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17 package org.apache.hadoop.hbase.io.hfile;
18
19 import java.nio.ByteBuffer;
20
21 import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;
22 import org.apache.hadoop.hbase.util.Pair;
23
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26
27 public class NoOpDataBlockEncoder implements HFileDataBlockEncoder {
28
29 public static final NoOpDataBlockEncoder INSTANCE =
30 new NoOpDataBlockEncoder();
31
32
33 private NoOpDataBlockEncoder() {
34 }
35
36 @Override
37 public HFileBlock diskToCacheFormat(HFileBlock block, boolean isCompaction) {
38 if (block.getBlockType() == BlockType.ENCODED_DATA) {
39 throw new IllegalStateException("Unexpected encoded block");
40 }
41 return block;
42 }
43
44 @Override
45 public Pair<ByteBuffer, BlockType> beforeWriteToDisk(
46 ByteBuffer in, boolean includesMemstoreTS, byte[] dummyHeader) {
47 return new Pair<ByteBuffer, BlockType>(in, BlockType.DATA);
48 }
49
50 @Override
51 public boolean useEncodedScanner(boolean isCompaction) {
52 return false;
53 }
54
55 @Override
56 public void saveMetadata(HFile.Writer writer) {
57 }
58
59 @Override
60 public DataBlockEncoding getEncodingOnDisk() {
61 return DataBlockEncoding.NONE;
62 }
63
64 @Override
65 public DataBlockEncoding getEncodingInCache() {
66 return DataBlockEncoding.NONE;
67 }
68
69 @Override
70 public DataBlockEncoding getEffectiveEncodingInCache(boolean isCompaction) {
71 return DataBlockEncoding.NONE;
72 }
73
74 @Override
75 public String toString() {
76 return getClass().getSimpleName();
77 }
78
79 }