/*
* 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.aci.ProtectedItem;
import org.apache.directory.api.ldap.aci.protectedItem.MaxValueCountElem;
import org.apache.directory.api.ldap.aci.protectedItem.MaxValueCountItem;
import org.apache.directory.api.ldap.model.entry.Attribute;
import org.apache.directory.api.ldap.model.entry.Entry;
import org.apache.directory.api.ldap.model.exception.LdapException;
import org.apache.directory.api.ldap.model.schema.AttributeType;
/**
* An {@link ACITupleFilter} that discards all tuples that doesn't satisfy
* {@link org.apache.directory.api.ldap.aci.protectedItem.MaxValueCountItem} constraint if available. (18.8.3.3, X.501)
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
*/
public class MaxValueCountFilter implements ACITupleFilter
{
public Collection<ACITuple> filter( AciContext aciContext, OperationScope scope, Entry userEntry )
throws LdapException
{
if ( scope != OperationScope.ATTRIBUTE_TYPE_AND_VALUE )
{
return aciContext.getAciTuples();
}
if ( aciContext.getAciTuples().size() == 0 )
{
return aciContext.getAciTuples();
}
for ( Iterator<ACITuple> i = aciContext.getAciTuples().iterator(); i.hasNext(); )
{
ACITuple tuple = i.next();
if ( !tuple.isGrant() )
{
continue;
}
for ( Iterator<ProtectedItem> j = tuple.getProtectedItems().iterator(); j.hasNext(); )
{
ProtectedItem item = j.next();
if ( item instanceof MaxValueCountItem )
{
MaxValueCountItem mvc = ( MaxValueCountItem ) item;
if ( isRemovable( mvc, aciContext.getAttributeType(), aciContext.getEntryView() ) )
{
i.remove();
break;
}
}
}
}
return aciContext.getAciTuples();
}
private boolean isRemovable( MaxValueCountItem mvc, AttributeType attributeType, Entry entryView )
throws LdapException
{
for ( Iterator<MaxValueCountElem> k = mvc.iterator(); k.hasNext(); )
{
MaxValueCountElem mvcItem = k.next();
if ( attributeType.equals( mvcItem.getAttributeType() ) )
{
Attribute attr = entryView.get( attributeType );
int attrCount = attr == null ? 0 : attr.size();
if ( attrCount > mvcItem.getMaxCount() )
{
return true;
}
}
}
return false;
}
}