1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/samples/delegatingwriterfinal/src-test1.0/api/usage/CryptoWriter.java	Sat Jun 14 09:53:07 2008 +0200
     1.3 @@ -0,0 +1,60 @@
     1.4 +
     1.5 +package api.usage;
     1.6 +
     1.7 +import api.Writer;
     1.8 +import java.io.IOException;
     1.9 +
    1.10 +
    1.11 +/** Writer alters each char from 'A' to 'Z' range with next one just like
    1.12 + * old Romans did.
    1.13 + *
    1.14 + * @author Jaroslav Tulach
    1.15 + */
    1.16 +public class CryptoWriter implements Writer.Impl {
    1.17 +    private Writer out;
    1.18 +    
    1.19 +    private CryptoWriter(Writer out) {
    1.20 +        this.out = out;
    1.21 +    }
    1.22 +    
    1.23 +    
    1.24 +    public static Writer create(Writer out) {
    1.25 +        return Writer.create(new CryptoWriter(out));
    1.26 +    }
    1.27 +    
    1.28 +    @Override
    1.29 +    public void write(char[] cbuf, int off, int len) throws IOException {
    1.30 +        char[] arr = new char[len];
    1.31 +        for (int i = 0; i < len; i++) {
    1.32 +            arr[i] = convertChar(cbuf[off + i]);
    1.33 +        }
    1.34 +        out.write(arr, 0, len);
    1.35 +    }
    1.36 +
    1.37 +    @Override
    1.38 +    public void write(String str, int off, int len) throws IOException {
    1.39 +        StringBuffer sb = new StringBuffer();
    1.40 +        for (int i = 0; i < len; i++) {
    1.41 +            sb.append(convertChar(str.charAt(off + i)));
    1.42 +        }
    1.43 +        out.write(sb.toString(), 0, len);
    1.44 +    }
    1.45 +
    1.46 +    private char convertChar(int c) {
    1.47 +        if (c == 'Z') {
    1.48 +            return 'A';
    1.49 +        }
    1.50 +        if (c == 'z') {
    1.51 +            return 'a';
    1.52 +        }
    1.53 +        return (char)(c + 1);
    1.54 +    }
    1.55 +
    1.56 +    public void close() throws IOException {
    1.57 +        out.close();
    1.58 +    }
    1.59 +
    1.60 +    public void flush() throws IOException {
    1.61 +        out.flush();
    1.62 +    }
    1.63 +}