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Java > Open Source Codes > org > apache > ldap > server > db > Enumerator


1 /*
2  * Copyright 2004 The Apache Software Foundation
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  *
16  */
17 package org.apache.ldap.server.db;
18
19
20 import org.apache.ldap.common.filter.ExprNode;
21
22 import javax.naming.NamingEnumeration JavaDoc;
23 import javax.naming.NamingException JavaDoc;
24
25
26 /**
27  * An enumeration builder or factory for filter expressions.
28  *
29  * @author <a HREF="mailto:dev@directory.apache.org">Apache Directory Project</a>
30  * @version $Rev: 169198 $
31  */
32 public interface Enumerator
33 {
34     /**
35      * Creates an enumeration to enumerate through the set of candidates
36      * satisfying a filter expression.
37      *
38      * @param node a filter expression root
39      * @return an enumeration over the
40      * @throws NamingException if database access fails
41      */
42     NamingEnumeration JavaDoc enumerate( ExprNode node ) throws NamingException JavaDoc;
43 }
44
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