cz.ues.platform.commons.lang

Class UESStreamBuffer

java.lang.Object

java.io.OutputStream

cz.ues.platform.commons.lang.UESStreamBuffer

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable

public class UESStreamBuffer
extends java.io.OutputStream

Implementation of OutputStream used as pipe between OutputStream and InputStream. Streams are connected using buffer. If size of piped data exceeds configured buffer size, temporary file is transparently used to store buffered data.

Since:

UES6-00

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private class	UESStreamBuffer.UESBufferFileInputStream Special implementation of FileInputStream which removes file when close method is called.

Field Summary

Fields

Modifier and Type	Field and Description
private int	actualSize Actual stored size.
private byte[]	buffer Memory buffer.
private java.io.File	bufferFile File buffer.
private java.io.InputStream	bufferIn File buffer input stream.
private java.io.OutputStream	bufferOut File buffer output stream.
private static int	DEFAULT_BUFFER_SIZE Default buffer size = 1MB.

Constructor Summary

Constructors

Constructor and Description
UESStreamBuffer() Creates new instance of UESStreamBuffer with default buffer size of 1MB.
UESStreamBuffer(int size) Creates new instance of UESStreamBuffer with given buffer size (in bytes).

Method Summary

Methods

Modifier and Type	Method and Description
void	clear() Method clears buffer - input stream returned from method getInputStream is closed and temporary buffer file is removed.
void	close()
void	flush()
private byte[]	getBufferedData() Get only actual data from buffer.
java.io.InputStream	getInputStream() Returns input stream for reading of buffered data.
void	write(int b)

Methods inherited from class java.io.OutputStream

write, write

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_BUFFER_SIZE

private static final DEFAULT_BUFFER_SIZE

Default buffer size = 1MB.

See Also:

Constant Field Values

actualSize

private actualSize

Actual stored size.

buffer

private buffer

Memory buffer.

bufferFile

private bufferFile

File buffer.

bufferOut

private bufferOut

File buffer output stream.

bufferIn

private bufferIn

File buffer input stream.

Constructor Detail

UESStreamBuffer

public UESStreamBuffer()

Creates new instance of UESStreamBuffer with default buffer size of 1MB.

Since:

UES6-00

UESStreamBuffer

public UESStreamBuffer(int size)

Creates new instance of UESStreamBuffer with given buffer size (in bytes).

Parameters:

size - Buffer size in bytes

Since:

UES6-00

Method Detail

getBufferedData

private byte[] getBufferedData()

Get only actual data from buffer.

Returns:

Data from buffer

Since:

UES6-00

write

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

Specified by:

write in class java.io.OutputStream

Throws:

java.io.IOException

Since:

UES6-00

flush

public void flush()
throws java.io.IOException

Specified by:

flush in interface java.io.Flushable

Overrides:

flush in class java.io.OutputStream

Throws:

java.io.IOException

Since:

UES6-00

close

public void close()
throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class java.io.OutputStream

Throws:

java.io.IOException

Since:

UES6-00

getInputStream

public java.io.InputStream getInputStream()
throws UESIORTException

Returns input stream for reading of buffered data.

Returns:

Input stream

Throws:

UESIORTException - In case input stream cannot be created

Since:

UES6-00

clear

public void clear()

Method clears buffer - input stream returned from method getInputStream is closed and temporary buffer file is removed.

Since:

UES6-00