/** * CodepagePrintStream.java * * Copyright (C) 1998-2000 COMITA Ltd. All Rights Reserved. */ import java.io.*; /** * Класс реализует методы PrintStream с возможностью работы в нужной кодировке. * * Обычно используется для замены стандартных System.out и System.err: *
* public static void main(String[] args) * { * // Установка вывода консольных сообщений в нужной кодировке * try * { * System.setOut(new CodepagePrintStream(System.out,System.getProperty("console.encoding","Cp866")) ); * } * catch(UnsupportedEncodingException e) * { * Msg.message(Msg.ALERT,"Unable to setup console codepage: " + e); * Msg.printStackTrace(Msg.ALERT,e); * } ** * @author Sergey Astakhov * @version 1.01, 24.07.2000 */ public class CodepagePrintStream extends PrintStream { public CodepagePrintStream(OutputStream os,String cp) throws UnsupportedEncodingException { super(os); this.autoFlush = false; this.charOut = new OutputStreamWriter(this,cp); this.textOut = new BufferedWriter(this.charOut); } private boolean autoFlush = false; private boolean trouble = false; /** * Track both the text- and character-output streams, so that their buffers * can be flushed without flushing the entire stream. */ private BufferedWriter textOut; private OutputStreamWriter charOut; /** Check to make sure that the stream has not been closed */ private void ensureOpen() throws IOException { if (out == null) throw new IOException("Stream closed"); } /** * Flush the stream. This is done by writing any buffered output bytes to * the underlying output stream and then flushing that stream. * * @see java.io.OutputStream#flush() */ public void flush() { synchronized (this) { try { ensureOpen(); out.flush(); } catch (IOException x) { trouble = true; } } } private boolean closing = false; /* To avoid recursive closing */ /** * Close the stream. This is done by flushing the stream and then closing * the underlying output stream. * * @see java.io.OutputStream#close() */ public void close() { synchronized (this) { if (! closing) { closing = true; try { textOut.close(); out.close(); } catch (IOException x) { trouble = true; } textOut = null; charOut = null; out = null; } } } /** * Flush the stream and check its error state. The internal error state * is set to
true
when the underlying output stream throws an
* IOException
other than InterruptedIOException
,
* and when the setError
method is invoked. If an operation
* on the underlying output stream throws an
* InterruptedIOException
, then the PrintStream
* converts the exception back into an interrupt by doing:
* * Thread.currentThread().interrupt(); ** or the equivalent. * * @return True if and only if this stream has encountered an *
IOException
other than
* InterruptedIOException
, or the
* setError
method has been invoked
*/
public boolean checkError() {
if (out != null)
flush();
return trouble;
}
/**
* Set the error state of the stream to true
.
*
* @since JDK1.1
*/
protected void setError() {
trouble = true;
}
/*
* Exception-catching, synchronized output operations,
* which also implement the write() methods of OutputStream
*/
/**
* Write the specified byte to this stream. If the byte is a newline and
* automatic flushing is enabled then the flush
method will be
* invoked.
*
* Note that the byte is written as given; to write a character that
* will be translated according to the platform's default character
* encoding, use the print(char)
or println(char)
* methods.
*
* @param b The byte to be written
* @see #print(char)
* @see #println(char)
*/
public void write(int b) {
try {
synchronized (this) {
ensureOpen();
out.write(b);
if ((b == '\n') && autoFlush)
out.flush();
}
}
catch (InterruptedIOException x) {
Thread.currentThread().interrupt();
}
catch (IOException x) {
trouble = true;
}
}
/**
* Write len
bytes from the specified byte array starting at
* offset off
to this stream. If automatic flushing is
* enabled then the flush
method will be invoked.
*
*
Note that the bytes will be written as given; to write characters
* that will be translated according to the platform's default character
* encoding, use the print(char)
or println(char)
* methods.
*
* @param buf A byte array
* @param off Offset from which to start taking bytes
* @param len Number of bytes to write
*/
public void write(byte buf[], int off, int len) {
try {
synchronized (this) {
ensureOpen();
out.write(buf, off, len);
if (autoFlush)
out.flush();
}
}
catch (InterruptedIOException x) {
Thread.currentThread().interrupt();
}
catch (IOException x) {
trouble = true;
}
}
/*
* The following private methods on the text- and character-output streams
* always flush the stream buffers, so that writes to the underlying byte
* stream occur as promptly as with the original PrintStream.
*/
private void write(char buf[]) {
try {
synchronized (this) {
ensureOpen();
textOut.write(buf);
textOut.flush();
charOut.flush();
if (autoFlush) {
for (int i = 0; i < buf.length; i++)
if (buf[i] == '\n')
out.flush();
}
}
}
catch (InterruptedIOException x) {
Thread.currentThread().interrupt();
}
catch (IOException x) {
trouble = true;
}
}
private void write(String s) {
try {
synchronized (this) {
ensureOpen();
textOut.write(s);
textOut.flush();
charOut.flush();
if (autoFlush && (s.indexOf('\n') >= 0))
out.flush();
}
}
catch (InterruptedIOException x) {
Thread.currentThread().interrupt();
}
catch (IOException x) {
trouble = true;
}
}
private void newLine() {
try {
synchronized (this) {
ensureOpen();
textOut.newLine();
textOut.flush();
charOut.flush();
if (autoFlush)
out.flush();
}
}
catch (InterruptedIOException x) {
Thread.currentThread().interrupt();
}
catch (IOException x) {
trouble = true;
}
}
/* Methods that do not terminate lines */
/**
* Print a boolean value. The string produced by {@link
* java.lang.String#valueOf(boolean)} is translated into bytes according to
* the platform's default character encoding, and these bytes are written
* in exactly the manner of the
{@link #write(int)} method.
*
* @param b The
boolean
to be printed
*/
public void print(boolean b) {
write(b ? "true" : "false");
}
/**
* Print a character. The character is translated into one or more bytes
* according to the platform's default character encoding, and these bytes
* are written in exactly the manner of the {@link #write(int)}
* method.
*
* @param c The
char
to be printed
*/
public void print(char c) {
write(String.valueOf(c));
}
/**
* Print an integer. The string produced by {@link
* java.lang.String#valueOf(int)} is translated into bytes according to the
* platform's default character encoding, and these bytes are written in
* exactly the manner of the
{@link #write(int)} method.
*
* @param i The
int
to be printed
*/
public void print(int i) {
write(String.valueOf(i));
}
/**
* Print a long integer. The string produced by {@link
* java.lang.String#valueOf(long)} is translated into bytes according to
* the platform's default character encoding, and these bytes are written
* in exactly the manner of the
{@link #write(int)} method.
*
* @param l The
long
to be printed
*/
public void print(long l) {
write(String.valueOf(l));
}
/**
* Print a floating-point number. The string produced by {@link
* java.lang.String#valueOf(float)} is translated into bytes according to
* the platform's default character encoding, and these bytes are written
* in exactly the manner of the
{@link #write(int)} method.
*
* @param f The
float
to be printed
*/
public void print(float f) {
write(String.valueOf(f));
}
/**
* Print a double-precision floating-point number. The string produced by
* {@link java.lang.String#valueOf(double)} is translated into bytes
* according to the platform's default character encoding, and these bytes
* are written in exactly the manner of the
{@link #write(int)}
* method.
*
* @param d The
double
to be printed
*/
public void print(double d) {
write(String.valueOf(d));
}
/**
* Print an array of characters. The characters are converted into bytes
* according to the platform's default character encoding, and these bytes
* are written in exactly the manner of the {@link #write(int)}
* method.
*
* @param s The array of chars to be printed
*
* @throws NullPointerException If
s
is null
*/
public void print(char s[]) {
write(s);
}
/**
* Print a string. If the argument is null
then the string
* "null"
is printed. Otherwise, the string's characters are
* converted into bytes according to the platform's default character
* encoding, and these bytes are written in exactly the manner of the
* {@link #write(int)} method.
*
* @param s The
String
to be printed
*/
public void print(String s) {
if (s == null) {
s = "null";
}
write(s);
}
/**
* Print an object. The string produced by the {@link
* java.lang.String#valueOf(Object)} method is translated into bytes
* according to the platform's default character encoding, and these bytes
* are written in exactly the manner of the
{@link #write(int)}
* method.
*
* @param obj The
Object
to be printed
*/
public void print(Object obj) {
write(String.valueOf(obj));
}
/* Methods that do terminate lines */
/**
* Terminate the current line by writing the line separator string. The
* line separator string is defined by the system property
* line.separator
, and is not necessarily a single newline
* character ('\n'
).
*/
public void println() {
newLine();
}
/**
* Print a boolean and then terminate the line. This method behaves as
* though it invokes {@link #print(boolean)} and then
{@link
* #println()}
.
*/
public void println(boolean x) {
synchronized (this) {
print(x);
newLine();
}
}
/**
* Print a character and then terminate the line. This method behaves as
* though it invokes {@link #print(char)} and then
{@link
* #println()}
.
*/
public void println(char x) {
synchronized (this) {
print(x);
newLine();
}
}
/**
* Print an integer and then terminate the line. This method behaves as
* though it invokes {@link #print(int)} and then
{@link
* #println()}
.
*/
public void println(int x) {
synchronized (this) {
print(x);
newLine();
}
}
/**
* Print a long and then terminate the line. This method behaves as
* though it invokes {@link #print(long)} and then
{@link
* #println()}
.
*/
public void println(long x) {
synchronized (this) {
print(x);
newLine();
}
}
/**
* Print a float and then terminate the line. This method behaves as
* though it invokes {@link #print(float)} and then
{@link
* #println()}
.
*/
public void println(float x) {
synchronized (this) {
print(x);
newLine();
}
}
/**
* Print a double and then terminate the line. This method behaves as
* though it invokes {@link #print(double)} and then
{@link
* #println()}
.
*/
public void println(double x) {
synchronized (this) {
print(x);
newLine();
}
}
/**
* Print an array of characters and then terminate the line. This method
* behaves as though it invokes {@link #print(char[])} and then
*
{@link #println()}
.
*/
public void println(char x[]) {
synchronized (this) {
print(x);
newLine();
}
}
/**
* Print a String and then terminate the line. This method behaves as
* though it invokes {@link #print(String)} and then
{@link
* #println()}
.
*/
public void println(String x) {
synchronized (this) {
print(x);
newLine();
}
}
/**
* Print an Object and then terminate the line. This method behaves as
* though it invokes {@link #print(Object)} and then
{@link
* #println()}
.
*/
public void println(Object x) {
synchronized (this) {
print(x);
newLine();
}
}
}