1 /*
2 * Copyright [2007] [University Corporation for Advanced Internet Development, Inc.]
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.opensaml.xml.security.credential;
18
19 import org.opensaml.xml.security.CriteriaSet;
20 import org.opensaml.xml.security.SecurityException;
21
22 /**
23 * Abstract base class for {@link CredentialResolver} implementations.
24 */
25 public abstract class AbstractCredentialResolver implements CredentialResolver {
26
27 /** {@inheritDoc} */
28 public Credential resolveSingle(CriteriaSet criteriaSet) throws SecurityException {
29 Iterable<Credential> creds = resolve(criteriaSet);
30 if (creds.iterator().hasNext()) {
31 return creds.iterator().next();
32 } else {
33 return null;
34 }
35 }
36
37 /** {@inheritDoc} */
38 public abstract Iterable<Credential> resolve(CriteriaSet criteriaSet) throws SecurityException;
39
40 }