Package org.apache.wicket.util.io

Class ByteArrayOutputStream

java.lang.Object

java.io.OutputStream

org.apache.wicket.util.io.ByteArrayOutputStream

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable

public class ByteArrayOutputStream
extends OutputStream

This class implements an output stream in which the data is written into a byte array. The buffer automatically grows as data is written to it.

The data can be retrieved using toByteArray() and toString().

Closing a ByteArrayOutputStream has no effect. The methods in this class can be called after the stream has been closed without generating an IOException.

This is an alternative implementation of the java.io.ByteArrayOutputStream class. The original implementation only allocates 32 bytes at the beginning. As this class is designed for heavy duty it starts at 1024 bytes. In contrast to the original it doesn't reallocate the whole memory block but allocates additional buffers. This way no buffers need to be garbage collected and the contents don't have to be copied to the new buffer. This class is designed to behave exactly like the original. The only exception is the deprecated toString(int) method that has been ignored.

Version:

$Id$

Author:

Jeremias Maerki

Constructor Summary

Constructors

Constructor	Description
ByteArrayOutputStream()	Creates a new byte array output stream.
ByteArrayOutputStream(int size)	Creates a new byte array output stream, with a buffer capacity of the specified size, in bytes.

Method Summary

Modifier and Type	Method	Description
void	close()	Closing a ByteArrayOutputStream has no effect.
void	reset()
int	size()	Gets the size.
byte[]	toByteArray()	Writes to a byte array.
String	toString()
String	toString(String enc)	This as a string using the provided encoding.
void	write(byte[] b, int off, int len)
void	write(int b)	Calls the write(byte[]) method.
void	writeTo(OutputStream out)	Write to the given output stream.

Methods inherited from class java.io.OutputStream

flush, nullOutputStream, write

Methods inherited from class java.lang.Object

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

Constructor Detail

ByteArrayOutputStream

public ByteArrayOutputStream()

Creates a new byte array output stream. The buffer capacity is initially 1024 bytes, though its size increases if necessary.

ByteArrayOutputStream

public ByteArrayOutputStream(int size)

Creates a new byte array output stream, with a buffer capacity of the specified size, in bytes.

Parameters:

size - the initial size.

Throws:

IllegalArgumentException - if size is negative.

Method Detail

close

public void close()
           throws IOException

Closing a ByteArrayOutputStream has no effect. The methods in this class can be called after the stream has been closed without generating an IOException.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class OutputStream

Throws:

IOException - in case an I/O error occurs

reset

public void reset()

See Also:

ByteArrayOutputStream.reset()

size

public int size()

Gets the size.

Returns:

the size

toByteArray

public byte[] toByteArray()

Writes to a byte array.

Returns:

this is a byte array

toString

public String toString()

Overrides:

toString in class Object

See Also:

Object.toString()

toString

public String toString(String enc)
                throws UnsupportedEncodingException

This as a string using the provided encoding.

Parameters:

enc - the encoding to use

Returns:

This as a string using the provided encoding

Throws:

UnsupportedEncodingException

write

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

Overrides:

write in class OutputStream

See Also:

OutputStream.write(byte[], int, int)

write

public void write(int b)

Calls the write(byte[]) method.

Specified by:

write in class OutputStream

See Also:

OutputStream.write(int)

writeTo

public void writeTo(OutputStream out)
             throws IOException

Write to the given output stream.

Parameters:

out - the output stream to write to

Throws:

IOException

See Also:

ByteArrayOutputStream.writeTo(OutputStream)