org.tensorics.core.tensor.stream

Class TensorStreams

java.lang.Object

org.tensorics.core.tensor.stream.TensorStreams

public final class TensorStreams
extends java.lang.Object

Utility class for producing streams of Entry<Position, T> out of Tensors and collecting them back into Tensors.

Method Summary

Modifier and Type	Method and Description
static <T,CI,CO> java.util.function.Function<java.util.Map.Entry<Position,T>,java.util.Map.Entry<Position,T>>	coordinatesOfType(java.lang.Class<CI> dimension, java.util.function.Function<CI,CO> coordinateMapper)
static <T> java.util.function.Function<java.util.Map.Entry<Position,T>,java.util.Map.Entry<Position,T>>	positions(java.util.function.BiFunction<Position,T,Position> positionMapper)
static <T> java.util.function.Function<java.util.Map.Entry<Position,T>,java.util.Map.Entry<Position,T>>	positions(java.util.function.Function<Position,Position> positionMapper)
static <S> java.util.stream.Stream<java.util.Map.Entry<Position,S>>	tensorEntryStream(Tensor<S> tensor) Return a stream of all entries of the tensor
static <V,T> TensorCollector<V,T>	toTensor(java.util.function.Function<V,Position> positionMapper, java.util.function.Function<V,T> valueMapper, java.util.Set<java.lang.Class<?>> dimensions) Build a collector to collect an arbitrary stream to a generic Tensor<T> of the given dimensions.
static <T> TensorCollector<java.util.Map.Entry<Position,T>,T>	toTensor(java.util.Set<java.lang.Class<?>> dimensions) Build a collector to collect a stream of Entry<Position,T> to a generic Tensor<T> of the dimensions defined in the set of classes.
static <T,TB extends Tensorbacked<T>> TensorbackedCollector<java.util.Map.Entry<Position,T>,T,TB>	toTensorbacked(java.lang.Class<TB> tensorBackedClass) Build a collector to collect a stream of Entry<Position,T> to a Tensorbacked<T> class.
static <V,T,TB extends Tensorbacked<T>> TensorbackedCollector<V,T,TB>	toTensorbacked(java.lang.Class<TB> tensorBackedClass, java.util.function.Function<V,Position> positionMapper, java.util.function.Function<V,T> valueMapper) Build a collector to collect an arbitrary stream to a Tensorbackedclass.
static <I,O> java.util.function.Function<java.util.Map.Entry<Position,I>,java.util.Map.Entry<Position,O>>	values(java.util.function.BiFunction<Position,I,O> valueMapper)
static <I,O> java.util.function.Function<java.util.Map.Entry<Position,I>,java.util.Map.Entry<Position,O>>	values(java.util.function.Function<I,O> valueMapper)

Methods inherited from class java.lang.Object

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

Method Detail

tensorEntryStream

public static <S> java.util.stream.Stream<java.util.Map.Entry<Position,S>> tensorEntryStream(Tensor<S> tensor)

Return a stream of all entries of the tensor

Parameters:

tensor -

Returns:

toTensor

public static <T> TensorCollector<java.util.Map.Entry<Position,T>,T> toTensor(java.util.Set<java.lang.Class<?>> dimensions)

Build a collector to collect a stream of Entry<Position,T> to a generic Tensor<T> of the dimensions defined in the set of classes.

Parameters:

dimensions - the dimensions of the tensor to construct

Returns:

toTensor

public static <V,T> TensorCollector<V,T> toTensor(java.util.function.Function<V,Position> positionMapper,
                                                  java.util.function.Function<V,T> valueMapper,
                                                  java.util.Set<java.lang.Class<?>> dimensions)

Build a collector to collect an arbitrary stream to a generic Tensor<T> of the given dimensions. Functions mapping the values to Position and T must be provided.

Parameters:

positionMapper - function mapping stream values to Position

valueMapper - function mapping stream values to tensor values

dimensions - the dimensions of the tensor to construct

Returns:

toTensorbacked

public static <T,TB extends Tensorbacked<T>> TensorbackedCollector<java.util.Map.Entry<Position,T>,T,TB> toTensorbacked(java.lang.Class<TB> tensorBackedClass)

Build a collector to collect a stream of Entry<Position,T> to a Tensorbacked<T> class. The Positions in the stream must be consistent with the dimensions of the Tensorbacked.

Parameters:

tensorBackedClass - the tensorbacked to produce

Returns:

toTensorbacked

public static <V,T,TB extends Tensorbacked<T>> TensorbackedCollector<V,T,TB> toTensorbacked(java.lang.Class<TB> tensorBackedClass,
                                                                                            java.util.function.Function<V,Position> positionMapper,
                                                                                            java.util.function.Function<V,T> valueMapper)

Build a collector to collect an arbitrary stream to a Tensorbackedclass. Functions mapping the values to Position and T must be provided. The Positions generated must be consistent with the dimensions of the Tensorbacked.

Parameters:

tensorBackedClass - the tensorbacked to produce

positionMapper - function mapping stream values to Position

valueMapper - function mapping stream values to tensor values

Returns:

coordinatesOfType

public static <T,CI,CO> java.util.function.Function<java.util.Map.Entry<Position,T>,java.util.Map.Entry<Position,T>> coordinatesOfType(java.lang.Class<CI> dimension,
                                                                                                                                       java.util.function.Function<CI,CO> coordinateMapper)

positions

public static <T> java.util.function.Function<java.util.Map.Entry<Position,T>,java.util.Map.Entry<Position,T>> positions(java.util.function.Function<Position,Position> positionMapper)

values

public static <I,O> java.util.function.Function<java.util.Map.Entry<Position,I>,java.util.Map.Entry<Position,O>> values(java.util.function.Function<I,O> valueMapper)

positions

public static <T> java.util.function.Function<java.util.Map.Entry<Position,T>,java.util.Map.Entry<Position,T>> positions(java.util.function.BiFunction<Position,T,Position> positionMapper)

values

public static <I,O> java.util.function.Function<java.util.Map.Entry<Position,I>,java.util.Map.Entry<Position,O>> values(java.util.function.BiFunction<Position,I,O> valueMapper)