LambdaSafe Class — spring-boot Architecture

Source Code

core/spring-boot/src/main/java/org/springframework/boot/util/LambdaSafe.java lines 45–77

public final class LambdaSafe {

	private static final @Nullable Method CLASS_GET_MODULE;

	private static final @Nullable Method MODULE_GET_NAME;

	static {
		CLASS_GET_MODULE = ReflectionUtils.findMethod(Class.class, "getModule");
		MODULE_GET_NAME = (CLASS_GET_MODULE != null)
				? ReflectionUtils.findMethod(CLASS_GET_MODULE.getReturnType(), "getName") : null;
	}

	private LambdaSafe() {
	}

	/**
	 * Start a call to a single callback instance, dealing with common generic type
	 * concerns and exceptions.
	 * @param callbackType the callback type (a {@link FunctionalInterface functional
	 * interface})
	 * @param callbackInstance the callback instance (may be a lambda)
	 * @param argument the primary argument passed to the callback
	 * @param additionalArguments any additional arguments passed to the callback
	 * @param <C> the callback type
	 * @param <A> the primary argument type
	 * @return a {@link Callback} instance that can be invoked.
	 */
	public static <C, A> Callback<C, A> callback(Class<C> callbackType, C callbackInstance, A argument,
			@Nullable Object @Nullable ... additionalArguments) {
		Assert.notNull(callbackType, "'callbackType' must not be null");
		Assert.notNull(callbackInstance, "'callbackInstance' must not be null");
		return new Callback<>(callbackType, callbackInstance, argument, additionalArguments);
	}