| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.directory.server.core.authz.support; |
| |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| |
| import org.apache.directory.api.ldap.aci.ACITuple; |
| import org.apache.directory.api.ldap.aci.UserClass; |
| import org.apache.directory.api.ldap.model.entry.Entry; |
| import org.apache.directory.api.ldap.model.exception.LdapException; |
| |
| |
| /** |
| * An {@link ACITupleFilter} that chooses the tuples with the most specific user |
| * class. (18.8.4.2) |
| * <p> |
| * If more than one tuple remains, choose the tuples with the most specific user |
| * class. If there are any tuples matching the requestor with UserClasses element |
| * name or thisEntry, discard all other tuples. Otherwise if there are any tuples |
| * matching UserGroup, discard all other tuples. Otherwise if there are any tuples |
| * matching subtree, discard all other tuples. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class MostSpecificUserClassFilter implements ACITupleFilter |
| { |
| public Collection<ACITuple> filter( AciContext aciContext, OperationScope scope, Entry userEntry ) |
| throws LdapException |
| { |
| if ( aciContext.getAciTuples().size() <= 1 ) |
| { |
| return aciContext.getAciTuples(); |
| } |
| |
| Collection<ACITuple> filteredTuples = new ArrayList<ACITuple>(); |
| |
| // If there are any tuples matching the requestor with UserClasses |
| // element name or thisEntry, discard all other tuples. |
| for ( ACITuple tuple : aciContext.getAciTuples() ) |
| { |
| for ( UserClass userClass : tuple.getUserClasses() ) |
| { |
| if ( userClass instanceof UserClass.Name || userClass instanceof UserClass.ThisEntry ) |
| { |
| filteredTuples.add( tuple ); |
| break; |
| } |
| } |
| } |
| |
| if ( filteredTuples.size() > 0 ) |
| { |
| return filteredTuples; |
| } |
| |
| // Otherwise if there are any tuples matching UserGroup, |
| // discard all other tuples. |
| for ( ACITuple tuple : aciContext.getAciTuples() ) |
| { |
| for ( UserClass userClass : tuple.getUserClasses() ) |
| { |
| if ( userClass instanceof UserClass.UserGroup ) |
| { |
| filteredTuples.add( tuple ); |
| break; |
| } |
| } |
| } |
| |
| if ( filteredTuples.size() > 0 ) |
| { |
| return filteredTuples; |
| } |
| |
| // Otherwise if there are any tuples matching subtree, |
| // discard all other tuples. |
| for ( ACITuple tuple : aciContext.getAciTuples() ) |
| { |
| for ( UserClass userClass : tuple.getUserClasses() ) |
| { |
| if ( userClass instanceof UserClass.Subtree ) |
| { |
| filteredTuples.add( tuple ); |
| break; |
| } |
| } |
| } |
| |
| if ( filteredTuples.size() > 0 ) |
| { |
| return filteredTuples; |
| } |
| |
| return aciContext.getAciTuples(); |
| } |
| |
| } |