DecimalMinValidator.java

package nl.fontys.sofa.limo.validation.utils;

import java.lang.reflect.Field;
import java.math.BigDecimal;
import nl.fontys.sofa.limo.validation.ValidationException;
import nl.fontys.sofa.limo.validation.annotations.DecimalMin;

public class DecimalMinValidator implements FieldValidator<DecimalMin> {

    @Override
    public void validate(DecimalMin min, Field field, Object value) throws ValidationException {
        double val = Double.valueOf(min.value());
        if (value instanceof BigDecimal) {
            if (((BigDecimal)value).compareTo(BigDecimal.valueOf(val)) < 0) {
                throw new ValidationException(field.getName() + " value should be at least " + val);
            }
        } else if (value instanceof Float) {
            if ((Float) value < val) {
                throw new ValidationException(field.getName() + " value should be at least " + val);
            }
        } else if (value instanceof Double) {
            if ((Double) value < val) {
                throw new ValidationException(field.getName() + " value should be at least " + val);
            }
        }
    }
    
}