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18 package org.apache.hadoop.hbase.codec;
19
20 import java.io.IOException;
21 import java.io.InputStream;
22 import java.io.OutputStream;
23
24 import org.apache.commons.io.IOUtils;
25 import org.apache.hadoop.hbase.classification.InterfaceAudience;
26 import org.apache.hadoop.hbase.Cell;
27 import org.apache.hadoop.hbase.CellUtil;
28 import org.apache.hadoop.hbase.HBaseInterfaceAudience;
29 import org.apache.hadoop.hbase.util.Bytes;
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36 @InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG)
37 public class CellCodec implements Codec {
38 static class CellEncoder extends BaseEncoder {
39 CellEncoder(final OutputStream out) {
40 super(out);
41 }
42
43 @Override
44 public void write(Cell cell) throws IOException {
45 checkFlushed();
46
47 write(cell.getRowArray(), cell.getRowOffset(), cell.getRowLength());
48
49 write(cell.getFamilyArray(), cell.getFamilyOffset(), cell.getFamilyLength());
50
51 write(cell.getQualifierArray(), cell.getQualifierOffset(), cell.getQualifierLength());
52
53 this.out.write(Bytes.toBytes(cell.getTimestamp()));
54
55 this.out.write(cell.getTypeByte());
56
57 write(cell.getValueArray(), cell.getValueOffset(), cell.getValueLength());
58
59 this.out.write(Bytes.toBytes(cell.getMvccVersion()));
60 }
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68
69 private void write(final byte [] bytes, final int offset, final int length)
70 throws IOException {
71 this.out.write(Bytes.toBytes(length));
72 this.out.write(bytes, offset, length);
73 }
74 }
75
76 static class CellDecoder extends BaseDecoder {
77 public CellDecoder(final InputStream in) {
78 super(in);
79 }
80
81 @Override
82 protected Cell parseCell() throws IOException {
83 byte [] row = readByteArray(this.in);
84 byte [] family = readByteArray(in);
85 byte [] qualifier = readByteArray(in);
86 byte [] longArray = new byte[Bytes.SIZEOF_LONG];
87 IOUtils.readFully(this.in, longArray);
88 long timestamp = Bytes.toLong(longArray);
89 byte type = (byte) this.in.read();
90 byte[] value = readByteArray(in);
91
92 byte[] memstoreTSArray = new byte[Bytes.SIZEOF_LONG];
93 IOUtils.readFully(this.in, memstoreTSArray);
94 long memstoreTS = Bytes.toLong(memstoreTSArray);
95 return CellUtil.createCell(row, family, qualifier, timestamp, type, value, memstoreTS);
96 }
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102 private byte [] readByteArray(final InputStream in) throws IOException {
103 byte [] intArray = new byte[Bytes.SIZEOF_INT];
104 IOUtils.readFully(in, intArray);
105 int length = Bytes.toInt(intArray);
106 byte [] bytes = new byte [length];
107 IOUtils.readFully(in, bytes);
108 return bytes;
109 }
110 }
111
112 @Override
113 public Decoder getDecoder(InputStream is) {
114 return new CellDecoder(is);
115 }
116
117 @Override
118 public Encoder getEncoder(OutputStream os) {
119 return new CellEncoder(os);
120 }
121 }