01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17:
18: package javax.naming;
19:
20: import java.util.Enumeration;
21: import javax.naming.NamingException;
22:
23: /**
24: * A <code>NamingEnumeration</code> interface is an <code>Enumeration</code>
25: * which has been extended to support <code>NamingException</code>s. They can
26: * be thrown when getting the next element, checking if the Enumeration has more
27: * elements or on closing the <code>Enumeration</code>.
28: */
29: public interface NamingEnumeration<T> extends Enumeration<T> {
30:
31: /**
32: * Get the next element.
33: *
34: * @return the next element - can be null.
35: * @exception NamingException
36: * if a naming error occurs
37: * @exception java.util.NoSuchElementException
38: * when no more elements exist.
39: */
40: public T next() throws NamingException;
41:
42: /**
43: * Check for more elements.
44: *
45: * @return if more elements exist return true else return false.
46: * @exception NamingException
47: * if a naming error occurs
48: */
49: public boolean hasMore() throws NamingException;
50:
51: /**
52: * Close the enumeration.
53: *
54: * @exception NamingException
55: * if a naming error occurs
56: */
57: public void close() throws NamingException;
58:
59: }
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