/*
* 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 javax.naming.NamingException;
import org.apache.directory.server.core.entry.ServerEntry;
import org.apache.directory.server.core.interceptor.context.OperationContext;
import org.apache.directory.shared.ldap.aci.ACITuple;
import org.apache.directory.shared.ldap.aci.MicroOperation;
import org.apache.directory.shared.ldap.constants.AuthenticationLevel;
import org.apache.directory.shared.ldap.entry.Value;
import org.apache.directory.shared.ldap.name.DN;
import org.apache.directory.shared.ldap.schema.SchemaManager;
/**
* 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>
* @version $Rev: 918766 $, $Date: 2010-03-04 00:25:11 +0100 (Jeu, 04 mar 2010) $
*/
public class HighestPrecedenceFilter implements ACITupleFilter
{
public Collection<ACITuple> filter(
SchemaManager schemaManager,
Collection<ACITuple> tuples,
OperationScope scope,
OperationContext opContext,
Collection<DN> userGroupNames,
DN userName,
ServerEntry userEntry,
AuthenticationLevel authenticationLevel,
DN entryName,
String attrId,
Value<?> attrValue,
ServerEntry entry,
Collection<MicroOperation> microOperations,
ServerEntry entryView )
throws NamingException
{
if ( tuples.size() <= 1 )
{
return tuples;
}
int maxPrecedence = -1;
// Find the maximum precedence for all tuples.
for ( ACITuple tuple:tuples )
{
if ( tuple.getPrecedence() > maxPrecedence )
{
maxPrecedence = tuple.getPrecedence();
}
}
// Remove all tuples whose precedences are not the maximum one.
for ( Iterator<ACITuple> i = tuples.iterator(); i.hasNext(); )
{
ACITuple tuple = i.next();
if ( tuple.getPrecedence() != maxPrecedence )
{
i.remove();
}
}
return tuples;
}
}