org.apache.giraph.utils

Class ByteStructIterator<T extends org.apache.hadoop.io.Writable>

java.lang.Object

org.apache.giraph.utils.ByteStructIterator<T>

Type Parameters:

T - Type that extends Writable that will be iterated

All Implemented Interfaces:

Iterator<T>

Direct Known Subclasses:

RepresentativeByteStructIterator

public abstract class ByteStructIterator<T extends org.apache.hadoop.io.Writable>
extends Object
implements Iterator<T>

This iterator is designed to deserialize a byte array on the fly to provide new copies of writable objects when desired. It does not reuse objects, and instead creates a new one for every next().

Field Summary

Fields

Modifier and Type	Field and Description
protected ExtendedDataInput	extendedDataInput Data input

Constructor Summary

Constructors

Constructor and Description
ByteStructIterator(ExtendedDataInput extendedDataInput) Wrap ExtendedDataInput in ByteArrayIterator

Method Summary

Modifier and Type	Method and Description
protected abstract T	createWritable() Must be able to create the writable object
boolean	hasNext()
T	next()
void	remove()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Field Detail

extendedDataInput

protected final ExtendedDataInput extendedDataInput

Data input

Constructor Detail

ByteStructIterator

public ByteStructIterator(ExtendedDataInput extendedDataInput)

Wrap ExtendedDataInput in ByteArrayIterator

Parameters:

extendedDataInput - ExtendedDataInput

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<T extends org.apache.hadoop.io.Writable>

next

public T next()

Specified by:

next in interface Iterator<T extends org.apache.hadoop.io.Writable>

remove

public void remove()

Specified by:

remove in interface Iterator<T extends org.apache.hadoop.io.Writable>

createWritable

protected abstract T createWritable()

Must be able to create the writable object

Returns:

New writable