2 * Copyright 2005-2010 the original author or authors.
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
16 package org.wamblee.security.authorization;
18 import java.util.ArrayList;
19 import java.util.List;
21 import javax.persistence.CascadeType;
22 import javax.persistence.DiscriminatorValue;
23 import javax.persistence.Entity;
24 import javax.persistence.ManyToMany;
25 import javax.persistence.OneToMany;
26 import javax.persistence.OrderColumn;
27 import javax.persistence.Transient;
29 import org.wamblee.security.authentication.User;
30 import org.wamblee.security.authentication.UserAccessor;
33 * Default implementation of an authorization service. To determine whether
34 * access to a resource is allowed, the service consults a number of
35 * authorization rules in a fixed order. The first rule that gives a result
36 * GRANTED or DENIED determines the result of the evaluation. Rules that return
37 * any other result are ignoed. If none of the rules match, than access is
40 * @author Erik Brakkee
43 @DiscriminatorValue("DEFAULT")
44 public class DefaultAuthorizationService extends AbstractAuthorizationService {
48 * List of ordered authorization rules.
50 @OneToMany(cascade = CascadeType.ALL, orphanRemoval = true, targetEntity = AbstractAuthorizationRule.class)
51 @OrderColumn(name = "RULE_INDEX")
52 private List<AuthorizationRule> rules;
55 * User accessor used to obtain the current user.
58 private UserAccessor userAccessor;
61 * Constructs the service.
66 * Name of this instance of the service.
68 public DefaultAuthorizationService(UserAccessor aAccessor, String aName) {
70 rules = new ArrayList<AuthorizationRule>();
71 userAccessor = aAccessor;
75 * Constructs the authorization service.
77 public DefaultAuthorizationService() {
78 rules = new ArrayList<AuthorizationRule>();
83 * Sets the user accessor.
85 * @param aUserAccessor
89 public void setUserAccessor(UserAccessor aUserAccessor) {
90 userAccessor = aUserAccessor;
97 * org.wamblee.security.authorization.AuthorizationService#isAllowed(java
98 * .lang.Object, org.wamblee.security.authorization.Operation)
100 public boolean isAllowed(Object aResource, Operation aOperation) {
101 User user = userAccessor.getCurrentUser();
103 for (AuthorizationRule rule : rules) {
104 switch (rule.isAllowed(aResource, aOperation, user)) {
119 * @see org.wamblee.security.authorization.AuthorizationService#check(T,
120 * org.wamblee.security.authorization.Operation)
122 public <T> T check(T aResource, Operation aOperation) {
123 if (!isAllowed(aResource, aOperation)) {
124 throw new AuthorizationException(aResource, aOperation);
133 * @see org.wamblee.security.authorization.AuthorizationService#getRules()
135 public AuthorizationRule[] getRules() {
136 return rules.toArray(new AbstractAuthorizationRule[0]);
143 * org.wamblee.security.authorization.AuthorizationService#appendRule(org
144 * .wamblee.security.authorization.AuthorizationRule)
146 public void appendRule(AuthorizationRule aRule) {
154 * org.wamblee.security.authorization.AuthorizationService#insertRuleAfter
155 * (int, org.wamblee.security.authorization.AuthorizationRule)
157 public void insertRuleAfter(int aIndex, AuthorizationRule aRule) {
158 rules.add(aIndex, aRule);
165 * org.wamblee.security.authorization.AuthorizationService#removeRule(int)
167 public void removeRule(int aIndex) {
168 rules.remove(aIndex);
176 protected List<AuthorizationRule> getMappedRules() {
186 protected void setMappedRules(List<AuthorizationRule> aRules) {