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package Torello.Java.Function;

/**
 * Function-Pointer
 * <SPAN CLASS=TJF>Input:</SPAN> {@code float}
 * <SPAN CLASS=TJF>Output:</SPAN> {@code boolean}.
 * 
 * <BR /><BR />
 * This is similar to Java's {@code IntPredicate}, except it explicity requires a {@code float}
 * type in it's lambda {@code 'test'} method.
 */
@FunctionalInterface
public interface FloatPredicate
{
    /**
     * Evaluates this predicate on the given argument.
     * <BR /><BR /><EMBED CLASS='external-html' DATA-FILE-ID=FUNC_INTER_METH>
     *
     * @param f primitive-{@code float} input argument.
     * @return {@code TRUE} if the input argument matches this predicate, and <B>FALSE</B> otherwise.
     */
    public boolean test(float f);

    /**
     * <EMBED CLASS='external-html' DATA-FILE-ID=PRED_AND_METHOD>
     * @param other A predicate that will be logically-AND'ed with this predicate
     * @return <EMBED CLASS='external-html' DATA-FILE-ID=PRED_AND_RETURN>
     * @throws NullPointerException if parameter {@code 'other'} is null.
     */
    default FloatPredicate and(FloatPredicate other)
    {
        if (other == null)
            throw new NullPointerException("null has been passed to parameter 'other'");

        return (float f) -> this.test(f) && other.test(f);
    }

    /**
     * <EMBED CLASS='external-html' DATA-FILE-ID=PRED_NEGATE_METHOD>
     * @return <EMBED CLASS='external-html' DATA-FILE-ID=PRED_NEGATE_RETURN>
     */
    default FloatPredicate negate()
    { return (float f) -> ! this.test(f); }

    /**
     * <EMBED CLASS='external-html' DATA-FILE-ID=PRED_OR_METHOD>
     * @param other a predicate that will be logically-ORed with this predicate
     * @return <EMBED CLASS='external-html' DATA-FILE-ID=PRED_OR_RETURN>
     * @throws NullPointerException if parameter {@code 'other'} is null.
     */
    default FloatPredicate or(FloatPredicate other)
    {
        if (other == null)
            throw new NullPointerException("null has been passed to parameter 'other'");

        return (float f) -> this.test(f) || other.test(f);
    }
}