hg/apidesign: samples/delegatingwriterfinal/src-api1.0/api/Writer.java@b029a28df444

     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 public final class Writer {

    11     private final Impl impl;

    13     private Writer(Impl impl) {

    14         this.impl = impl;

    15     }

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

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

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

    19     }

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

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

    23     }

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

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

    26     }

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

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

    29     }

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

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

    32     }

    33     public final void flush() throws IOException {

    34         impl.flush();

    35     }

    36     public final void close() throws IOException {

    37         impl.close();

    38     }

    40     public static Writer create(Impl impl) {

    41         return new Writer(impl);

    42     }

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

    45         return new Writer(new Impl() {

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

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

    48             }

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

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

    52             }

    54             public void close() throws IOException {

    55                 w.close();

    56             }

    58             public void flush() throws IOException {

    59                 w.flush();

    60             }

    61         });

    62     }

    64     public static Writer createBuffered(final Writer out) {

    65         return create(new SimpleBuffer(out));

    66     }

    69     public static interface Impl {

    70         public void close() throws IOException;

    71         public void flush() throws IOException;

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

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

    74     }

    78 }

author	Jaroslav Tulach <jtulach@netbeans.org>
	Sat, 14 Jun 2008 09:53:07 +0200
changeset 67	b029a28df444
parent 65	4db7ceebd2b3
child 68	a2de5429d581
permissions	-rw-r--r--