ConfigurationPropertyState Type — spring-boot Architecture

Source Code

core/spring-boot/src/main/java/org/springframework/boot/context/properties/source/ConfigurationPropertyState.java lines 29–92

public enum ConfigurationPropertyState {

	/**
	 * The {@link ConfigurationPropertySource} has at least one matching
	 * {@link ConfigurationProperty}.
	 */
	PRESENT,

	/**
	 * The {@link ConfigurationPropertySource} has no matching
	 * {@link ConfigurationProperty ConfigurationProperties}.
	 */
	ABSENT,

	/**
	 * It's not possible to determine if {@link ConfigurationPropertySource} has matching
	 * {@link ConfigurationProperty ConfigurationProperties} or not.
	 */
	UNKNOWN;

	/**
	 * Search the given iterable using a predicate to determine if content is
	 * {@link #PRESENT} or {@link #ABSENT}.
	 * @param <T> the data type
	 * @param source the source iterable to search
	 * @param predicate the predicate used to test for presence
	 * @return {@link #PRESENT} if the iterable contains a matching item, otherwise
	 * {@link #ABSENT}.
	 */
	static <T> ConfigurationPropertyState search(Iterable<T> source, Predicate<T> predicate) {
		Assert.notNull(source, "'source' must not be null");
		Assert.notNull(predicate, "'predicate' must not be null");
		for (T item : source) {
			if (predicate.test(item)) {
				return PRESENT;
			}
		}
		return ABSENT;
	}

	/**
	 * Search the given iterable using a predicate to determine if content is
	 * {@link #PRESENT} or {@link #ABSENT}.
	 * @param <T> the data type
	 * @param source the source iterable to search
	 * @param startInclusive the first index to cover
	 * @param endExclusive index immediately past the last index to cover
	 * @param predicate the predicate used to test for presence
	 * @return {@link #PRESENT} if the iterable contains a matching item, otherwise
	 * {@link #ABSENT}.
	 */
	static <T> ConfigurationPropertyState search(T[] source, int startInclusive, int endExclusive,
			Predicate<T> predicate) {
		Assert.notNull(source, "'source' must not be null");
		Assert.notNull(predicate, "'predicate' must not be null");
		for (int i = startInclusive; i < endExclusive; i++) {
			if (predicate.test(source[i])) {
				return PRESENT;
			}
		}
		return ABSENT;
	}

}