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Functional programming for exception handlers.

There is a newer version: 1.9.1

// Part of NoException: https://noexception.machinezoo.com
package com.machinezoo.noexception.optional;

import java.util.function.*;
import lombok.*;

@RequiredArgsConstructor final class FallbackLongUnaryOperator implements LongUnaryOperator {
	private final OptionalLongUnaryOperator inner;
	private final LongSupplier source;
	@Override public long applyAsLong(long operand) {
		return inner.apply(operand).orElseGet(source);
	}
}