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