Package com.apple.foundationdb.linear

Class Transformed.UnderlyingLens<V extends RealVector>

java.lang.Object

com.apple.foundationdb.linear.Transformed.UnderlyingLens<V>

Type Parameters:

V - type parameter for vector class

All Implemented Interfaces:

Lens<Transformed<V>,V>

Enclosing class:

Transformed<V extends RealVector>

public static class Transformed.UnderlyingLens<V extends RealVector>
extends Object
implements Lens<Transformed<V>,V>

Lens to access the underlying vector of a transformed vector in logic that can be called for containers of both vectors and transformed vectors.

Constructor Summary

Constructors

Constructor	Description
UnderlyingLens()

Method Summary

Modifier and Type	Method	Description
V	get(Transformed<V> transformedVector)	Extracts the focused attribute from c.
Transformed<V>	identityTransform(V v)
Transformed<V>	set(Transformed<V> ignored, V v)	Returns a container equivalent to c but with the focused attribute set to a.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.apple.foundationdb.util.Lens

compose, getNonnull, map, wrap

Constructor Details

UnderlyingLens

public UnderlyingLens()

Method Details

get

@Nullable
public V get(@Nonnull
 Transformed<V> transformedVector)

Description copied from interface: Lens

Extracts the focused attribute from c.

Specified by:

get in interface Lens<Transformed<V extends RealVector>,V extends RealVector>

Parameters:

transformedVector - the container; must not be null

Returns:

the attribute, or null if the implementation models an absent attribute

set

@Nonnull
public Transformed<V> set(@Nullable
 Transformed<V> ignored,
 @Nullable
 V v)

Description copied from interface: Lens

Returns a container equivalent to c but with the focused attribute set to a. Passing null for c signals "no existing container, build a fresh one around a" — implementations are expected to handle this case, typically with a default for the unfocused parts of the container.

Specified by:

set in interface Lens<Transformed<V extends RealVector>,V extends RealVector>

Parameters:

ignored - the existing container to update, or null to construct a fresh one

v - the new value of the focused attribute; may be null if the implementation supports containers without the attribute

Returns:

a non-null container with the attribute set to a

identityTransform

@Nonnull
public Transformed<V> identityTransform(@Nullable
 V v)