ClassNameFilter Type — spring-boot Architecture

Source Code

core/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/condition/FilteringSpringBootCondition.java lines 123–158

	protected enum ClassNameFilter {

		PRESENT {

			@Override
			public boolean matches(String className, @Nullable ClassLoader classLoader) {
				return isPresent(className, classLoader);
			}

		},

		MISSING {

			@Override
			public boolean matches(String className, @Nullable ClassLoader classLoader) {
				return !isPresent(className, classLoader);
			}

		};

		abstract boolean matches(String className, @Nullable ClassLoader classLoader);

		private static boolean isPresent(String className, @Nullable ClassLoader classLoader) {
			if (classLoader == null) {
				classLoader = ClassUtils.getDefaultClassLoader();
			}
			try {
				resolve(className, classLoader);
				return true;
			}
			catch (Throwable ex) {
				return false;
			}
		}

	}