AutoConfigurationClasses Class — spring-boot Architecture

Source Code

core/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/AutoConfigurationSorter.java lines 119–169

	private class AutoConfigurationClasses {

		private final Map<String, AutoConfigurationClass> classes = new LinkedHashMap<>();

		AutoConfigurationClasses(MetadataReaderFactory metadataReaderFactory,
				@Nullable AutoConfigurationMetadata autoConfigurationMetadata, Collection<String> classNames) {
			addToClasses(metadataReaderFactory, autoConfigurationMetadata, classNames, true);
		}

		Set<String> getAllNames() {
			return this.classes.keySet();
		}

		private void addToClasses(MetadataReaderFactory metadataReaderFactory,
				@Nullable AutoConfigurationMetadata autoConfigurationMetadata, Collection<String> classNames,
				boolean required) {
			for (String className : classNames) {
				if (!this.classes.containsKey(className)) {
					AutoConfigurationClass autoConfigurationClass = new AutoConfigurationClass(className,
							metadataReaderFactory, autoConfigurationMetadata);
					boolean available = autoConfigurationClass.isAvailable();
					if (required || available) {
						this.classes.put(className, autoConfigurationClass);
					}
					if (available) {
						addToClasses(metadataReaderFactory, autoConfigurationMetadata,
								autoConfigurationClass.getBefore(), false);
						addToClasses(metadataReaderFactory, autoConfigurationMetadata,
								autoConfigurationClass.getAfter(), false);
					}
				}
			}
		}

		AutoConfigurationClass get(String className) {
			AutoConfigurationClass autoConfigurationClass = this.classes.get(className);
			Assert.state(autoConfigurationClass != null, "'autoConfigurationClass' must not be null");
			return autoConfigurationClass;
		}

		Set<String> getClassesRequestedAfter(String className) {
			Set<String> classesRequestedAfter = new LinkedHashSet<>(get(className).getAfter());
			this.classes.forEach((name, autoConfigurationClass) -> {
				if (autoConfigurationClass.getBefore().contains(className)) {
					classesRequestedAfter.add(name);
				}
			});
			return classesRequestedAfter;
		}

	}