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Java > Open Source Codes > org > apache > derby > iapi > store > access > SpaceInfo


1 /*
2
3    Derby - Class org.apache.derby.iapi.store.access.SpaceInfo
4
5    Licensed to the Apache Software Foundation (ASF) under one or more
6    contributor license agreements. See the NOTICE file distributed with
7    this work for additional information regarding copyright ownership.
8    The ASF licenses this file to you under the Apache License, Version 2.0
9    (the "License"); you may not use this file except in compliance with
10    the License. You may obtain a copy of the License at
11
12       http://www.apache.org/licenses/LICENSE-2.0
13
14    Unless required by applicable law or agreed to in writing, software
15    distributed under the License is distributed on an "AS IS" BASIS,
16    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17    See the License for the specific language governing permissions and
18    limitations under the License.
19
20  */
21
22 package org.apache.derby.iapi.store.access;
23
24 /**
25
26 Manage the result information from a single call to
27 ConglomerateController.getSpaceInfo().
28 <p>
29 @see org.apache.derby.iapi.store.access.ConglomerateController
30
31 **/
32
33 public interface SpaceInfo
34 {
35     /**
36      * Get the estimated number of allocated pages
37      **/
38     public long getNumAllocatedPages();
39
40     /**
41      * Get the estimated number of free pages
42      **/
43     public long getNumFreePages();
44
45     /**
46      * Get the estimated number of unfilled pages
47      **/
48     public long getNumUnfilledPages();
49
50     /**
51      * Get the page size
52      **/
53     public int getPageSize();
54
55 }
56
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