01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://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: package org.apache.wicket.validation.validator;
18:
19: import java.util.regex.Pattern;
20:
21: /**
22: * Validator for checking the form/pattern of email addresses.
23: *
24: * @author Chris Turner
25: * @author Jonathan Locke
26: * @author Martijn Dashorst
27: * @author Al Maw
28: *
29: * @since 1.3
30: */
31: public class EmailAddressValidator extends PatternValidator {
32: private static final long serialVersionUID = 1L;
33:
34: /** Singleton instance */
35: private static final EmailAddressValidator INSTANCE = new EmailAddressValidator();
36:
37: /**
38: * @return Instance of emailadress validator
39: */
40: public static EmailAddressValidator getInstance() {
41: return INSTANCE;
42: }
43:
44: /**
45: * Protected constructor to force use of static singleton accessor method.
46: * Or override it to implement resourceKey(Component)
47: */
48: protected EmailAddressValidator() {
49: super (
50: "^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*((\\.[A-Za-z]{2,}){1}$)",
51: Pattern.CASE_INSENSITIVE);
52: }
53: }
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