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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      https://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.apache.commons.validator;
19  
20  import org.apache.commons.validator.routines.CreditCardValidator;
21  import org.apache.commons.validator.routines.UrlValidator;
22  
23  /**
24   * Defines constants to avoid an NPE for [VALIDATOR-502] Circular dependency in static initialization causes NPE in GenericValidator.isCreditCard().
25   */
26  final class Constants {
27  
28      /**
29       * CreditCardValidator used in wrapper method.
30       */
31      static final CreditCardValidator CREDIT_CARD_VALIDATOR = new CreditCardValidator();
32  
33      /**
34       * UrlValidator used in wrapper method.
35       */
36      static final UrlValidator URL_VALIDATOR = new UrlValidator();
37  }