OriginLookup Type — spring-boot Architecture

Source Code

core/spring-boot/src/main/java/org/springframework/boot/origin/OriginLookup.java lines 29–62

@FunctionalInterface
public interface OriginLookup<K> {

	/**
	 * Return the origin of the given key or {@code null} if the origin cannot be
	 * determined.
	 * @param key the key to lookup
	 * @return the origin of the key or {@code null}
	 */
	@Nullable Origin getOrigin(K key);

	/**
	 * Attempt to look up the origin from the given source. If the source is not a
	 * {@link OriginLookup} or if an exception occurs during lookup then {@code null} is
	 * returned.
	 * @param source the source object
	 * @param key the key to lookup
	 * @param <K> the key type
	 * @return an {@link Origin} or {@code null}
	 */
	@SuppressWarnings("unchecked")
	static <K> @Nullable Origin getOrigin(@Nullable Object source, K key) {
		if (!(source instanceof OriginLookup)) {
			return null;
		}
		try {
			return ((OriginLookup<K>) source).getOrigin(key);
		}
		catch (Throwable ex) {
			return null;
		}
	}

}