01: /*
02:
03: Derby - Class org.apache.derby.iapi.services.io.TypedFormat
04:
05: Licensed to the Apache Software Foundation (ASF) under one or more
06: contributor license agreements. See the NOTICE file distributed with
07: this work for additional information regarding copyright ownership.
08: The ASF licenses this file to you under the Apache License, Version 2.0
09: (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: /**
25: Cloudscape interface for identifying the format id for the
26: stored form of an object. Objects of different classes may
27: have the same format id if:
28:
29: <UL>
30: <LI> The objects read and write the same stored forms.
31: <LI> The object's getTypeId() method returns the same
32: identifier.
33: <LI> The objects support all the interfaces the type
34: implies.
35: </UL>
36: */
37: public interface TypedFormat {
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: }
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