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Java > Open Source Codes > org > odbms > ObjectSet


1 package org.odbms;
2
3 /* Copyright 2002-2005 The Apache Software Foundation
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  * 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 /**
19  * query resultset.
20  * <br><br>The <code>ObjectSet</code> interface providedes iterator functions to
21  * navigate through a set of objects retrieved by a query.
22  */
23 public interface ObjectSet {
24
25
26     /**
27      * returns <code>true</code> if the <code>ObjectSet</code> has more elements.
28      * @return boolean <code>true</code> if the <code>ObjectSet</code> has more
29      * elements.
30      */
31     public boolean hasNext ();
32
33
34     /**
35      * returns the next object in the <code>ObjectSet</code>.
36      * @return the next object in the <code>ObjectSet</code>.
37      */
38     public Object JavaDoc next ();
39
40
41     /**
42      * resets the <code>ObjectSet</code> cursor before the first element. <br><br>
43      * A subsequent call to <code>next()</code> will return the first element.
44      */
45     public void reset ();
46
47
48
49     /**
50      * returns the number of elements in the <code>ObjectSet</code>.
51      * @return the number of elements in the <code>ObjectSet</code>.
52      */
53     public int size ();
54 }
55
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