-// Copyright 2000-2005 the Contributors, as shown in the revision logs.
+// Copyright 2000-2007 the Contributors, as shown in the revision logs.
// Licensed under the Apache Public Source License 2.0 ("the License").
// You may not use this file except in compliance with the License.
import java.util.zip.*;
import org.ibex.util.*;
+// Features:
+// - automatically flush writer before reading on linked read/write pairs
+// - no checked exceptions thrown
+// - unified write(char), print(char), and write(byte)
+// - unreading/peeking
+// - transcribe
+// - append (daisy-chaining)
+// - automatically closes input streams when end reached
+
/** plays the role of InputStream, OutputStream, Reader and Writer, with logging and unchecked exceptions */
public class Stream {
private String newLine = "\r\n";
private Stream in_next = null;
- public Stream append(String in_next) { return appendStream(new Stream(in_next)); }
- public Stream appendStream(Stream in_next) {
- if (this.in_next != null)
- this.in_next.appendStream(in_next);
- else
- this.in_next = in_next;
- return this;
- }
-
- public void transcribe(Stream out) { transcribe(out, false); }
- public void transcribe(Stream out, boolean close) {
- try {
- byte[] buf = new byte[1024];
- while(true) {
- int numread = in.read(buf, 0, buf.length);
- if (numread==-1) { in.close(); break; }
- out.out.write(buf, 0, numread);
- }
- if (close) out.close();
- } catch (IOException ioe) { ioe(ioe); }
- }
-
- public void transcribe(StringBuffer out) {
- //try {
- char[] buf = new char[1024];
- while(true) {
- int numread = in.read(buf, 0, buf.length);
- if (numread==-1) { in.close(); return; }
- out.append(buf, 0, numread);
- }
- //} catch (IOException ioe) { ioe(ioe); }
- }
-
- public static int countLines(Stream s) {
- int ret = 0;
- while(s.readln() != null) ret++;
- s.close();
- return ret;
- }
-
public Stream(byte[] b, int off, int len) { this.in = new Stream.In(new ByteArrayInputStream(b, off, len)); this.out=null; }
public Stream(InputStream in) { this.in = new Stream.In(in); this.out = null; }
public Stream( OutputStream out) { this.in = null; this.out = new Stream.Out(out); }
try { this.out = new Stream.Out(s.getOutputStream()); } catch (IOException e) { ioe(e); throw new Error(); }
}
- static int ioe(IOException e) {
- if (e instanceof SocketException && e.toString().indexOf("Connection reset")!=-1)
- throw new Closed(e.getMessage());
- throw new StreamException(e);
- }
- public static class StreamException extends RuntimeException {
- public StreamException(Exception e) { super(e); }
- public StreamException(String s) { super(s); }
- }
- public static class EOF extends StreamException { public EOF() { super("End of stream"); } }
- public static class Closed extends StreamException { public Closed(String s) { super(s); } }
-
-
- public char peekc() {
- flush();
- return in.getc(true);
- }
- public char getc() {
- flush();
- char ret = in.getc(false);
- return ret;
- }
- public String readln() {
- flush();
- String s = in.readln();
- return s;
- }
-
- public void print(String s) {
- out.write(s);
- flush();
- }
- public void println(String s) {
- out.write(s);
- out.write(newLine);
- flush();
- }
- public void flush() {
- if (out != null) try { out.w.flush(); } catch(IOException e) { ioe(e); }
- }
- public int read(byte[] b, int off, int len) {
- flush();
- int ret = in.readBytes(b, off, len);
- nnl = false;
- return ret;
- }
- public int read(char[] c, int off, int len) {
- flush();
- int ret = in.read(c, off, len);
- return ret;
- }
+ // Main API //////////////////////////////////////////////////////////////////////////////
+ public char peekc() { flush(); return in.getc(true); }
+ public char getc() { flush(); return in.getc(false); }
+ public String readln() { flush(); return in.readln(); }
+ public void print(String s) { out.write(s); flush(); }
+ public void println(String s) { print(s); print(newLine); }
+ public void flush() { if (out != null) out.flushWriter(); }
+ public int read(byte[] b, int off, int len) { flush(); return in.readBytes(b, off, len); }
+ public int read(char[] c, int off, int len) { flush(); return in.read(c, off, len); }
public void unread(String s) { in.unread(s); }
-
- /** should not throw exceptions */
public void close() { try { if (in!=null) in.close(); } finally { if (out!=null) out.close(); } }
public void setNewline(String s) { newLine = s; }
-
- /** dumps the connection log into a file */
- private boolean nnl = false;
-
private static class Out extends BufferedOutputStream {
- private Writer w = new BufferedWriter(new OutputStreamWriter(this));
+ private Writer writer = new OutputStreamWriter(this);
public Out(OutputStream out) { super(out); }
- public void close() { try { super.close(); } catch (Exception e) { Log.error(this, e); } }
- public void write(String s) { try { w.write(s); } catch (IOException e) { ioe(e); } }
+ public void close() { try { super.close(); } catch (Exception e) { Log.error(this, e); } }
+ public void write(String s) { try { writer.write(s); } catch (IOException e) { ioe(e); } }
+ private void flushWriter() { try { writer.flush(); } catch (IOException e) { ioe(e); } }
+ public void flush() {
+ writer.flush();
+ super.flush();
+ }
}
private class In extends InputStream {
- public final Reader reader = new InputStreamReader(this);
+ public final Reader reader = new InputStreamReader(this);
+ private final Writer unreader = new OutputStreamWriter(new UnReaderStream());
private /*final*/ InputStream orig;
public In(InputStream in) { orig = in; }
public int available() { return flushing ? 0 : (end - start); }
public void close() { try {
- if (orig!=null) orig.close();
- if (in_next != null) in_next.close(); // FIXME: correct?
+ if (orig!=null) orig.close();
+ if (in_next != null) in_next.close();
} catch (Exception e) { Log.error(this, e); } }
public char getc(boolean peek) { try {
cstart = 0;
cend = reader.read(cbuf, 0, cbuf.length);
if (cend == -1) {
- reader.close();
cend = cstart;
if (in_next == null) throw new EOF();
return getc(peek);
} finally { flushing = false; }
}
- Writer unreader = new OutputStreamWriter(new InOutputStream());
- private class InOutputStream extends OutputStream {
+ private class UnReaderStream extends OutputStream {
public void close() { }
public void write(int i) throws IOException { byte[] b = new byte[1]; b[0] = (byte)i; write(b, 0, 1); }
public void write(byte[] b) throws IOException { write(b, 0, b.length); }
}
}
+ // Utilities: append() and transcribe() //////////////////////////////////////////////////////////////////////////////
+
+ public Stream append(String in_next) { return appendStream(new Stream(in_next)); }
+ public Stream appendStream(Stream in_next) {
+ if (this.in_next != null)
+ this.in_next.appendStream(in_next);
+ else
+ this.in_next = in_next;
+ return this;
+ }
+
+ public void transcribe(Stream out) { transcribe(out, false); }
+ public void transcribe(Stream out, boolean close) {
+ try {
+ byte[] buf = new byte[1024];
+ while(true) {
+ int numread = in.read(buf, 0, buf.length);
+ if (numread==-1) { in.close(); break; }
+ out.out.write(buf, 0, numread);
+ }
+ if (close) out.close();
+ } catch (IOException ioe) { ioe(ioe); }
+ }
+
+ public void transcribe(StringBuffer out) {
+ char[] buf = new char[1024];
+ while(true) {
+ int numread = in.read(buf, 0, buf.length);
+ if (numread==-1) { in.close(); return; }
+ out.append(buf, 0, numread);
+ }
+ }
+
+ public static int countLines(Stream s) {
+ int ret = 0;
+ while(s.readln() != null) ret++;
+ s.close();
+ return ret;
+ }
+
+ // Exceptions //////////////////////////////////////////////////////////////////////////////
+
+ static int ioe(IOException e) {
+ if (e instanceof SocketException && e.toString().indexOf("Connection reset")!=-1)
+ throw new Closed(e.getMessage());
+ throw new StreamException(e);
+ }
+ public static class StreamException extends RuntimeException {
+ public StreamException(Exception e) { super(e); }
+ public StreamException(String s) { super(s); }
+ }
+ public static class EOF extends StreamException { public EOF() { super("End of stream"); } }
+ public static class Closed extends StreamException { public Closed(String s) { super(s); } }
}
projects / org.ibex.io.git / commitdiff