Class VectorFileIterators.LongVectorFileIterator

java.lang.Object

uk.co.parnmatt.vector.util.PrefetchingIterator<long[]>

uk.co.parnmatt.vector.reader.VectorFileIterators.LongVectorFileIterator

All Implemented Interfaces:

AutoCloseable, Iterator<long[]>, Resource<IOException>, Resource.Iterator<long[], IOException>

Enclosing class:

VectorFileIterators

public static final class VectorFileIterators.LongVectorFileIterator
extends PrefetchingIterator<long[]>

Represents an iterator of long vector from a file

Nested Class Summary

Nested classes/interfaces inherited from interface Resource

Resource.Iterable<T,X>, Resource.Iterator<E,X>

Constructor Summary

Constructors

Constructor	Description
LongVectorFileIterator(Path path, Options options)

Method Summary

Modifier and Type	Method	Description
void	close()
protected int	componentBytes()
protected long[]	fetch()
protected long[]	get(int dimensions, ByteBuffer buffer)	Get a vector of the provided dimensions read from buffer

Methods inherited from class PrefetchingIterator

hasNext, next

Methods inherited from class Object

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

Methods inherited from interface Iterator

forEachRemaining, hasNext, next, remove

Constructor Details

LongVectorFileIterator

public LongVectorFileIterator(Path path,
 Options options)
                       throws IOException

Parameters:

path - the path to the file which to read

options - the options to configure the read buffer

Throws:

IOException

Method Details

componentBytes

protected int componentBytes()

Returns:

number of bytes of the array component representation

get

protected long[] get(int dimensions,
 ByteBuffer buffer)

Get a vector of the provided dimensions read from buffer

Parameters:

dimensions - the dimensions of the vector

buffer - the buffer holding the raw vector data

Returns:

the vector of provided dimensions

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Resource<E>

Throws:

IOException

fetch

protected long[] fetch()

Specified by:

fetch in class PrefetchingIterator<E>

Returns:

the next element in the iteration, or null to indicate the end of the iterator