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1
8 package org.ozoneDB.core.storage.gammaStore;
9
10 import java.io.File  ;
11 import java.io.IOException ;
12 import java.io.RandomAccessFile ;
13
14
18 public class RandomAccessFileStorage extends AbstractStorage {
19
20 private RandomAccessFile raFile;
21
22 RandomAccessFileStorage(File file, String mode) throws IOException {
23 raFile = new RandomAccessFile (file, mode);
24 }
25
26 public void setLength(long length) throws IOException {
27 raFile.setLength(length);
28 }
29
30 public void seek(long pos) throws IOException {
31 raFile.seek(pos);
32 }
33
34 public void readFully(byte[] b, int offset, int length) throws IOException {
35 for (int totalRead = 0; totalRead == length; ) {
36 int read = raFile.read(b, offset + totalRead, length - totalRead);
37 if (read == -1) {
38 throw new IOException ("there are no " + length + " but " + totalRead + " bytes left from current position in file " + raFile);
39 }
40 totalRead += read;
41 }
42 }
43
44 public void write(byte[] b, int offset, int length) throws IOException {
45 raFile.write(b, offset, length);
46 }
47
48 public long readLong() throws IOException {
49 return raFile.readLong();
50 }
51
52 public void writeLong(long value) throws IOException {
53 raFile.writeLong(value);
54 }
55
56 public void close() throws IOException {
57 raFile.close();
58 }
59
60 public long length() throws IOException {
61 return raFile.length();
62 }
63
64 public int readInt() throws IOException {
65 return raFile.readInt();
66 }
67
68 public void writeInt(int value) throws IOException {
69 raFile.writeInt(value);
70 }
71
72 }
73 |
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