1 /**
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package org.apache.hadoop.hbase.codec;
19
20 import java.io.IOException;
21 import java.io.OutputStream;
22
23 import org.apache.hadoop.hbase.Cell;
24
25 public abstract class BaseEncoder implements Codec.Encoder {
26 protected final OutputStream out;
27 // This encoder is 'done' once flush has been called.
28 protected boolean flushed = false;
29
30 public BaseEncoder(final OutputStream out) {
31 this.out = out;
32 }
33
34 @Override
35 public abstract void write(Cell cell) throws IOException;
36
37 protected void checkFlushed() throws CodecException {
38 if (this.flushed) throw new CodecException("Flushed; done");
39 }
40
41 @Override
42 public void flush() throws IOException {
43 if (this.flushed) return;
44 this.flushed = true;
45 try {
46 this.out.flush();
47 } catch (IOException e) {
48 throw new CodecException(e);
49 }
50 }
51 }