hg/apidesign: samples/delegatingwriterfinal/src-api1.0/api/Writer.java@b5cbb797ec0a

     1 package api;

     3 import java.io.IOException;

     5 /** Fixing the problem caused by mixing subclassing and delegation in

     6  * the <code>java.io.BufferedWriter</code>

     7  *

     8  * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>

     9  */

    10 // BEGIN: writer.final.1.0

    11 public final class Writer {

    12     private final Impl impl;

    14     private Writer(Impl impl) {

    15         this.impl = impl;

    16     }

    17     public final void write(int c) throws IOException {

    18         char[] arr = { (char)c };

    19         impl.write(arr, 0, 1);

    20     }

    22     public final void write(char cbuf[]) throws IOException {

    23 	impl.write(cbuf, 0, cbuf.length);

    24     }

    25     public final void write(char cbuf[], int off, int len) throws IOException {

    26         impl.write(cbuf, off, len);

    27     }

    28     public final void write(String str) throws IOException {

    29 	impl.write(str, 0, str.length());

    30     }

    31     public final void write(String str, int off, int len) throws IOException {

    32         impl.write(str, off, len);

    33     }

    34     public final void flush() throws IOException {

    35         impl.flush();

    36     }

    37     public final void close() throws IOException {

    38         impl.close();

    39     }

    41     public static Writer create(Impl impl) {

    42         return new Writer(impl);

    43     }

    45     public static Writer create(final java.io.Writer w) {

    46         return new Writer(new Impl() {

    47             public void write(String str, int off, int len) throws IOException {

    48                 w.write(str, off, len);

    49             }

    51             public void write(char[] arr, int off, int len) throws IOException {

    52                 w.write(arr, off, len);

    53             }

    55             public void close() throws IOException {

    56                 w.close();

    57             }

    59             public void flush() throws IOException {

    60                 w.flush();

    61             }

    62         });

    63     }

    65     public static Writer createBuffered(final Writer out) {

    66         return create(new SimpleBuffer(out));

    67     }

    70     public static interface Impl {

    71         public void close() throws IOException;

    72         public void flush() throws IOException;

    73         public void write(String str, int off, int len) throws IOException;

    74         public void write(char[] arr, int off, int len) throws IOException;

    75     }

    76 }

    77 // END: writer.final.1.0

author	Jaroslav Tulach <jtulach@netbeans.org>
	Sat, 14 Jun 2008 09:58:08 +0200
changeset 153	b5cbb797ec0a
parent 133	50bf1b976c0d
child 154	0fd5e9c500b9
permissions	-rw-r--r--