|
1 package org.archive.io;
2
3 import java.io.IOException  ;
4
5 public class SeekReaderCharSequence implements CharSequence {
6
7
8 final private SeekReader reader;
9 final private int size;
10
11
12 public SeekReaderCharSequence(SeekReader reader, int size) {
13 this.reader = reader;
14 this.size = size;
15 }
16
17
18 public int length() {
19 return size;
20 }
21
22
23 public char charAt(int index) {
24 if ((index < 0) || (index >= length())) {
25 throw new IndexOutOfBoundsException (Integer.toString(index));
26 }
27 try {
28 reader.position(index);
29 int r = reader.read();
30 if (r < 0) {
31 throw new IllegalStateException ("EOF");
32 }
33 return (char)reader.read();
34 } catch (IOException e) {
35 throw new RuntimeException (e);
36 }
37 }
38
39
40 public CharSequence subSequence(int start, int end) {
41 return new CharSubSequence(this, start, end);
42 }
43
44 public String toString() {
45 StringBuilder sb = new StringBuilder ();
46 try {
47 reader.position(0);
48 for (int ch = reader.read(); ch >= 0; ch = reader.read()) {
49 sb.append((char)ch);
50 }
51 return sb.toString();
52 } catch (IOException e) {
53 throw new IllegalStateException (e);
54 }
55 }
56 }
57 |
Popular Tags |
Java API By Example, From Geeks To Geeks.