1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/samples/delegatingwriterfinal/src-api2.0/api/CharSeq.java	Sat Jun 14 09:53:06 2008 +0200
     1.3 @@ -0,0 +1,56 @@
     1.4 +package api;
     1.5 +
     1.6 +/**
     1.7 + *
     1.8 + * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
     1.9 + */
    1.10 +final class CharSeq implements CharSequence {
    1.11 +    final char[] arr;
    1.12 +    final int off;
    1.13 +    final int len;
    1.14 +    final int c;
    1.15 +    
    1.16 +    public CharSeq(int c) {
    1.17 +        this.arr = null;
    1.18 +        this.off = 0;
    1.19 +        this.len = 1;
    1.20 +        this.c = c;
    1.21 +    }
    1.22 +
    1.23 +    public CharSeq(char[] arr, int off, int len) {
    1.24 +        this.arr = arr;
    1.25 +        this.off = off;
    1.26 +        this.len = len;
    1.27 +        this.c = -1;
    1.28 +    }
    1.29 +
    1.30 +    public int length() {
    1.31 +        return arr == null ? 1 : len;
    1.32 +    }
    1.33 +
    1.34 +    public char charAt(int index) {
    1.35 +        if (index < 0) {
    1.36 +            throw new IndexOutOfBoundsException();
    1.37 +        }
    1.38 +        if (arr == null) {
    1.39 +            if (index > 0) {
    1.40 +                throw new IndexOutOfBoundsException();
    1.41 +            }
    1.42 +            return (char)c;
    1.43 +        } else {
    1.44 +            if (index >= len) {
    1.45 +                throw new IndexOutOfBoundsException();
    1.46 +            }
    1.47 +            return arr[off + index];
    1.48 +        }
    1.49 +    }
    1.50 +
    1.51 +    public CharSequence subSequence(int start, int end) {
    1.52 +        if (end >= this.len) {
    1.53 +            throw new IndexOutOfBoundsException();
    1.54 +        }
    1.55 +        char[] array = arr == null ? new char[]{ (char)c } : arr;
    1.56 +        return new CharSeq(array, off + start, off + end);
    1.57 +    }
    1.58 +
    1.59 +}