private void loadDepEnvironments(org.springframework.core.env.Environment environment, CompositePropertySource composite, String state) {
    depApplications.forEach(dep -> {
        ConfigClientProperties properties = this.defaultProperties.override(environment);
        properties.setName(dep.getApplicationName());
        RestTemplate restTemplate = this.restTemplate == null ? getSecureRestTemplate(properties) : this.restTemplate;
        Environment result = getRemoteEnvironment(restTemplate, properties, "master", state);
        if (result != null) {
            logger.info(String.format("Located environment: name=%s, profiles=%s, label=%s, version=%s, state=%s",
                    result.getName(),
                    result.getProfiles() == null ? "" : Arrays.asList(result.getProfiles()),
                    result.getLabel(), result.getVersion(), result.getState()));

            processApplicationResult(composite, result);
        }
    });
}
 

private static void addOrUpdateRemoteConfig(Environment env, boolean isUpdateOrNot) {
    StandardEnvironment environment = (StandardEnvironment) env;
    PropertySource propertySource = environment.getPropertySources().get("bootstrapProperties");
    if(propertySource == null) {
        return;
    }
    CompositePropertySource source = (CompositePropertySource) propertySource;
    for (String key: source.getPropertyNames()) {
        Object val = source.getProperty(key);
        if(val == null) {
            continue;
        }
        if(isUpdateOrNot) {
            logger.info("update remote config => " + key + " = " + source.getProperty(key));
            BDPConfiguration.set(key, val.toString());
        } else {
            logger.info("add remote config => " + key + " = " + source.getProperty(key));
            BDPConfiguration.setIfNotExists(key, val.toString());
        }
    }
}
 

/**
 * Add, remove or re-order any {@link PropertySource}s in this application's
 * environment.
 * @param environment this application's environment
 * @param args arguments passed to the {@code run} method
 * @see #configureEnvironment(ConfigurableEnvironment, String[])
 */
protected void configurePropertySources(ConfigurableEnvironment environment,
		String[] args) {
	MutablePropertySources sources = environment.getPropertySources();
	if (this.defaultProperties != null && !this.defaultProperties.isEmpty()) {
		sources.addLast(
				new MapPropertySource("defaultProperties", this.defaultProperties));
	}
	if (this.addCommandLineProperties && args.length > 0) {
		String name = CommandLinePropertySource.COMMAND_LINE_PROPERTY_SOURCE_NAME;
		if (sources.contains(name)) {
			PropertySource<?> source = sources.get(name);
			CompositePropertySource composite = new CompositePropertySource(name);
			composite.addPropertySource(new SimpleCommandLinePropertySource(
					"springApplicationCommandLineArgs", args));
			composite.addPropertySource(source);
			sources.replace(name, composite);
		}
		else {
			sources.addFirst(new SimpleCommandLinePropertySource(args));
		}
	}
}
 

/**
 * load configuration of application.
 */
private void loadApplicationConfiguration(
		CompositePropertySource compositePropertySource, String dataIdPrefix,
		NacosConfigProperties properties, Environment environment) {
	String fileExtension = properties.getFileExtension();
	String nacosGroup = properties.getGroup();
	// load directly once by default
	loadNacosDataIfPresent(compositePropertySource, dataIdPrefix, nacosGroup,
			fileExtension, true);
	// load with suffix, which have a higher priority than the default
	loadNacosDataIfPresent(compositePropertySource,
			dataIdPrefix + DOT + fileExtension, nacosGroup, fileExtension, true);
	// Loaded with profile, which have a higher priority than the suffix
	for (String profile : environment.getActiveProfiles()) {
		String dataId = dataIdPrefix + SEP1 + profile + DOT + fileExtension;
		loadNacosDataIfPresent(compositePropertySource, dataId, nacosGroup,
				fileExtension, true);
	}

}
 

/**
 * Get property names from {@link EnumerablePropertySource}, and get property value from {@link ConfigurableEnvironment#getProperty(String)}
 */
private void getProperties(ConfigurableEnvironment environment, PropertySource<?> propertySource,
    Map<String, Object> configFromSpringBoot) {
  if (propertySource instanceof CompositePropertySource) {
    // recursively get EnumerablePropertySource
    CompositePropertySource compositePropertySource = (CompositePropertySource) propertySource;
    compositePropertySource.getPropertySources().forEach(ps -> getProperties(environment, ps, configFromSpringBoot));
    return;
  }
  if (propertySource instanceof EnumerablePropertySource) {
    EnumerablePropertySource<?> enumerablePropertySource = (EnumerablePropertySource<?>) propertySource;
    for (String propertyName : enumerablePropertySource.getPropertyNames()) {
      try {
        configFromSpringBoot.put(propertyName, environment.getProperty(propertyName, Object.class));
      } catch (Exception e) {
        throw new RuntimeException(
            "set up spring property source failed.If you still want to start up the application and ignore errors, you can set servicecomb.config.ignoreResolveFailure to true.",
            e);
      }
    }
    return;
  }

  LOGGER.debug("a none EnumerablePropertySource is ignored, propertySourceName = [{}]", propertySource.getName());
}
 

/**
 * Initialize Apollo Configurations Just after environment is ready.
 *
 * @param environment
 */
protected void initialize(ConfigurableEnvironment environment) {

  if (environment.getPropertySources().contains(PropertySourcesConstants.APOLLO_BOOTSTRAP_PROPERTY_SOURCE_NAME)) {
    //already initialized
    return;
  }

  String namespaces = environment.getProperty(PropertySourcesConstants.APOLLO_BOOTSTRAP_NAMESPACES, ConfigConsts.NAMESPACE_APPLICATION);
  logger.debug("Apollo bootstrap namespaces: {}", namespaces);
  List<String> namespaceList = NAMESPACE_SPLITTER.splitToList(namespaces);

  CompositePropertySource composite = new CompositePropertySource(PropertySourcesConstants.APOLLO_BOOTSTRAP_PROPERTY_SOURCE_NAME);
  for (String namespace : namespaceList) {
    Config config = ConfigService.getConfig(namespace);

    composite.addPropertySource(configPropertySourceFactory.getConfigPropertySource(namespace, config));
  }

  environment.getPropertySources().addFirst(composite);
}
 

/**
 * Returns a list of MapPropertySource that correspond to the current state of the
 * system. This only handles the PropertySource objects that are returned.
 * @param propertySourceLocator Spring's property source locator
 * @param environment Spring environment
 * @return a list of MapPropertySource that correspond to the current state of the
 * system
 */
protected List<MapPropertySource> locateMapPropertySources(
		PropertySourceLocator propertySourceLocator, Environment environment) {

	List<MapPropertySource> result = new ArrayList<>();
	PropertySource propertySource = propertySourceLocator.locate(environment);
	if (propertySource instanceof MapPropertySource) {
		result.add((MapPropertySource) propertySource);
	}
	else if (propertySource instanceof CompositePropertySource) {
		result.addAll(((CompositePropertySource) propertySource).getPropertySources()
				.stream().filter(p -> p instanceof MapPropertySource)
				.map(p -> (MapPropertySource) p).collect(Collectors.toList()));
	}
	else {
		this.log.debug("Found property source that cannot be handled: "
				+ propertySource.getClass());
	}

	return result;
}
 

@Override
public PropertySource locate(Environment environment) {
	if (environment instanceof ConfigurableEnvironment) {
		ConfigurableEnvironment env = (ConfigurableEnvironment) environment;

		List<ConfigMapConfigProperties.NormalizedSource> sources = this.properties
				.determineSources();
		CompositePropertySource composite = new CompositePropertySource(
				"composite-configmap");
		if (this.properties.isEnableApi()) {
			sources.forEach(s -> composite.addFirstPropertySource(
					getMapPropertySourceForSingleConfigMap(env, s)));
		}

		addPropertySourcesFromPaths(environment, composite);

		return composite;
	}
	return null;
}
 

@Override
public PropertySource locate(Environment environment) {
	if (environment instanceof ConfigurableEnvironment) {
		ConfigurableEnvironment env = (ConfigurableEnvironment) environment;

		List<SecretsConfigProperties.NormalizedSource> sources = this.properties
				.determineSources();
		CompositePropertySource composite = new CompositePropertySource(
				"composite-secrets");
		if (this.properties.isEnableApi()) {
			sources.forEach(s -> composite.addFirstPropertySource(
					getKubernetesPropertySourceForSingleSecret(env, s)));
		}

		// read for secrets mount
		putPathConfig(composite);

		return composite;
	}
	return null;
}
 

/**
 * Finds all registered property sources of the given type.
 */
protected <S extends PropertySource<?>> List<S> findPropertySources(Class<S> sourceClass) {
    List<S> managedSources = new LinkedList<>();

    LinkedList<PropertySource<?>> sources = toLinkedList(environment.getPropertySources());
    while (!sources.isEmpty()) {
        PropertySource<?> source = sources.pop();
        if (source instanceof CompositePropertySource) {
            CompositePropertySource comp = (CompositePropertySource) source;
            sources.addAll(comp.getPropertySources());
        } else if (sourceClass.isInstance(source)) {
            managedSources.add(sourceClass.cast(source));
        }
    }

    return managedSources;
}
 

@Test
public void shouldLocateLeaseAwareSources() {

	RequestedSecret rotating = RequestedSecret.rotating("secret/rotating");
	DefaultSecretBackendConfigurer configurer = new DefaultSecretBackendConfigurer();
	configurer.add(rotating);
	configurer.add("database/mysql/creds/readonly");

	this.propertySourceLocator = new LeasingVaultPropertySourceLocator(
			new VaultProperties(), configurer, this.secretLeaseContainer);

	PropertySource<?> propertySource = this.propertySourceLocator
			.locate(this.configurableEnvironment);

	assertThat(propertySource).isInstanceOf(CompositePropertySource.class);

	verify(this.secretLeaseContainer).addRequestedSecret(rotating);
	verify(this.secretLeaseContainer).addRequestedSecret(
			RequestedSecret.renewable("database/mysql/creds/readonly"));
}
 

@Test
public void shouldLocatePropertySourcesInVaultApplicationContext() {

	VaultKeyValueBackendProperties backendProperties = new VaultKeyValueBackendProperties();
	backendProperties.setApplicationName("wintermute");
	backendProperties.setProfiles(Arrays.asList("vermillion", "periwinkle"));

	this.propertySourceLocator = new VaultPropertySourceLocator(this.operations,
			new VaultProperties(),
			VaultPropertySourceLocatorSupport.createConfiguration(backendProperties));

	PropertySource<?> propertySource = this.propertySourceLocator
			.locate(this.configurableEnvironment);

	assertThat(propertySource).isInstanceOf(CompositePropertySource.class);

	CompositePropertySource composite = (CompositePropertySource) propertySource;
	assertThat(composite.getPropertySources()).extracting("name").containsSequence(
			"secret/wintermute/periwinkle", "secret/wintermute/vermillion",
			"secret/wintermute");
}
 

@Test
public void shouldLocatePropertySourcesInEachPathSpecifiedWhenApplicationNameContainsSeveral() {

	VaultKeyValueBackendProperties backendProperties = new VaultKeyValueBackendProperties();
	backendProperties.setApplicationName("wintermute,straylight,icebreaker/armitage");
	backendProperties.setProfiles(Arrays.asList("vermillion", "periwinkle"));

	this.propertySourceLocator = new VaultPropertySourceLocator(this.operations,
			new VaultProperties(),
			VaultPropertySourceLocatorSupport.createConfiguration(backendProperties));

	PropertySource<?> propertySource = this.propertySourceLocator
			.locate(this.configurableEnvironment);

	assertThat(propertySource).isInstanceOf(CompositePropertySource.class);

	CompositePropertySource composite = (CompositePropertySource) propertySource;
	assertThat(composite.getPropertySources()).extracting("name").contains(
			"secret/wintermute", "secret/straylight", "secret/icebreaker/armitage",
			"secret/wintermute/vermillion", "secret/wintermute/periwinkle",
			"secret/straylight/vermillion", "secret/straylight/periwinkle",
			"secret/icebreaker/armitage/vermillion",
			"secret/icebreaker/armitage/periwinkle");
}
 

@Test
public void shouldCreatePropertySourcesInOrder() {

	DefaultSecretBackendConfigurer configurer = new DefaultSecretBackendConfigurer();
	configurer.add(new MySecondSecretBackendMetadata());
	configurer.add(new MyFirstSecretBackendMetadata());

	this.propertySourceLocator = new VaultPropertySourceLocator(this.operations,
			new VaultProperties(), configurer);

	PropertySource<?> propertySource = this.propertySourceLocator
			.locate(this.configurableEnvironment);

	assertThat(propertySource).isInstanceOf(CompositePropertySource.class);

	CompositePropertySource composite = (CompositePropertySource) propertySource;
	assertThat(composite.getPropertySources()).extracting("name")
			.containsSequence("foo", "bar");
}
 

private PropertySource createPropertySource(AnnotationAttributes attributes, ConfigurableEnvironment environment, ResourceLoader resourceLoader, EncryptablePropertyResolver resolver, EncryptablePropertyFilter propertyFilter, List<PropertySourceLoader> loaders) throws Exception {
    String name = generateName(attributes.getString("name"));
    String[] locations = attributes.getStringArray("value");
    boolean ignoreResourceNotFound = attributes.getBoolean("ignoreResourceNotFound");
    CompositePropertySource compositePropertySource = new CompositePropertySource(name);
    Assert.isTrue(locations.length > 0, "At least one @PropertySource(value) location is required");
    for (String location : locations) {
        String resolvedLocation = environment.resolveRequiredPlaceholders(location);
        Resource resource = resourceLoader.getResource(resolvedLocation);
        if (!resource.exists()) {
            if (!ignoreResourceNotFound) {
                throw new IllegalStateException(String.format("Encryptable Property Source '%s' from location: %s Not Found", name, resolvedLocation));
            } else {
                log.info("Ignoring NOT FOUND Encryptable Property Source '{}' from locations: {}", name, resolvedLocation);
            }
        } else {
            String actualName = name + "#" + resolvedLocation;
            loadPropertySource(loaders, resource, actualName)
                    .ifPresent(psources -> psources.forEach(compositePropertySource::addPropertySource));
        }
    }
    return new EncryptableEnumerablePropertySourceWrapper<>(compositePropertySource, resolver, propertyFilter);
}
 

static Collection<PropertySource<?>> locateCollection(PropertySourceLocator locator,
		Environment environment) {
	PropertySource<?> propertySource = locator.locate(environment);
	if (propertySource == null) {
		return Collections.emptyList();
	}
	if (CompositePropertySource.class.isInstance(propertySource)) {
		Collection<PropertySource<?>> sources = ((CompositePropertySource) propertySource)
				.getPropertySources();
		List<PropertySource<?>> filteredSources = new ArrayList<>();
		for (PropertySource<?> p : sources) {
			if (p != null) {
				filteredSources.add(p);
			}
		}
		return filteredSources;
	}
	else {
		return Arrays.asList(propertySource);
	}
}
 

@Override
public PropertySource<?> locate(Environment environment) {
	if (this.name != null) {
		then(this.name)
				.isEqualTo(environment.getProperty("spring.application.name"));
	}
	if (this.fail) {
		throw new RuntimeException("Planned");
	}
	CompositePropertySource compositePropertySource = new CompositePropertySource(
			"listTestBootstrap");
	compositePropertySource.addFirstPropertySource(
			new MapPropertySource("testBootstrap1", MAP1));
	compositePropertySource.addFirstPropertySource(
			new MapPropertySource("testBootstrap2", MAP2));
	return compositePropertySource;
}
 

@Test
public void testDecryptCompositePropertySource() {
	ConfigurableApplicationContext ctx = new AnnotationConfigApplicationContext();
	EnvironmentDecryptApplicationInitializer initializer = new EnvironmentDecryptApplicationInitializer(
			Encryptors.noOpText());

	MapPropertySource devProfile = new MapPropertySource("dev-profile",
			Collections.singletonMap("key", "{cipher}value1"));

	MapPropertySource defaultProfile = new MapPropertySource("default-profile",
			Collections.singletonMap("key", "{cipher}value2"));

	CompositePropertySource cps = mock(CompositePropertySource.class);
	when(cps.getPropertyNames()).thenReturn(devProfile.getPropertyNames());
	when(cps.getPropertySources())
			.thenReturn(Arrays.asList(devProfile, defaultProfile));
	ctx.getEnvironment().getPropertySources().addLast(cps);

	initializer.initialize(ctx);
	then(ctx.getEnvironment().getProperty("key")).isEqualTo("value1");
}
 

private PropertySource<?> loadPropertySource(Resource resource, String path) {
	if (resource.exists()) {
		try {
			List<PropertySource<?>> sources = new YamlPropertySourceLoader().load(path,
					resource);
			if (sources != null) {
				logger.info("Loaded YAML properties from: " + resource);
			} else if (sources == null || sources.isEmpty()){
			    return null;
               }

			CompositePropertySource composite = new CompositePropertySource("cli-sources");

			for (PropertySource propertySource : sources) {
				composite.addPropertySource(propertySource);
			}

			return composite;
		}
		catch (IOException e) {
		}
	}
	return null;
}
 

@Test
public void serviceUrlWithCompositePropertySource() {
	CompositePropertySource source = new CompositePropertySource("composite");
	this.context.getEnvironment().getPropertySources().addFirst(source);
	source.addPropertySource(new MapPropertySource("config",
			Collections.<String, Object>singletonMap(
					"eureka.client.serviceUrl.defaultZone",
					"https://example.com,https://example2.com, https://www.hugedomains.com/domain_profile.cfm?d=example3&e=com")));
	this.context.register(PropertyPlaceholderAutoConfiguration.class,
			TestConfiguration.class);
	this.context.refresh();
	assertThat(this.context.getBean(EurekaClientConfigBean.class).getServiceUrl()
			.toString()).isEqualTo(
					"{defaultZone=https://example.com,https://example2.com, https://www.hugedomains.com/domain_profile.cfm?d=example3&e=com}");
	assertThat(getEurekaServiceUrlsForDefaultZone()).isEqualTo(
			"[https://example.com/, https://example2.com/, https://www.hugedomains.com/domain_profile.cfm?d=example3&e=com/]");
}
 

@Override
protected void doHealthCheck(Builder builder) throws Exception {
	PropertySource<?> propertySource = getPropertySource();
	builder.up();
	if (propertySource instanceof CompositePropertySource) {
		List<String> sources = new ArrayList<>();
		for (PropertySource<?> ps : ((CompositePropertySource) propertySource)
				.getPropertySources()) {
			sources.add(ps.getName());
		}
		builder.withDetail("propertySources", sources);
	}
	else if (propertySource != null) {
		builder.withDetail("propertySources", propertySource.toString());
	}
	else {
		builder.unknown().withDetail("error", "no property sources located");
	}
}
 

@Override
public PropertySource<?> locate(Environment environment) {
  ServiceCombConfigPropertySource serviceCombConfigPropertySource = new ServiceCombConfigPropertySource(
      ConfigConstants.PROPERTYSOURCE_NAME,
      serviceCombConfigClient);
  try {
    serviceCombConfigPropertySource
        .loadAllRemoteConfig(serviceCombConfigProperties, project);
  } catch (RemoteOperationException e) {
    LOGGER.error(e.getMessage(), e);
  }
  CompositePropertySource composite = new CompositePropertySource(ConfigConstants.PROPERTYSOURCE_NAME);
  composite.addPropertySource(serviceCombConfigPropertySource);
  return composite;
}
 

private void addPropertySource(PropertySource<?> propertySource) {
	String name = propertySource.getName();
	MutablePropertySources propertySources = ((ConfigurableEnvironment) this.environment).getPropertySources();

	if (this.propertySourceNames.contains(name)) {
		// We've already added a version, we need to extend it
		PropertySource<?> existing = propertySources.get(name);
		if (existing != null) {
			PropertySource<?> newSource = (propertySource instanceof ResourcePropertySource ?
					((ResourcePropertySource) propertySource).withResourceName() : propertySource);
			if (existing instanceof CompositePropertySource) {
				((CompositePropertySource) existing).addFirstPropertySource(newSource);
			}
			else {
				if (existing instanceof ResourcePropertySource) {
					existing = ((ResourcePropertySource) existing).withResourceName();
				}
				CompositePropertySource composite = new CompositePropertySource(name);
				composite.addPropertySource(newSource);
				composite.addPropertySource(existing);
				propertySources.replace(name, composite);
			}
			return;
		}
	}

	if (this.propertySourceNames.isEmpty()) {
		propertySources.addLast(propertySource);
	}
	else {
		String firstProcessed = this.propertySourceNames.get(this.propertySourceNames.size() - 1);
		propertySources.addBefore(firstProcessed, propertySource);
	}
	this.propertySourceNames.add(name);
}
 

private void extract(String root, Map<String, PropertySource<?>> map,
		PropertySource<?> source) {
	if (source instanceof CompositePropertySource) {
		for (PropertySource<?> nest : ((CompositePropertySource) source)
				.getPropertySources()) {
			extract(source.getName() + ":", map, nest);
		}
	}
	else {
		map.put(root + source.getName(), source);
	}
}
 

@Test
public void propertySourcesFound() throws Exception {
    String foo = this.environment.getProperty("foo");
    assertThat(foo).as("foo was wrong").isEqualTo("bar-app-dev");

    String myBaz = this.environment.getProperty("my.baz");
    assertThat(myBaz).as("my.baz was wrong").isEqualTo("bar-app-dev");

    MutablePropertySources propertySources = this.environment.getPropertySources();
    PropertySource<?> bootstrapProperties = propertySources
            .get("bootstrapProperties");
    assertThat(bootstrapProperties).as("bootstrapProperties was null").isNotNull();
    assertThat(bootstrapProperties).as("bootstrapProperties was wrong type")
            .isInstanceOf(CompositePropertySource.class);

    Collection<PropertySource<?>> consulSources = ((CompositePropertySource) bootstrapProperties)
            .getPropertySources();
    assertThat(consulSources).as("consulSources was wrong size").hasSize(1);

    PropertySource<?> consulSource = consulSources.iterator().next();
    assertThat(consulSource).as("consulSource was wrong type")
            .isInstanceOf(CompositePropertySource.class);
    Collection<PropertySource<?>> fileSources = ((CompositePropertySource) consulSource)
            .getPropertySources();
    assertThat(fileSources).as("fileSources was wrong size").hasSize(4);

    assertFileSourceNames(fileSources, APP_NAME_DEV_PROPS, APP_NAME_PROPS,
            APPLICATION_DEV_YML, APPLICATION_YML);
}
 

private void processApplicationResult(CompositePropertySource composite, Environment result) {
    if (result.getPropertySources() != null) { // result.getPropertySources() can be null if using xml
        for (PropertySource source : result.getPropertySources()) {
            @SuppressWarnings("unchecked")
            Map<String, Object> map = (Map<String, Object>) source
                    .getSource();
            composite.addPropertySource(new MapPropertySource(source
                    .getName(), map));
        }
    }
}
 

private void addConfigLocationFiles(ConfigurableEnvironment environment, CompositePropertySource composite) {
    MutablePropertySources ps = environment.getPropertySources();
    for (org.springframework.core.env.PropertySource<?> propertySource : ps) {
        if (propertySource.getName().startsWith("applicationConfig: [file:")) {
            logger.info("Adding {} to Cloud Config Client PropertySource", propertySource.getName());
            composite.addPropertySource(propertySource);
        }
    }
}
 

private void addPropertySource(PropertySource<?> propertySource) {
	String name = propertySource.getName();
	MutablePropertySources propertySources = ((ConfigurableEnvironment) this.environment).getPropertySources();

	if (this.propertySourceNames.contains(name)) {
		// We've already added a version, we need to extend it
		PropertySource<?> existing = propertySources.get(name);
		if (existing != null) {
			PropertySource<?> newSource = (propertySource instanceof ResourcePropertySource ?
					((ResourcePropertySource) propertySource).withResourceName() : propertySource);
			if (existing instanceof CompositePropertySource) {
				((CompositePropertySource) existing).addFirstPropertySource(newSource);
			}
			else {
				if (existing instanceof ResourcePropertySource) {
					existing = ((ResourcePropertySource) existing).withResourceName();
				}
				CompositePropertySource composite = new CompositePropertySource(name);
				composite.addPropertySource(newSource);
				composite.addPropertySource(existing);
				propertySources.replace(name, composite);
			}
			return;
		}
	}

	if (this.propertySourceNames.isEmpty()) {
		propertySources.addLast(propertySource);
	}
	else {
		String firstProcessed = this.propertySourceNames.get(this.propertySourceNames.size() - 1);
		propertySources.addBefore(firstProcessed, propertySource);
	}
	this.propertySourceNames.add(name);
}
 

private void extract(String root, Map<String, PropertySource<?>> map,
		PropertySource<?> source) {
	if (source instanceof CompositePropertySource) {
		for (PropertySource<?> nest : ((CompositePropertySource) source)
				.getPropertySources()) {
			extract(source.getName() + ":", map, nest);
		}
	}
	else {
		map.put(root + source.getName(), source);
	}
}
 

private static void extract(String root, Map<String, PropertySource<?>> map,
                            PropertySource<?> source) {
    if (source instanceof CompositePropertySource) {
        for (PropertySource<?> nest : ((CompositePropertySource) source)
                .getPropertySources()) {
            extract(source.getName() + ":", map, nest);
        }
    } else {
        map.put(root + source.getName(), source);
    }
}