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108 lines
3.2 KiB
108 lines
3.2 KiB
/*
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* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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package java.util.function;
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import java.util.Objects;
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/**
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* Represents a predicate (boolean-valued function) of two arguments. This is
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* the two-arity specialization of {@link Predicate}.
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*
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* <p>This is a <a href="package-summary.html">functional interface</a>
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* whose functional method is {@link #test(Object, Object)}.
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*
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* @param <T> the type of the first argument to the predicate
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* @param <U> the type of the second argument the predicate
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*
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* @see Predicate
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* @since 1.8
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*/
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@FunctionalInterface
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public interface BiPredicate<T, U> {
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/**
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* Evaluates this predicate on the given arguments.
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*
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* @param t the first input argument
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* @param u the second input argument
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* @return {@code true} if the input arguments match the predicate,
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* otherwise {@code false}
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*/
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boolean test(T t, U u);
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/**
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* Returns a composed predicate that represents a short-circuiting logical
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* AND of this predicate and another. When evaluating the composed
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* predicate, if this predicate is {@code false}, then the {@code other}
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* predicate is not evaluated.
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*
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* <p>Any exceptions thrown during evaluation of either predicate are relayed
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* to the caller; if evaluation of this predicate throws an exception, the
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* {@code other} predicate will not be evaluated.
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*
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* @param other a predicate that will be logically-ANDed with this
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* predicate
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* @return a composed predicate that represents the short-circuiting logical
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* AND of this predicate and the {@code other} predicate
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* @throws NullPointerException if other is null
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*/
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default BiPredicate<T, U> and(BiPredicate<? super T, ? super U> other) {
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Objects.requireNonNull(other);
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return (T t, U u) -> test(t, u) && other.test(t, u);
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}
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/**
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* Returns a predicate that represents the logical negation of this
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* predicate.
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*
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* @return a predicate that represents the logical negation of this
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* predicate
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*/
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default BiPredicate<T, U> negate() {
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return (T t, U u) -> !test(t, u);
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}
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/**
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* Returns a composed predicate that represents a short-circuiting logical
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* OR of this predicate and another. When evaluating the composed
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* predicate, if this predicate is {@code true}, then the {@code other}
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* predicate is not evaluated.
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*
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* <p>Any exceptions thrown during evaluation of either predicate are relayed
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* to the caller; if evaluation of this predicate throws an exception, the
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* {@code other} predicate will not be evaluated.
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*
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* @param other a predicate that will be logically-ORed with this
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* predicate
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* @return a composed predicate that represents the short-circuiting logical
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* OR of this predicate and the {@code other} predicate
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* @throws NullPointerException if other is null
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*/
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default BiPredicate<T, U> or(BiPredicate<? super T, ? super U> other) {
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Objects.requireNonNull(other);
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return (T t, U u) -> test(t, u) || other.test(t, u);
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}
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}
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