!$this->isNull())
                {
                        return (string)$this->getNumber();
                }
        }       
}
 
?>