net.ninjacat.smooth.functions

Class Predicates

java.lang.Object

net.ninjacat.smooth.functions.Predicates

public final class Predicates
extends Object

Useful predicates

Method Summary

Modifier and Type	Method and Description
static <T> Predicate<T>	assignableFrom(Class cls) Predicate that evaluates to true if the class being tested is assignable from the given class.
static <T> Predicate<T>	instanceOf(Class cls) Predicate that evaluates to true if the class being tested is assignable to the given class.
static <T> Predicate<T>	isNotNull() Predicate that checks value for null.
static <T> Predicate<T>	isNull() Predicate that checks value for null.
static <T> Predicate<T>	not(Predicate<T> predicate) Inverts result of predicate.

Methods inherited from class java.lang.Object

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

Method Detail

not

public static <T> Predicate<T> not(Predicate<T> predicate)

Inverts result of predicate.

Type Parameters:

T - Value type.

Parameters:

predicate - Predicate to invert result.

Returns:

Inverted predicate.

isNull

public static <T> Predicate<T> isNull()

Predicate that checks value for null.

Type Parameters:

T - Value type.

Returns:

Predicate that returns {code true} if value is null.

isNotNull

public static <T> Predicate<T> isNotNull()

Predicate that checks value for null.

Type Parameters:

T - Value type.

Returns:

Predicate that returns {code true} if value is not null.

instanceOf

public static <T> Predicate<T> instanceOf(Class cls)

Predicate that evaluates to true if the class being tested is assignable to the given class.

Type Parameters:

T - Value type.

Parameters:

cls - Class to be tested against.

Returns:

Predicate that returns {code true} if value can be assigned to class.

assignableFrom

public static <T> Predicate<T> assignableFrom(Class cls)

Predicate that evaluates to true if the class being tested is assignable from the given class.

Type Parameters:

T - Value type.

Parameters:

cls - Class to be tested against.

Returns:

Predicate that returns {code true} if value can be assigned from class.