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Java > Open Source Codes > org > apache > derby > iapi > services > io > TypedFormat


1 /*
2
3    Derby - Class org.apache.derby.iapi.services.io.TypedFormat
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.services.io;
23 /**
24   Cloudscape interface for identifying the format id for the
25   stored form of an object. Objects of different classes may
26   have the same format id if:
27
28   <UL>
29   <LI> The objects read and write the same stored forms.
30   <LI> The object's getTypeId() method returns the same
31   identifier.
32   <LI> The objects support all the interfaces the type
33   implies.
34   </UL>
35   */
36 public interface TypedFormat
37 {
38     /**
39       Get a universally unique identifier for the type of
40       this object.
41
42       @return The identifier. (A UUID stuffed in an array
43       of 16 bytes).
44      */
45     int getTypeFormatId();
46 }
47
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