org.apache.james.mime4j.io

Class BufferedLineReaderInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

org.apache.james.mime4j.io.LineReaderInputStream

org.apache.james.mime4j.io.BufferedLineReaderInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class BufferedLineReaderInputStream
extends LineReaderInputStream

Input buffer that can be used to search for patterns using Quick Search algorithm in data read from an InputStream.

Field Summary

Fields

Modifier and Type	Field and Description
private byte[]	buffer
private int	buflen
private int	bufpos
private int	maxLineLen
private byte[]	origBuffer
private int	origBuflen
private int	origBufpos
(package private) boolean	tempBuffer
private boolean	truncated

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

Constructors

Constructor and Description
BufferedLineReaderInputStream(java.io.InputStream instream, int buffersize)
BufferedLineReaderInputStream(java.io.InputStream instream, int buffersize, int maxLineLen)

Method Summary

Modifier and Type	Method and Description
protected byte[]	buf()
private int	bufferLen()
int	byteAt(int pos)
int	capacity()
private void	clear()
void	ensureCapacity(int len)
private void	expand(int newlen)
int	fillBuffer()
boolean	hasBufferedData()
int	indexOf(byte b)
int	indexOf(byte[] pattern) Implements quick search algorithm as published by
int	indexOf(byte[] pattern, int off, int len) Implements quick search algorithm as published by
int	indexOf(byte b, int off, int len)
protected int	length()
protected int	limit()
boolean	markSupported()
protected int	pos()
int	read()
int	read(byte[] b)
int	read(byte[] b, int off, int len)
protected boolean	readAllowed()
int	readLine(ByteArrayBuffer dst) Reads one line of text into the given ByteArrayBuffer.
protected int	skip(int n)
java.lang.String	toString()
void	truncate()
boolean	unread(ByteArrayBuffer buf) Tries to unread the last read line.

Methods inherited from class java.io.FilterInputStream

available, close, mark, reset, skip

Methods inherited from class java.lang.Object

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

Field Detail

truncated

private boolean truncated

tempBuffer

boolean tempBuffer

origBuffer

private byte[] origBuffer

origBufpos

private int origBufpos

origBuflen

private int origBuflen

buffer

private byte[] buffer

bufpos

private int bufpos

buflen

private int buflen

maxLineLen

private final int maxLineLen

Constructor Detail

BufferedLineReaderInputStream

public BufferedLineReaderInputStream(java.io.InputStream instream,
                                     int buffersize,
                                     int maxLineLen)

BufferedLineReaderInputStream

public BufferedLineReaderInputStream(java.io.InputStream instream,
                                     int buffersize)

Method Detail

expand

private void expand(int newlen)

ensureCapacity

public void ensureCapacity(int len)

fillBuffer

public int fillBuffer()
               throws java.io.IOException

Throws:

java.io.IOException

bufferLen

private int bufferLen()

hasBufferedData

public boolean hasBufferedData()

truncate

public void truncate()

readAllowed

protected boolean readAllowed()

read

public int read()
         throws java.io.IOException

Overrides:

read in class java.io.FilterInputStream

Throws:

java.io.IOException

read

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

Overrides:

read in class java.io.FilterInputStream

Throws:

java.io.IOException

read

public int read(byte[] b)
         throws java.io.IOException

Overrides:

read in class java.io.FilterInputStream

Throws:

java.io.IOException

markSupported

public boolean markSupported()

Overrides:

markSupported in class java.io.FilterInputStream

readLine

public int readLine(ByteArrayBuffer dst)
             throws MaxLineLimitException,
                    java.io.IOException

Description copied from class: LineReaderInputStream

Reads one line of text into the given ByteArrayBuffer.

Specified by:

readLine in class LineReaderInputStream

Parameters:

dst - Destination

Returns:

number of bytes copied or -1 if the end of the stream has been reached.

Throws:

MaxLineLimitException - if the line exceeds a limit on the line length imposed by a subclass.

java.io.IOException - in case of an I/O error.

indexOf

public int indexOf(byte[] pattern,
                   int off,
                   int len)

Implements quick search algorithm as published by

SUNDAY D.M., 1990, A very fast substring search algorithm, Communications of the ACM . 33(8):132-142.

indexOf

public int indexOf(byte[] pattern)

Implements quick search algorithm as published by

SUNDAY D.M., 1990, A very fast substring search algorithm, Communications of the ACM . 33(8):132-142.

indexOf

public int indexOf(byte b,
                   int off,
                   int len)

indexOf

public int indexOf(byte b)

byteAt

public int byteAt(int pos)

buf

protected byte[] buf()

pos

protected int pos()

limit

protected int limit()

length

protected int length()

capacity

public int capacity()

skip

protected int skip(int n)

clear

private void clear()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

unread

public boolean unread(ByteArrayBuffer buf)

Description copied from class: LineReaderInputStream

Tries to unread the last read line. Implementation may refuse to unread a new buffer until the previous unread one has been competely consumed. Implementations will directly use the byte array backed by buf, so make sure to not alter it anymore once this method has been called.

Specified by:

unread in class LineReaderInputStream

Returns:

true if the unread has been succesfull.