-// Copyright 2004 Adam Megacz, see the COPYING file for licensing [LGPL]
+// 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.
+
package org.ibex.io;
import java.io.*;
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 {
protected final In in;
protected final Out out;
- private StringBuffer log = loggingEnabled ? new StringBuffer(16 * 1024) : null;
private String newLine = "\r\n";
+ private Stream in_next = null;
- public static boolean loggingEnabled = System.getProperty("ibex.io.stream.logEnabled", "true") != null;
-
+ 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); }
public Stream(InputStream in, OutputStream out) { this.in = new Stream.In(in); this.out = new Stream.Out(out); }
public Stream(String s) { this(new ByteArrayInputStream(s.getBytes())); }
- public Stream(Socket s) {
- try { this.in = new Stream.In(s.getInputStream()); } catch (IOException e) { throw new StreamException(e); }
- try { this.out = new Stream.Out(s.getOutputStream()); } catch (IOException e) { throw new StreamException(e); }
+ public Stream(File f) {
+ try { this.in = new Stream.In(new FileInputStream(f)); } catch (IOException e) { ioe(e); throw new Error(); }
+ this.out = null;
}
-
- private static int ioe(Exception e) { 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); } }
-
-
- private static Hashtable blocker = new Hashtable();
- public static void kill(Thread thread) {
- Stream block = (Stream)blocker.get(thread);
- if (block == null) {
- Log.warn(Stream.class, "thread " + thread + " is not blocked on a stream");
- } else {
- Log.warn(Stream.class, "asynchronously closing " + block);
- block.close();
- }
+ public Stream(Socket s) {
+ try { this.in = new Stream.In(s.getInputStream()); } catch (IOException e) { ioe(e); throw new Error(); }
+ try { this.out = new Stream.Out(s.getOutputStream()); } catch (IOException e) { ioe(e); throw new Error(); }
}
- public char peekc() {
- Stream old = (Stream)blocker.get(Thread.currentThread());
- try {
- blocker.put(Thread.currentThread(), this);
- flush(); return in.getc(true);
- } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
- }
- public char getc() {
- Stream old = (Stream)blocker.get(Thread.currentThread());
- try {
- blocker.put(Thread.currentThread(), this);
- flush(); char ret = in.getc(false); log(ret); return ret;
- } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
- }
- public String readln() {
- Stream old = (Stream)blocker.get(Thread.currentThread());
- try {
- blocker.put(Thread.currentThread(), this);
- flush(); String s = in.readln(); log(s); log('\n'); return s;
- } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
- }
-
- public void print(String s) {
- Stream old = (Stream)blocker.get(Thread.currentThread());
- try {
- blocker.put(Thread.currentThread(), this);
- logWrite(s);
- out.write(s);
- flush();
- } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
- }
- public void println(String s) {
- Stream old = (Stream)blocker.get(Thread.currentThread());
- try {
- blocker.put(Thread.currentThread(), this);
- logWrite(s);
- out.write(s);
- out.write(newLine);
- flush();
- } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
- }
- public void flush() {
- Stream old = (Stream)blocker.get(Thread.currentThread());
- try {
- blocker.put(Thread.currentThread(), this);
- if (out != null) try { out.w.flush(); } catch(IOException e) { ioe(e); }
- } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
- }
- public int read(byte[] b, int off, int len) {
- Stream old = (Stream)blocker.get(Thread.currentThread());
- try {
- blocker.put(Thread.currentThread(), this);
- flush();
- int ret = in.readBytes(b, off, len);
- if (log != null) log("\n[read " + ret + " bytes of binary data ]\n");
- nnl = false;
- return ret;
- } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
- }
- public int read(char[] c, int off, int len) {
- Stream old = (Stream)blocker.get(Thread.currentThread());
- try {
- blocker.put(Thread.currentThread(), this);
- flush();
- int ret = in.read(c, off, len);
- if (log != null && ret != -1) log(new String(c, off, ret));
- return ret;
- } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
- }
+ // 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); }
-
- public void close() { try { in.close(); } finally { out.close(); } }
+ 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 */
- public String dumpLog() { String ret = log.toString(); log = new StringBuffer(16 * 1024); return ret; }
- private void log(String s) { if(log==null) return; if (!nnl) Log.note("\n[read ] "); Log.note(s + "\n"); nnl=false; if (log != null) log.append(s); }
- private void logWrite(String s) { if(log==null) return; if (nnl) Log.note("\n"); Log.note("[write] "+s+"\n"); nnl=false; if (log != null) log.append(s); }
- private void log(char c) { if(log==null) return; if (c == '\r') return; if (!nnl) Log.note("[read ] "); Log.note(c+""); nnl = c != '\n'; if (log != null) log.append(c); }
- 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 static class In extends InputStream {
- public Reader reader = new InputStreamReader(this);
- private final InputStream orig;
+ private class In extends InputStream {
+ 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; }
char[] cbuf = new char[8192];
boolean flushing = false;
public int available() { return flushing ? 0 : (end - start); }
- public void close() { try { orig.close(); } catch (Exception e) { Log.error(this, e); } }
+ public void close() { try {
+ 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 {
if (cstart == cend) {
cstart = 0;
cend = reader.read(cbuf, 0, cbuf.length);
- if (cend == -1) { cend = cstart; throw new EOF(); }
+ if (cend == -1) {
+ cend = cstart;
+ if (in_next == null) throw new EOF();
+ return getc(peek);
+ }
}
return peek ? cbuf[cstart] : cbuf[cstart++];
} catch (IOException e) { return (char)ioe(e); } }
ensurec(256);
int numread = reader.read(cbuf, cend, cbuf.length - cend);
if (numread == -1) {
+ reader.close();
if (cstart == cend) return null;
String ret = new String(cbuf, cstart, cend-cstart);
cstart = cend = 0;
if (cstart == cend) {
cstart = 0;
cend = reader.read(cbuf, 0, cbuf.length);
- if (cend == -1) { cend = cstart; return -1; }
+ if (cend == -1) { reader.close(); cend = cstart; return -1; }
}
if (len > cend - cstart) len = cend - cstart;
System.arraycopy(cbuf, cstart, c, pos, len);
if (start == end) {
start = 0;
end = orig.read(buf, 0, buf.length);
- if (end == -1) { end = start; return -1; }
+ if (end == -1) {
+ orig.close();
+ end = start;
+ if (in_next==null) return -1;
+ return in_next.read(b, pos, len);
+ }
}
if (len > end - start) len = end - start;
System.arraycopy(buf, start, b, pos, len);
private void flushchars() {
try {
flushing = true;
- for(; reader.ready(); reader.read(cbuf, cend++, 1)) ensurec(1);
- unreader.write(cbuf, cstart, cend);
+ for(; reader.ready(); reader.read(cbuf, cend++, 1)) ensurec(10);
+ if (cend>cstart)
+ unreader.write(cbuf, cstart, cend-cstart);
cstart = cend = 0;
unreader.flush();
} catch (IOException e) { ioe(e);
} 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 / blobdiff