org.modeshape.common.function

Class Predicate<T>

java.lang.Object

org.modeshape.common.function.Predicate<T>

Type Parameters:

T - the type of input for the test(Object) method

public abstract class Predicate<T>
extends Object

A simple predicate that takes a single argument.

Constructor Summary

Constructors

Constructor and Description
Predicate()

Method Summary

Methods

Modifier and Type	Method and Description
static <T> Predicate<T>	always() Return a predicate that is always satisfied.
Predicate<T>	and(Predicate<T> other) Obtain a new predicate that performs the logical AND of this predicate and the supplied predicate.
static <T> Predicate<T>	isEqual(Object obj) Return a predicate that is equivalent to Objects.equals(Object, Object) called with the supplied object and the object passed as a parameter to the test(Object) method.
Predicate<T>	negate() Obtain a new predicate that performs the logical NOT of this predicate.
static <T> Predicate<T>	never() Return a predicate that is never satisfied.
Predicate<T>	or(Predicate<T> other) Obtain a new predicate that performs the logical OR of this predicate and the supplied predicate.
abstract boolean	test(T input)

Methods inherited from class java.lang.Object

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

Constructor Detail

Predicate

public Predicate()

Method Detail

test

public abstract boolean test(T input)

and

public Predicate<T> and(Predicate<T> other)

Obtain a new predicate that performs the logical AND of this predicate and the supplied predicate.

Parameters:

other - the other predicate

Returns:

the composed predicate; never null

or

public Predicate<T> or(Predicate<T> other)

Obtain a new predicate that performs the logical OR of this predicate and the supplied predicate.

Parameters:

other - the other predicate

Returns:

the composed predicate; never null

negate

public Predicate<T> negate()

Obtain a new predicate that performs the logical NOT of this predicate.

Returns:

the composed predicate; never null

never

public static <T> Predicate<T> never()

Return a predicate that is never satisfied.

Returns:

the predicate; never null

always

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

Return a predicate that is always satisfied.

Returns:

the predicate; never null

isEqual

public static <T> Predicate<T> isEqual(Object obj)

Return a predicate that is equivalent to Objects.equals(Object, Object) called with the supplied object and the object passed as a parameter to the test(Object) method.

Parameters:

obj - the object to compare the test parameters

Returns:

the new predicate; never null