Package org.aksw.commons.io.input

Class ReadableChannelWithConditionalBound<A,X extends ReadableChannel<A>>

java.lang.Object

org.aksw.commons.util.closeable.AutoCloseableWrapperBase<T>

org.aksw.commons.io.shared.ChannelDecoratorBase<X>

org.aksw.commons.io.input.ReadableChannelDecoratorBase<A,X>

org.aksw.commons.io.input.ReadableChannelWithCounter<A,X>

org.aksw.commons.io.input.ReadableChannelWithConditionalBound<A,X>

All Implemented Interfaces:

Closeable, AutoCloseable, Channel, HasArrayOps<A>, ReadableChannel<A>, ReadableSource<A>

public class ReadableChannelWithConditionalBound<A,X extends ReadableChannel<A>>
extends ReadableChannelWithCounter<A,X>

Readable channel wrapper that before every read checks for an end-of-file (eof) condition. Once true, any subsequent read immediately returns -1 (eof). Used to prevent reading across hadoop split boundaries

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	isInEofState
protected Predicate<? super ReadableChannelWithConditionalBound<A,X>>	testForEof

Fields inherited from class org.aksw.commons.io.input.ReadableChannelWithCounter

count

Fields inherited from class org.aksw.commons.util.closeable.AutoCloseableWrapperBase

delegate

Constructor Summary

Constructors

Constructor	Description
ReadableChannelWithConditionalBound(X delegate, Predicate<? super ReadableChannelWithConditionalBound<A,X>> testForEof)

Method Summary

Modifier and Type	Method	Description
int	read(A array, int position, int length)	Read method following the usual InputStream protocol.

Methods inherited from class org.aksw.commons.io.input.ReadableChannelWithCounter

getDelegate, getReadCount

Methods inherited from class org.aksw.commons.io.input.ReadableChannelDecoratorBase

getArrayOps

Methods inherited from class org.aksw.commons.io.shared.ChannelDecoratorBase

close, isOpen

Methods inherited from class org.aksw.commons.util.closeable.AutoCloseableWrapperBase

close

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.nio.channels.Channel

close, isOpen

Methods inherited from interface org.aksw.commons.io.input.ReadableSource

readRaw

Field Details

testForEof

protected Predicate<? super ReadableChannelWithConditionalBound<A,X extends ReadableChannel<A>>> testForEof

isInEofState

protected boolean isInEofState

Constructor Details

ReadableChannelWithConditionalBound

public ReadableChannelWithConditionalBound(X delegate,
 Predicate<? super ReadableChannelWithConditionalBound<A,X>> testForEof)

Method Details

read

public int read(A array,
 int position,
 int length)
         throws IOException

Description copied from interface: ReadableSource

Read method following the usual InputStream protocol.

Specified by:

read in interface ReadableSource<A>

Overrides:

read in class ReadableChannelWithCounter<A,X extends ReadableChannel<A>>

Parameters:

array - The array into which to put the read data

position - Offset into array where to start writing

length - Maximum number of items to read.

Returns:

The number of items read. Return -1 if end of data was reached, and 0 iff length was 0.

Throws:

IOException