jtulach@65: package api;
jtulach@65: 
jtulach@65: import java.io.IOException;
jtulach@65: 
jtulach@65: /** Fixing the problem caused by mixing subclassing and delegation in 
jtulach@65:  * the <code>java.io.BufferedWriter</code>
jtulach@65:  *
jtulach@65:  * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
jtulach@65:  */
jtulach@68: // BEGIN: writer.final.2.0
jtulach@67: public final class Writer implements Appendable {
jtulach@65:     private final Impl impl;
jtulach@66:     private final ImplSeq seq;
jtulach@65:     
jtulach@66:     private Writer(Impl impl, ImplSeq seq) {
jtulach@65:         this.impl = impl;
jtulach@66:         this.seq = seq;
jtulach@65:     }
jtulach@65:     public final void write(int c) throws IOException {
jtulach@66:         if (impl != null) {
jtulach@66:             char[] arr = {(char) c};
jtulach@66:             impl.write(arr, 0, 1);
jtulach@66:         } else {
jtulach@66:             seq.write(new CharSeq(c));
jtulach@66:         }
jtulach@65:     }
jtulach@65:     
jtulach@65:     public final void write(char cbuf[]) throws IOException {
jtulach@66:         if (impl != null) {
jtulach@66:             impl.write(cbuf, 0, cbuf.length);
jtulach@66:         } else {
jtulach@66:             seq.write(new CharSeq(cbuf, 0, cbuf.length));
jtulach@66:         }
jtulach@65:     }
jtulach@154:     public final void write(char cbuf[], int off, int len) 
jtulach@154:     throws IOException {
jtulach@66:         if (impl != null) {
jtulach@66:             impl.write(cbuf, off, len);
jtulach@66:         } else {
jtulach@66:             seq.write(new CharSeq(cbuf, off, len));
jtulach@66:         }
jtulach@65:     }
jtulach@65:     public final void write(String str) throws IOException {
jtulach@66:         if (impl != null) {
jtulach@66:             impl.write(str, 0, str.length());
jtulach@66:         } else {
jtulach@66:             seq.write(str);
jtulach@66:         }
jtulach@65:     }
jtulach@154:     public final void write(String str, int off, int len) 
jtulach@154:     throws IOException {
jtulach@66:         if (impl != null) {
jtulach@66:             impl.write(str, off, len);
jtulach@66:         } else {
jtulach@66:             seq.write(str.subSequence(off, off + len));
jtulach@66:         }
jtulach@65:     }
jtulach@65: 
jtulach@66:     public final void flush() throws IOException {
jtulach@66:         if (impl != null) {
jtulach@66:             impl.flush();
jtulach@66:         } else {
jtulach@66:             seq.flush();
jtulach@66:         }
jtulach@66:     }
jtulach@66:     public final void close() throws IOException {
jtulach@66:         if (impl != null) {
jtulach@66:             impl.close();
jtulach@66:         } else {
jtulach@66:             seq.flush();
jtulach@66:         }
jtulach@66:     }
jtulach@66: 
jtulach@67:     
jtulach@67:     
jtulach@67:     public final Writer append(CharSequence csq) throws IOException {
jtulach@67:         if (impl != null) {
jtulach@67:             String s = csq == null ? "null" : csq.toString();
jtulach@67:             impl.write(s, 0, s.length());
jtulach@67:         } else {
jtulach@67:             seq.write(csq);
jtulach@67:         }
jtulach@67:         return this;
jtulach@67:     }
jtulach@67: 
jtulach@154:     public final Writer append(CharSequence csq, int start, int end) 
jtulach@154:     throws IOException {
jtulach@67:         return append(csq.subSequence(start, end));
jtulach@67:     }
jtulach@67: 
jtulach@67:     public final Writer append(char c) throws IOException {
jtulach@67:         write(c);
jtulach@67:         return this;
jtulach@67:     }
jtulach@67: 
jtulach@66:     public static Writer create(Impl impl) {
jtulach@66:         return new Writer(impl, null);
jtulach@66:     }
jtulach@66: 
jtulach@210:     public static Writer create(ImplSeq seq) {
jtulach@210:         return new Writer(null, seq);
jtulach@66:     }
jtulach@66:     
jtulach@66:     public static Writer create(final java.io.Writer w) {
jtulach@67:         return new Writer(null, new ImplSeq() {
jtulach@67:             public void write(CharSequence seq) throws IOException {
jtulach@67:                 w.append(seq);
jtulach@66:             }
jtulach@66: 
jtulach@66:             public void close() throws IOException {
jtulach@66:                 w.close();
jtulach@66:             }
jtulach@66: 
jtulach@66:             public void flush() throws IOException {
jtulach@66:                 w.flush();
jtulach@66:             }
jtulach@67:         });
jtulach@66:     }
jtulach@66:     
jtulach@66:     public static Writer createBuffered(final Writer out) {
jtulach@67:         return create(new SimpleBuffer(out));
jtulach@66:     }
jtulach@65:     
jtulach@65:     
jtulach@65:     public static interface Impl {
jtulach@66:         public void close() throws IOException;
jtulach@66:         public void flush() throws IOException;
jtulach@66:         public void write(String str, int off, int len) throws IOException;
jtulach@66:         public void write(char[] arr, int off, int len) throws IOException;
jtulach@66:     }
jtulach@66:     public static interface ImplSeq {
jtulach@66:         public void close() throws IOException;
jtulach@66:         public void flush() throws IOException;
jtulach@65:         public void write(CharSequence seq) throws IOException;
jtulach@65:     }
jtulach@65: }
jtulach@68: // END: writer.final.2.0