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package java.util.function;

import java.util.Objects;

/**
 * Represents a predicate (boolean-valued function) of one {@code double}-valued
 * argument. This is the {@code double}-consuming primitive type specialization
 * of {@link Predicate}.
 *
 * <p>This is a <a href="package-summary.html">functional interface</a>
 * whose functional method is {@link #test(double)}.
 *
 * @see Predicate
 * @since 1.8
 */
@FunctionalInterface
public interface DoublePredicate {

 /**
 * Evaluates this predicate on the given argument.
 *
 * @param value the input argument
 * @return {@code true} if the input argument matches the predicate,
 * otherwise {@code false}
 */
 boolean test(double value);

 /**
 * Returns a composed predicate that represents a short-circuiting logical
 * AND of this predicate and another. When evaluating the composed
 * predicate, if this predicate is {@code false}, then the {@code other}
 * predicate is not evaluated.
 *
 * <p>Any exceptions thrown during evaluation of either predicate are relayed
 * to the caller; if evaluation of this predicate throws an exception, the
 * {@code other} predicate will not be evaluated.
 *
 * @param other a predicate that will be logically-ANDed with this
 * predicate
 * @return a composed predicate that represents the short-circuiting logical
 * AND of this predicate and the {@code other} predicate
 * @throws NullPointerException if other is null
 */
 default DoublePredicate and(DoublePredicate other) {
 Objects.requireNonNull(other);
 return (value) -> test(value) && other.test(value);
 }

 /**
 * Returns a predicate that represents the logical negation of this
 * predicate.
 *
 * @return a predicate that represents the logical negation of this
 * predicate
 */
 default DoublePredicate negate() {
 return (value) -> !test(value);
 }

 /**
 * Returns a composed predicate that represents a short-circuiting logical
 * OR of this predicate and another. When evaluating the composed
 * predicate, if this predicate is {@code true}, then the {@code other}
 * predicate is not evaluated.
 *
 * <p>Any exceptions thrown during evaluation of either predicate are relayed
 * to the caller; if evaluation of this predicate throws an exception, the
 * {@code other} predicate will not be evaluated.
 *
 * @param other a predicate that will be logically-ORed with this
 * predicate
 * @return a composed predicate that represents the short-circuiting logical
 * OR of this predicate and the {@code other} predicate
 * @throws NullPointerException if other is null
 */
 default DoublePredicate or(DoublePredicate other) {
 Objects.requireNonNull(other);
 return (value) -> test(value) || other.test(value);
 }
}