1 /*
2 * Copyright 2008 the original author or authors.
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
17 package org.springframework.ws.soap.security.callback;
18
19 import java.io.IOException;
20 import javax.security.auth.callback.Callback;
21 import javax.security.auth.callback.CallbackHandler;
22 import javax.security.auth.callback.UnsupportedCallbackException;
23
24 /**
25 * Represents a chain of <code>CallbackHandler</code>s. For each callback, each of the handlers is called in term. If a
26 * handler throws a <code>UnsupportedCallbackException</code>, the next handler is tried.
27 *
28 * @author Arjen Poutsma
29 * @since 1.5.0
30 */
31 public class CallbackHandlerChain extends AbstractCallbackHandler {
32
33 private final CallbackHandler[] callbackHandlers;
34
35 public CallbackHandlerChain(CallbackHandler[] callbackHandlers) {
36 this.callbackHandlers = callbackHandlers;
37 }
38
39 public CallbackHandler[] getCallbackHandlers() {
40 return callbackHandlers;
41 }
42
43 protected void handleInternal(Callback callback) throws IOException, UnsupportedCallbackException {
44 boolean allUnsupported = true;
45 for (int i = 0; i < callbackHandlers.length; i++) {
46 CallbackHandler callbackHandler = callbackHandlers[i];
47 try {
48 callbackHandler.handle(new Callback[]{callback});
49 allUnsupported = false;
50 }
51 catch (UnsupportedCallbackException ex) {
52 // if an UnsupportedCallbackException occurs, go to the next handler
53 }
54 }
55 if (allUnsupported) {
56 throw new UnsupportedCallbackException(callback);
57 }
58 }
59 }