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samples/delegatingwriterfinal/src-api1.0/api/Writer.java
author Jaroslav Tulach <jtulach@netbeans.org>
Sat, 14 Jun 2008 09:58:11 +0200
changeset 154 0fd5e9c500b9
parent 153 b5cbb797ec0a
permissions -rw-r--r--
Merge: Geertjan's changs up to 2000 
     1 package api;

     2 

     3 import java.io.IOException;

     4 

     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;

    13     

    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     }

    21     

    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) 

    26     throws IOException {

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

    28     }

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

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

    31     }

    32     public final void write(String str, int off, int len) 

    33     throws IOException {

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

    35     }

    36     public final void flush() throws IOException {

    37         impl.flush();

    38     }

    39     public final void close() throws IOException {

    40         impl.close();

    41     }

    42 

    43     public static Writer create(Impl impl) {

    44         return new Writer(impl);

    45     }

    46     

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

    48         return new Writer(new Impl() {

    49             public void write(String str, int off, int len) 

    50             throws IOException {

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

    52             }

    53 

    54             public void write(char[] arr, int off, int len) 

    55             throws IOException {

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

    57             }

    58 

    59             public void close() throws IOException {

    60                 w.close();

    61             }

    62 

    63             public void flush() throws IOException {

    64                 w.flush();

    65             }

    66         });

    67     }

    68     

    69     public static Writer createBuffered(final Writer out) {

    70         return create(new SimpleBuffer(out));

    71     }

    72 

    73     

    74     public static interface Impl {

    75         public void close() throws IOException;

    76         public void flush() throws IOException;

    77         public void write(String s, int off, int len) throws IOException;

    78         public void write(char[] a, int off, int len) throws IOException;

    79     }

    80 }

    81 // END: writer.final.1.0
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