Encryptable YAML for Spring Boot

EncryptablePropertiesPropertySource

public class EncryptablePropertiesPropertySource extends MapPropertySource {

	@SuppressWarnings({ "unchecked", "rawtypes" })
	public EncryptablePropertiesPropertySource(String name, Properties source) {
		super(name, (Map) source);
	}

	protected EncryptablePropertiesPropertySource(String name, Map<String, Object> source) {
		super(name, source);
	}

	@Override
	public Object getProperty(String name) {
		if (StringUtils.startsWithIgnoreCase(name, "encrypted") && !"encrypted.key".equalsIgnoreCase(name)) {
			String key = (String) super.getProperty("encrypted.key");
			String encrypted = (String) super.getProperty(name);
			try {
				return CryptoUtil.decrypt(key, encrypted);
			} catch (GeneralSecurityException e) {
				throw new PropertyDecryptionException(name, e);
			}
		}
		return super.getProperty(name);
	}

}

EncryptedYamlPropertySourceLoader

/**
 * this is loaded by specifying
 * org.springframework.boot.env.PropertySourceLoader in
 * META-INF/spring.factories
 */
public class EncryptedYamlPropertySourceLoader extends YamlPropertySourceLoader implements PriorityOrdered {

	@Override
	public PropertySource<?> load(String name, Resource resource, String profile) throws IOException {
		if (ClassUtils.isPresent("org.yaml.snakeyaml.Yaml", null)) {
			Processor processor = new Processor(resource, profile);
			Map<String, Object> source = processor.process();
			if (!source.isEmpty()) {
				return new EncryptablePropertiesPropertySource(name, source);
			}
		}
		return null;
	}

	/**
	 * {@link YamlProcessor} to create a {@link Map} containing the property
	 * values. Similar to {@link YamlPropertiesFactoryBean} but retains the
	 * order of entries.
	 */
	private static class Processor extends YamlProcessor {

		public Processor(Resource resource, String profile) {
			if (profile == null) {
				setMatchDefault(true);
				setDocumentMatchers(new SpringProfileDocumentMatcher());
			} else {
				setMatchDefault(false);
				setDocumentMatchers(new SpringProfileDocumentMatcher(profile));
			}
			setResources(new Resource[] { resource });
		}

		public Map<String, Object> process() {
			final Map<String, Object> result = new LinkedHashMap<>();
			process(new MatchCallback() {
				@Override
				public void process(Properties properties, Map<String, Object> map) {
					result.putAll(getFlattenedMap(map));
				}
			});
			return result;
		}

	}

	@Override
	public int getOrder() {
		return Ordered.HIGHEST_PRECEDENCE;
	}
}