org.apache.nifi.stream.io.util

Class AbstractTextDemarcator

java.lang.Object

org.apache.nifi.stream.io.util.AbstractTextDemarcator

All Implemented Interfaces:

Closeable, AutoCloseable

Direct Known Subclasses:

LineDemarcator

public abstract class AbstractTextDemarcator
extends Object
implements Closeable

Field Summary

Fields

Modifier and Type	Field and Description
(package private) int	availableBytesLength
(package private) char[]	buffer
(package private) int	index
private static int	INIT_BUFFER_SIZE
(package private) int	mark
private int	maxDataSize
private Reader	reader

Constructor Summary

Constructors

Constructor and Description
AbstractTextDemarcator(Reader reader, int maxDataSize) Constructs an instance of demarcator with provided InputStream and max buffer size.
AbstractTextDemarcator(Reader reader, int maxDataSize, int initialBufferSize) Constructs an instance of demarcator with provided InputStream and max buffer size and initial buffer size.

Method Summary

Modifier and Type	Method and Description
void	close()
(package private) void	fill() Will fill the current buffer from current 'index' position, expanding it and or shuffling it if necessary.
private void	validate(Reader reader, int maxDataSize, int initialBufferSize) Validates prerequisites for constructor arguments

Methods inherited from class java.lang.Object

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

Field Detail

INIT_BUFFER_SIZE

private static final int INIT_BUFFER_SIZE

See Also:

Constant Field Values

reader

private final Reader reader

maxDataSize

private final int maxDataSize

buffer

char[] buffer

index

int index

mark

int mark

availableBytesLength

int availableBytesLength

Constructor Detail

AbstractTextDemarcator

AbstractTextDemarcator(Reader reader,
                       int maxDataSize)

Constructs an instance of demarcator with provided InputStream and max buffer size. Each demarcated token must fit within max buffer size, otherwise the exception will be raised.

AbstractTextDemarcator

AbstractTextDemarcator(Reader reader,
                       int maxDataSize,
                       int initialBufferSize)

Constructs an instance of demarcator with provided InputStream and max buffer size and initial buffer size. Each demarcated token must fit within max buffer size, otherwise the exception will be raised.

Method Detail

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException

fill

void fill()
   throws IOException

Will fill the current buffer from current 'index' position, expanding it and or shuffling it if necessary. If buffer exceeds max buffer size a BufferOverflowException will be thrown.

Throws:

IOException - if unable to read from the stream

validate

private void validate(Reader reader,
                      int maxDataSize,
                      int initialBufferSize)

Validates prerequisites for constructor arguments