1 /*
2 * Copyright 2009-2013 smartics, Kronseder & Reiner GmbH
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package de.smartics.validation.constraints.impl;
17
18 import java.net.InetAddress;
19
20 import javax.validation.ConstraintValidator;
21 import javax.validation.ConstraintValidatorContext;
22
23 import de.smartics.validation.constraints.Available;
24
25 /**
26 * Checks that the annotated resource is availability.
27 */
28 public class InetAdressAvailabilityValidator implements
29 ConstraintValidator<Available, InetAddress>
30 {
31 // ******************************** Fields ********************************
32
33 // --- constants ----------------------------------------------------------
34
35 // --- members ------------------------------------------------------------
36
37 /**
38 * The connection timeout in milliseconds. A timeout of zero is interpreted as
39 * an infinite timeout.
40 */
41 private int timeoutInMs;
42
43 // ***************************** Initializer ******************************
44
45 // ***************************** Constructors *****************************
46
47 // ***************************** Inner Classes ****************************
48
49 // ******************************** Methods *******************************
50
51 // --- init ---------------------------------------------------------------
52
53 @Override
54 public void initialize(final Available constraintAnnotation)
55 {
56 timeoutInMs = constraintAnnotation.timeout();
57 }
58
59 // --- get&set ------------------------------------------------------------
60
61 // --- business -----------------------------------------------------------
62
63 @Override
64 public boolean isValid(final InetAddress value,
65 final ConstraintValidatorContext constraintValidatorContext)
66 {
67 try
68 {
69 final boolean valid = value.isReachable(timeoutInMs);
70 return valid;
71 }
72 catch (final Exception e)
73 {
74 return false;
75 }
76 }
77
78 // --- object basics ------------------------------------------------------
79
80 }