com.trenako.validation.MoneyValidator.java Source code

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Here is the source code for com.trenako.validation.MoneyValidator.java

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/*
 * Copyright 2012 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.trenako.validation;

import java.util.Currency;

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

import org.apache.commons.lang3.StringUtils;

import com.trenako.entities.Money;
import com.trenako.validation.constraints.ValidMoney;

/**
 * @author Carlo Micieli
 */
public class MoneyValidator implements ConstraintValidator<ValidMoney, Money> {

    @Override
    public void initialize(ValidMoney constraintAnnotation) {
    }

    @Override
    public boolean isValid(Money money, ConstraintValidatorContext context) {
        if (money == null || money.isEmpty()) {
            return true;
        }

        if (money.getValue() <= 0) {
            return false;
        }

        if (!validCurrency(money)) {
            return false;
        }

        return true;
    }

    private static boolean validCurrency(Money m) {
        if (StringUtils.isBlank(m.getCurrency()))
            return false;

        try {
            Currency.getInstance(m.getCurrency());
            return true;
        } catch (IllegalArgumentException ex) {
            // currencyCode is not a supported ISO 4217 code
        }

        return false;
    }
}