org.tensorics.core.tensor.variance

Class Covariants

java.lang.Object

org.tensorics.core.tensor.variance.Covariants

public final class Covariants
extends java.lang.Object

Utility methods used by classes related to the covariance mechanism

Method Summary

Modifier and Type	Method and Description
static java.lang.Class<?>	contravariantOf(java.lang.Class<?> dimension)
static <C> java.lang.Class<C>	coordinateClassFor(java.lang.Class<? extends Covariant<C>> covariantClass)
static <C,CC extends Covariant<C>> Instantiator<C,CC>	instantiatorFor(java.lang.Class<CC> covariantClass) Retrieves an instantiator, which can create instances of the given covariant class from the bare coordinate instances.
static boolean	isCoContraPair(java.lang.Class<?> leftDimension, java.lang.Class<?> rightDimension)
static boolean	isContravariant(java.lang.Class<?> dimension)
static boolean	isCovariant(java.lang.Class<?> dimension)

Methods inherited from class java.lang.Object

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

Method Detail

instantiatorFor

public static <C,CC extends Covariant<C>> Instantiator<C,CC> instantiatorFor(java.lang.Class<CC> covariantClass)

Retrieves an instantiator, which can create instances of the given covariant class from the bare coordinate instances. The type of the coordinate class (constructor argument for the covariant class) is taken from the generic argument of the passed in class. The returned instantiator is re usable and thread safe.

Parameters:

covariantClass - the type of objects that shall be instantated

Returns:

an instantiator to create instances of the given covariant class

coordinateClassFor

public static <C> java.lang.Class<C> coordinateClassFor(java.lang.Class<? extends Covariant<C>> covariantClass)

isCovariant

public static boolean isCovariant(java.lang.Class<?> dimension)

isContravariant

public static boolean isContravariant(java.lang.Class<?> dimension)

contravariantOf

public static java.lang.Class<?> contravariantOf(java.lang.Class<?> dimension)

isCoContraPair

public static boolean isCoContraPair(java.lang.Class<?> leftDimension,
                                     java.lang.Class<?> rightDimension)