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();
        }
    }
}