org.deeplearning4j.datasets.iterator

Class AsyncShieldMultiDataSetIterator

java.lang.Object

org.deeplearning4j.datasets.iterator.AsyncShieldMultiDataSetIterator

All Implemented Interfaces:

Serializable, Iterator<org.nd4j.linalg.dataset.api.MultiDataSet>, org.nd4j.linalg.dataset.api.iterator.MultiDataSetIterator

public class AsyncShieldMultiDataSetIterator
extends Object
implements org.nd4j.linalg.dataset.api.iterator.MultiDataSetIterator

This wrapper takes your existing MultiDataSetIterator implementation and prevents asynchronous prefetch

Author:

[email protected]

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
AsyncShieldMultiDataSetIterator(org.nd4j.linalg.dataset.api.iterator.MultiDataSetIterator iterator)

Method Summary

Modifier and Type	Method and Description
boolean	asyncSupported() /** Does this DataSetIterator support asynchronous prefetching of multiple DataSet objects? PLEASE NOTE: This iterator ALWAYS returns FALSE
org.nd4j.linalg.dataset.api.MultiDataSetPreProcessor	getPreProcessor()
boolean	hasNext() Returns true if the iteration has more elements.
org.nd4j.linalg.dataset.api.MultiDataSet	next() Returns the next element in the iteration.
org.nd4j.linalg.dataset.api.MultiDataSet	next(int num) Fetch the next 'num' examples.
void	remove() Removes from the underlying collection the last element returned by this iterator (optional operation).
void	reset() Resets the iterator back to the beginning
boolean	resetSupported() Is resetting supported by this DataSetIterator? Many DataSetIterators do support resetting, but some don't
void	setPreProcessor(org.nd4j.linalg.dataset.api.MultiDataSetPreProcessor preProcessor) Set the preprocessor to be applied to each MultiDataSet, before each MultiDataSet is returned.

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

Constructor Detail

AsyncShieldMultiDataSetIterator

public AsyncShieldMultiDataSetIterator(@NonNull
                                       org.nd4j.linalg.dataset.api.iterator.MultiDataSetIterator iterator)

Method Detail

next

public org.nd4j.linalg.dataset.api.MultiDataSet next(int num)

Fetch the next 'num' examples. Similar to the next method, but returns a specified number of examples

Specified by:

next in interface org.nd4j.linalg.dataset.api.iterator.MultiDataSetIterator

Parameters:

num - Number of examples to fetch

setPreProcessor

public void setPreProcessor(org.nd4j.linalg.dataset.api.MultiDataSetPreProcessor preProcessor)

Set the preprocessor to be applied to each MultiDataSet, before each MultiDataSet is returned.

Specified by:

setPreProcessor in interface org.nd4j.linalg.dataset.api.iterator.MultiDataSetIterator

Parameters:

preProcessor - MultiDataSetPreProcessor. May be null.

getPreProcessor

public org.nd4j.linalg.dataset.api.MultiDataSetPreProcessor getPreProcessor()

Specified by:

getPreProcessor in interface org.nd4j.linalg.dataset.api.iterator.MultiDataSetIterator

resetSupported

public boolean resetSupported()

Is resetting supported by this DataSetIterator? Many DataSetIterators do support resetting, but some don't

Specified by:

resetSupported in interface org.nd4j.linalg.dataset.api.iterator.MultiDataSetIterator

Returns:

true if reset method is supported; false otherwise

asyncSupported

public boolean asyncSupported()

/** Does this DataSetIterator support asynchronous prefetching of multiple DataSet objects? PLEASE NOTE: This iterator ALWAYS returns FALSE

Specified by:

asyncSupported in interface org.nd4j.linalg.dataset.api.iterator.MultiDataSetIterator

Returns:

true if asynchronous prefetching from this iterator is OK; false if asynchronous prefetching should not be used with this iterator

reset

public void reset()

Resets the iterator back to the beginning

Specified by:

reset in interface org.nd4j.linalg.dataset.api.iterator.MultiDataSetIterator

hasNext

public boolean hasNext()

Returns true if the iteration has more elements. (In other words, returns true if next(int) would return an element rather than throwing an exception.)

Specified by:

hasNext in interface Iterator<org.nd4j.linalg.dataset.api.MultiDataSet>

Returns:

true if the iteration has more elements

next

public org.nd4j.linalg.dataset.api.MultiDataSet next()

Returns the next element in the iteration.

Specified by:

next in interface Iterator<org.nd4j.linalg.dataset.api.MultiDataSet>

Returns:

the next element in the iteration

remove

public void remove()

Removes from the underlying collection the last element returned by this iterator (optional operation). This method can be called only once per call to next(int). The behavior of an iterator is unspecified if the underlying collection is modified while the iteration is in progress in any way other than by calling this method.

Specified by:

remove in interface Iterator<org.nd4j.linalg.dataset.api.MultiDataSet>

Throws:

UnsupportedOperationException - if the remove operation is not supported by this iterator

IllegalStateException - if the next method has not yet been called, or the remove method has already been called after the last call to the next method