/*
* 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.jndi;
import java.util.NoSuchElementException;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.SearchResult;
import org.apache.directory.server.core.entry.ClonedServerEntry;
import org.apache.directory.server.core.entry.ServerEntryUtils;
import org.apache.directory.server.core.filtering.EntryFilteringCursor;
import org.apache.directory.shared.ldap.jndi.JndiUtils;
/**
* Adapts a Cursor over entries into a NamingEnumeration.
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
* @version $Rev$, $Date$
*/
public class NamingEnumerationAdapter implements NamingEnumeration<SearchResult>
{
private final EntryFilteringCursor cursor;
private boolean available = false;
public NamingEnumerationAdapter( EntryFilteringCursor cursor ) throws NamingException
{
this.cursor = cursor;
try
{
if ( ! cursor.first() )
{
cursor.close();
available = false;
}
else
{
available = true;
}
}
catch ( Exception e )
{
JndiUtils.wrap( e );
}
}
/*
* @see NamingEnumeration#close()
*/
public void close() throws NamingException
{
try
{
cursor.close();
available = false;
}
catch ( Exception e )
{
JndiUtils.wrap( e );
}
}
/*
* @see NamingEnumeration#hasMore()
*/
public boolean hasMore() throws NamingException
{
return available;
}
/*
* @see NamingEnumeration#next()
*/
public SearchResult next() throws NamingException
{
ClonedServerEntry entry = null;
try
{
entry = cursor.get();
if ( cursor.next() )
{
available = true;
}
else
{
available = false;
cursor.close();
}
}
catch ( Exception e )
{
JndiUtils.wrap( e );
}
SearchResult result = new SearchResult( entry.getDn().getName(), null,
ServerEntryUtils.toBasicAttributes( entry ) );
result.setRelative( false );
return result;
}
/*
* @see Enumeration#hasMoreElements()
*/
public boolean hasMoreElements()
{
return available;
}
/*
* @see Enumeration#nextElement()
*/
public SearchResult nextElement()
{
try
{
return next();
}
catch ( NamingException e )
{
throw new NoSuchElementException( e.getLocalizedMessage() );
}
}
}