Package org.apache.catalina.connector

Class InputBuffer

java.lang.Object

java.io.Reader

org.apache.catalina.connector.InputBuffer

All Implemented Interfaces:

Closeable, AutoCloseable, Readable, ByteChunk.ByteInputChannel, ApplicationBufferHandler

public class InputBuffer
extends Reader
implements ByteChunk.ByteInputChannel, ApplicationBufferHandler

The buffer used by Tomcat request. This is a derivative of the Tomcat 3.3 OutputBuffer, adapted to handle input instead of output. This allows complete recycling of the facade objects (the ServletInputStream and the BufferedReader).

Author:

Remy Maucherat

Field Summary

Fields

Modifier and Type	Field	Description
final int	BYTE_STATE
final int	CHAR_STATE
protected B2CConverter	conv	Current byte to char converter.
static final int	DEFAULT_BUFFER_SIZE
final int	INITIAL_STATE
protected static final StringManager	sm	The string manager for this package.

Fields inherited from class java.io.Reader

lock

Fields inherited from interface org.apache.tomcat.util.net.ApplicationBufferHandler

EMPTY, EMPTY_BUFFER

Constructor Summary

Constructors

Constructor	Description
InputBuffer()	Default constructor.
InputBuffer(int size)	Alternate constructor which allows specifying the initial buffer size.

Method Summary

Modifier and Type	Method	Description
int	available()
void	checkConverter()
void	close()
void	expand(int size)	Expand the byte buffer to at least the given size.
ByteBuffer	getByteBuffer()
boolean	isFinished()
boolean	isReady()
void	mark(int readAheadLimit)
boolean	markSupported()
int	read()
int	read(byte[] b, int off, int len)
int	read(char[] cbuf)
int	read(char[] cbuf, int off, int len)
int	read(ByteBuffer to)	Transfers bytes from the buffer to the specified ByteBuffer.
int	readByte()
boolean	ready()
int	realReadBytes()	Read new bytes.
int	realReadChars()
void	recycle()	Recycle the output buffer.
void	reset()
void	setByteBuffer(ByteBuffer buffer)	Set the byte buffer.
void	setReadListener(ReadListener listener)
void	setRequest(Request coyoteRequest)	Associated Coyote request.
long	skip(long n)

Methods inherited from class java.io.Reader

nullReader, read, transferTo

Methods inherited from class java.lang.Object

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

Field Details

sm

protected static final StringManager sm

The string manager for this package.

DEFAULT_BUFFER_SIZE

public static final int DEFAULT_BUFFER_SIZE

See Also:

• Constant Field Values

INITIAL_STATE

public final int INITIAL_STATE

See Also:

• Constant Field Values

CHAR_STATE

public final int CHAR_STATE

See Also:

• Constant Field Values

BYTE_STATE

public final int BYTE_STATE

See Also:

• Constant Field Values

conv

protected B2CConverter conv

Current byte to char converter.

Constructor Details

InputBuffer

public InputBuffer()

Default constructor. Allocate the buffer with the default buffer size.

InputBuffer

public InputBuffer(int size)

Alternate constructor which allows specifying the initial buffer size.

Parameters:

size - Buffer size to use

Method Details

setRequest

public void setRequest(Request coyoteRequest)

Associated Coyote request.

Parameters:

coyoteRequest - Associated Coyote request

recycle

public void recycle()

Recycle the output buffer.

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in class Reader

Throws:

IOException

available

public int available()

setReadListener

public void setReadListener(ReadListener listener)

isFinished

public boolean isFinished()

isReady

public boolean isReady()

realReadBytes

public int realReadBytes()
                  throws IOException

Description copied from interface: ByteChunk.ByteInputChannel

Read new bytes.

Specified by:

realReadBytes in interface ByteChunk.ByteInputChannel

Returns:

The number of bytes read

Throws:

IOException - If an I/O error occurs during reading

readByte

public int readByte()
             throws IOException

Throws:

IOException

read

public int read(byte[] b,
 int off,
 int len)
         throws IOException

Throws:

IOException

read

public int read(ByteBuffer to)
         throws IOException

Transfers bytes from the buffer to the specified ByteBuffer. After the operation the position of the ByteBuffer will be returned to the one before the operation, the limit will be the position incremented by the number of the transferred bytes.

Parameters:

to - the ByteBuffer into which bytes are to be written.

Returns:

an integer specifying the actual number of bytes read, or -1 if the end of the stream is reached

Throws:

IOException - if an input or output exception has occurred

realReadChars

public int realReadChars()
                  throws IOException

Throws:

IOException

read

public int read()
         throws IOException

Overrides:

read in class Reader

Throws:

IOException

read

public int read(char[] cbuf)
         throws IOException

Overrides:

read in class Reader

Throws:

IOException

read

public int read(char[] cbuf,
 int off,
 int len)
         throws IOException

Specified by:

read in class Reader

Throws:

IOException

skip

public long skip(long n)
          throws IOException

Overrides:

skip in class Reader

Throws:

IOException

ready

public boolean ready()
              throws IOException

Overrides:

ready in class Reader

Throws:

IOException

markSupported

public boolean markSupported()

Overrides:

markSupported in class Reader

mark

public void mark(int readAheadLimit)
          throws IOException

Overrides:

mark in class Reader

Throws:

IOException

reset

public void reset()
           throws IOException

Overrides:

reset in class Reader

Throws:

IOException

checkConverter

public void checkConverter()
                    throws IOException

Throws:

IOException

setByteBuffer

public void setByteBuffer(ByteBuffer buffer)

Description copied from interface: ApplicationBufferHandler

Set the byte buffer.

Specified by:

setByteBuffer in interface ApplicationBufferHandler

Parameters:

buffer - the byte buffer

getByteBuffer

public ByteBuffer getByteBuffer()

Specified by:

getByteBuffer in interface ApplicationBufferHandler

Returns:

the byte buffer

expand

public void expand(int size)

Description copied from interface: ApplicationBufferHandler

Expand the byte buffer to at least the given size. Some implementations may not implement this.

Specified by:

expand in interface ApplicationBufferHandler

Parameters:

size - the desired size