/*
* Copyright 2004 The Apache Software Foundation
*
* Licensed 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.ldap.server.event;
import javax.naming.NamingException;
import javax.naming.Name;
import javax.naming.directory.SearchControls;
import javax.naming.directory.Attributes;
import org.apache.ldap.common.filter.ExprNode;
import org.apache.ldap.common.filter.ScopeNode;
import org.apache.ldap.common.name.DnParser;
/**
* Evaluates ScopeNode assertions on candidates using a database.
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
* @version $Rev$
*/
public class ScopeEvaluator implements Evaluator
{
private DnParser parser = null;
public ScopeEvaluator() throws NamingException
{
parser = new DnParser();
}
/**
* @see Evaluator#evaluate(ExprNode, String, Attributes)
*/
public boolean evaluate( ExprNode node, String dn, Attributes record )
throws NamingException
{
ScopeNode snode = ( ScopeNode ) node;
switch( snode.getScope() )
{
case( SearchControls.OBJECT_SCOPE ):
return dn.equals( snode.getBaseDn() );
case( SearchControls.ONELEVEL_SCOPE ):
if ( dn.endsWith( snode.getBaseDn() ) )
{
Name candidateDn = parser.parse( dn );
Name scopeDn = parser.parse( snode.getBaseDn() );
return ( scopeDn.size() + 1 ) == candidateDn.size();
}
case( SearchControls.SUBTREE_SCOPE ):
return dn.endsWith( snode.getBaseDn() );
default:
throw new NamingException( "Unrecognized search scope!" );
}
}
}