/*
* Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.security.acls.domain;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.springframework.security.access.hierarchicalroles.NullRoleHierarchy;
import org.springframework.security.access.hierarchicalroles.RoleHierarchy;
import org.springframework.security.acls.model.Sid;
import org.springframework.security.acls.model.SidRetrievalStrategy;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.util.Assert;
/**
* Basic implementation of {@link SidRetrievalStrategy} that creates a {@link Sid} for the
* principal, as well as every granted authority the principal holds. Can optionally have
* a <tt>RoleHierarchy</tt> injected in order to determine the extended list of
* authorities that the principal is assigned.
* <p>
* The returned array will always contain the {@link PrincipalSid} before any
* {@link GrantedAuthoritySid} elements.
*
* @author Ben Alex
*/
public class SidRetrievalStrategyImpl implements SidRetrievalStrategy {
private RoleHierarchy roleHierarchy = new NullRoleHierarchy();
public SidRetrievalStrategyImpl() {
}
public SidRetrievalStrategyImpl(RoleHierarchy roleHierarchy) {
Assert.notNull(roleHierarchy, "RoleHierarchy must not be null");
this.roleHierarchy = roleHierarchy;
}
// ~ Methods
// ========================================================================================================
public List<Sid> getSids(Authentication authentication) {
Collection<? extends GrantedAuthority> authorities = roleHierarchy
.getReachableGrantedAuthorities(authentication.getAuthorities());
List<Sid> sids = new ArrayList<Sid>(authorities.size() + 1);
sids.add(new PrincipalSid(authentication));
for (GrantedAuthority authority : authorities) {
sids.add(new GrantedAuthoritySid(authority));
}
return sids;
}
}