trunk/bval-jsr303/src/main/java/org/apache/bval/constraints/FutureValidatorForCalendar.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.bval.constraints;

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import javax.validation.constraints.Future;
import java.util.Calendar;

/**
 * Description: validate a date or calendar representing a date in the future <br/>
 */
public class FutureValidatorForCalendar implements ConstraintValidator<Future, Calendar> {

    public void initialize(Future annotation) {
    }

    public boolean isValid(Calendar cal, ConstraintValidatorContext context) {
        return cal == null || cal.after(now());
    }


    /**
     * overwrite when you need a different algorithm for 'now'.
     *
     * @return current date/time
     */
    protected Calendar now() {
        return Calendar.getInstance();
    }
}