io.polaris.core.tuple.Ref Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of polaris-core Show documentation

There is a newer version: 3.2.1

package io.polaris.core.tuple;

import java.util.function.Supplier;

/**
 * @author Qt
 * @since 1.8
 */
@FunctionalInterface
public interface Ref extends Tuple {

	V get();

	default V get(Supplier loader) {
		V v = get();
		if (v == null && loader != null) {
			v = loader.get();
		}
		return v;
	}

	static  Ref of(final E value) {
		return new ValueRef<>(value);
	}
}