01: package org.odbms;
02:
03: /* Copyright 2002-2005 The Apache Software Foundation
04: *
05: * Licensed under the Apache License, Version 2.0 (the "License");
06: * you may not use this file except in compliance with the License.
07: * 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: /**
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: * returns <code>true</code> if the <code>ObjectSet</code> has more elements.
27: * @return boolean <code>true</code> if the <code>ObjectSet</code> has more
28: * elements.
29: */
30: public boolean hasNext();
31:
32: /**
33: * returns the next object in the <code>ObjectSet</code>.
34: * @return the next object in the <code>ObjectSet</code>.
35: */
36: public Object next();
37:
38: /**
39: * resets the <code>ObjectSet</code> cursor before the first element. <br><br>
40: * A subsequent call to <code>next()</code> will return the first element.
41: */
42: public void reset();
43:
44: /**
45: * returns the number of elements in the <code>ObjectSet</code>.
46: * @return the number of elements in the <code>ObjectSet</code>.
47: */
48: public int size();
49: }
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