blob: 5df9e260c159e35329641187c967bd4d4ca3442f (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.fs4;
import java.nio.ByteBuffer;
import java.util.Iterator;
/**
* Provides sequential access to each byte of a buffer
* as a hexadecimal string of length 2.
*
* @author tonytv
*/
public final class HexByteIterator implements Iterator<String> {
private final ByteBuffer buffer;
private String hexByte(byte b) {
final int unsignedValue = ((int)b) & 0xff;
String s = Integer.toHexString(unsignedValue).toUpperCase();
boolean singleChar = unsignedValue < 0x10;
if (singleChar)
return '0' + s;
else
return s;
}
public boolean hasNext() {
return buffer.hasRemaining();
}
public String next() {
return hexByte(buffer.get());
}
public void remove() {
throw new UnsupportedOperationException();
}
public HexByteIterator(ByteBuffer buffer) {
this.buffer = buffer.slice();
}
}
|