01: /*
02:
03: Derby - Class org.apache.derby.iapi.types.Resetable
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.types;
23:
24: import org.apache.derby.iapi.error.StandardException;
25: import java.io.IOException;
26:
27: /**
28: * This is a simple interface that is used by
29: * streams that can initialize and reset themselves.
30: * The purpose is for the implementation of BLOB/CLOB.
31: * It defines a methods that can be used to initialize and reset a stream.
32: */
33: public interface Resetable {
34: /**
35: * Reset the stream to the beginning.
36: */
37: public void resetStream() throws IOException, StandardException;
38:
39: /**
40: * Initialize. Needs to be called first, before a resetable stream can
41: * be used.
42: *
43: */
44: public void initStream() throws StandardException;
45:
46: /**
47: * Close. Free resources (such as open containers and locks) associated
48: * with the stream.
49: */
50: public void closeStream();
51:
52: }
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