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Java > Open Source Codes > org > objectweb > medor > eval > prefetch > api > IntermediaryPrefetchBuffer


1 /**
2  * Speedo: an implementation of JDO compliant personality on top of JORM generic
3  * I/O sub-system.
4  * Copyright (C) 2001-2004 France Telecom R&D
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  *
20  *
21  *
22  * Contact: speedo@objectweb.org
23  *
24  */
25
26 package org.objectweb.medor.eval.prefetch.api;
27
28 /**
29  * It acts as an intermediary prefetch buffer.
30  * It has a delegate prefetch buffer
31  * and a translation table between the Tuple of the delegate prefetch buffer
32  * and its own Tuple.
33  * @author Y.Bersihand
34  */
35 public interface IntermediaryPrefetchBuffer extends PrefetchBuffer {
36     
37     /**
38      * Sets the delegate prefetch buffer
39      */
40     void setDelegatePrefetchBuffer(PrefetchBuffer pb);
41     
42     /**
43      * Gets the delegate prefetch buffer
44      * @return
45      */
46     PrefetchBuffer getDelegatePrefetchBuffer();
47     
48     /**
49      * Sets the association table between the tuple of the delegate prefetch buffer
50      * and its tuple.
51      * Example: Tuple of the delegate pb : [f1, f2, f3, f4]
52      * association table : [0,3] because to build its tuple,
53      * only the fields f1 and f4 are needed.
54      * @param indexes
55      */
56     void setAssociationTable(int[] indexes);
57     
58     /**
59      * Gets the association table.
60      */
61     int[] getAssociationTable();
62     
63 }
64
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