/*
* 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.RestrictedByElem;
import org.apache.directory.api.ldap.aci.protectedItem.RestrictedByItem;
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.entry.Value;
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.RestrictedByItem} constraint if available. (18.8.3.3, X.501)
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
*/
public class RestrictedByFilter 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> ii = aciContext.getAciTuples().iterator(); ii.hasNext(); )
{
ACITuple tuple = ii.next();
if ( !tuple.isGrant() )
{
continue;
}
if ( isRemovable( tuple, aciContext.getAttributeType(), aciContext.getAttrValue(), aciContext.getEntry() ) )
{
ii.remove();
}
}
return aciContext.getAciTuples();
}
public boolean isRemovable( ACITuple tuple, AttributeType attributeType, Value<?> attrValue, Entry entry )
throws LdapException
{
for ( ProtectedItem item : tuple.getProtectedItems() )
{
if ( item instanceof RestrictedByItem )
{
RestrictedByItem rb = ( RestrictedByItem ) item;
for ( Iterator<RestrictedByElem> k = rb.iterator(); k.hasNext(); )
{
RestrictedByElem rbItem = k.next();
// TODO Fix DIRSEVER-832
if ( attributeType.equals( rbItem.getAttributeType() ) )
{
Attribute attr = entry.get( rbItem.getValuesIn() );
// TODO Fix DIRSEVER-832
if ( ( attr == null ) || !attr.contains( attrValue ) )
{
return true;
}
}
}
}
}
return false;
}
}