| /* |
| * 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.Collection; |
| import java.util.Iterator; |
| |
| import org.apache.directory.api.ldap.aci.ACITuple; |
| import org.apache.directory.api.ldap.model.entry.Entry; |
| import org.apache.directory.api.ldap.model.exception.LdapException; |
| |
| |
| /** |
| * An {@link ACITupleFilter} that discards all tuples having a precedence less |
| * than the highest remaining precedence. (18.8.4.1, X.501) |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class HighestPrecedenceFilter implements ACITupleFilter |
| { |
| public Collection<ACITuple> filter( AciContext aciContext, OperationScope scope, Entry userEntry ) |
| throws LdapException |
| { |
| ACI_LOG.debug( "Filtering HighestPrecedence..." ); |
| |
| if ( aciContext.getAciTuples().size() <= 1 ) |
| { |
| ACI_LOG.debug( "HighestPrecedence : nothing to do" ); |
| return aciContext.getAciTuples(); |
| } |
| |
| int maxPrecedence = -1; |
| |
| // Find the maximum precedence for all tuples. |
| for ( ACITuple tuple : aciContext.getAciTuples() ) |
| { |
| if ( ( tuple.getPrecedence() != null ) && ( tuple.getPrecedence() > maxPrecedence ) ) |
| { |
| maxPrecedence = tuple.getPrecedence(); |
| } |
| } |
| |
| // Remove all tuples whose precedences are not the maximum one. |
| for ( Iterator<ACITuple> i = aciContext.getAciTuples().iterator(); i.hasNext(); ) |
| { |
| ACITuple tuple = i.next(); |
| |
| if ( ( tuple.getPrecedence() != null ) && ( tuple.getPrecedence() != maxPrecedence ) ) |
| { |
| i.remove(); |
| } |
| } |
| |
| return aciContext.getAciTuples(); |
| } |
| } |