IntegerRangeValidator.java example

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jcommune-master
/**
 * Copyright (C) 2011  JTalks.org Team
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
package org.jtalks.jcommune.model.validation.validators;

import org.jtalks.jcommune.model.validation.annotations.IntegerRange;

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;

/**
 * Validator for {@link IntegerRange} annotation
 * @author skythet
 */
public class IntegerRangeValidator implements ConstraintValidator<IntegerRange, String> {

    private int min;
    private int max;

    /**
     * {@inheritDoc}
     */
    @Override
    public void initialize(IntegerRange constraintAnnotation) {
        min = constraintAnnotation.min();
        max = constraintAnnotation.max();
    }

    @Override
    public boolean isValid(String value, ConstraintValidatorContext context) {
        if (value == null) {
            return false;
        }
        try {
            int intValue = Integer.parseInt(value);
            return intValue >= min && intValue <= max;
        } catch (NumberFormatException exception) {
            return false;
        }
    }
}