com.caucho.vfs

Class NullWriteStream

java.lang.Object

java.io.OutputStream

com.caucho.vfs.OutputStreamWithBuffer

com.caucho.vfs.WriteStream

com.caucho.vfs.NullWriteStream

All Implemented Interfaces:

ByteAppendable, LockableStream, SendfileOutputStream, java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable

public class NullWriteStream
extends WriteStream

A WriteStream that writes to nothing.

Constructor Summary

Constructors

Constructor and Description
NullWriteStream()

Method Summary

Modifier and Type	Method and Description
boolean	canWrite() Returns true if the buffer allows writes.
void	flush() Flushes the buffer to the source.
void	write(byte[] buf) Writes a byte array.
void	write(byte[] buf, int offset, int length) Writes a byte array
void	write(int ch) Writes a byte.

Methods inherited from class com.caucho.vfs.WriteStream

clearPosition, clearWrite, close, flushBuffer, flushToDisk, free, getAttribute, getAttributeNames, getBuffer, getBufferOffset, getBufferSize, getDisableClose, getEncoding, getJavaEncoding, getNewlineString, getPath, getPosition, getPrintWriter, getRemaining, getSource, getUserPath, init, isClosed, isMmapEnabled, isSendfileEnabled, lock, log, log, nextBuffer, print, print, print, print, print, print, print, print, print, print, print, print, printLatin1, printLatin1, printLatin1NoLf, println, println, println, println, println, println, println, println, println, println, printUtf8, pushFilter, removeAttribute, seekEnd, seekStart, setAttribute, setBufferOffset, setDisableClose, setDisableCloseSource, setEncoding, setFlushOnNewline, setImplicitFlush, setLocale, setNewlineString, setPath, setPosition, setReuseBuffer, setSysNewline, setSystemNewline, toString, unlock, writeFile, writeMmap, writeSendfile, writeStream, writeStream, writeStream, writeStream, XprintLatin1NoLf

Methods inherited from class java.lang.Object

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

Constructor Detail

NullWriteStream

public NullWriteStream()

Method Detail

canWrite

public boolean canWrite()

Description copied from class: WriteStream

Returns true if the buffer allows writes.

LogStreams, used for debugging, use this feature to test if they should write with very little overhead.

 if (dbg.canWrite())
   dbg.log("some debug value " + expensiveDebugCalculation(foo));
 

Overrides:

canWrite in class WriteStream

write

public void write(int ch)
           throws java.io.IOException

Writes a byte.

Specified by:

write in interface ByteAppendable

Overrides:

write in class WriteStream

Throws:

java.io.IOException

write

public void write(byte[] buf,
                  int offset,
                  int length)
           throws java.io.IOException

Writes a byte array

Specified by:

write in interface ByteAppendable

Overrides:

write in class WriteStream

Throws:

java.io.IOException

write

public void write(byte[] buf)
           throws java.io.IOException

Writes a byte array.

Overrides:

write in class WriteStream

Throws:

java.io.IOException

flush

public void flush()
           throws java.io.IOException

Flushes the buffer to the source.

Specified by:

flush in interface java.io.Flushable

Overrides:

flush in class WriteStream

Throws:

java.io.IOException