Package org.dellroad.querystream.test.io

Class CapturePrintStream

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

java.io.PrintStream

org.dellroad.querystream.test.io.CapturePrintStream

All Implemented Interfaces:

Closeable, Flushable, Appendable, AutoCloseable

public class CapturePrintStream
extends PrintStream

A PrintStream that can capture what gets printed.

Field Summary

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

Constructors

Constructor	Description
CapturePrintStream(PrintStream out, boolean autoFlush, String charset)

Method Summary

Modifier and Type	Method	Description
void	close()
static CapturePrintStream	of(PrintStream out)	Create an instance.
boolean	startCapture()	Start capture.
byte[]	stopCapture()	Stop capture and return the captured data.
void	write(byte[] buf, int off, int len)
void	write(int b)

Methods inherited from class java.io.PrintStream

append, append, append, checkError, clearError, flush, format, format, print, print, print, print, print, print, print, print, print, printf, printf, println, println, println, println, println, println, println, println, println, println, setError, write, writeBytes

Methods inherited from class java.io.OutputStream

nullOutputStream

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

CapturePrintStream

public CapturePrintStream(PrintStream out,
 boolean autoFlush,
 String charset)
                   throws UnsupportedEncodingException

Throws:

UnsupportedEncodingException

Method Details

of

public static CapturePrintStream of(PrintStream out)

Create an instance.

Parameters:

out - underlying output stream

Returns:

new stream

Throws:

IllegalArgumentException - if out is null

startCapture

public boolean startCapture()

Start capture.

Returns:

true if capture was previously stopped, false if already capturing

stopCapture

public byte[] stopCapture()

Stop capture and return the captured data.

Returns:

captured output if capture was previously started, or null if not capturing

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class PrintStream

write

public void write(int b)

Overrides:

write in class PrintStream

write

public void write(byte[] buf,
 int off,
 int len)

Overrides:

write in class PrintStream