org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider Java Examples

/**
 * Scans the given base package for entities, i.e. Neo4j specific types annotated with {@link Node}.
 *
 * @param basePackage must not be {@literal null}.
 * @return found entities in the package to scan.
 * @throws ClassNotFoundException if the given class cannot be loaded by the class loader.
 */
protected final Set<Class<?>> scanForEntities(String basePackage) throws ClassNotFoundException {

	if (!StringUtils.hasText(basePackage)) {
		return Collections.emptySet();
	}

	Set<Class<?>> initialEntitySet = new HashSet<Class<?>>();

	ClassPathScanningCandidateComponentProvider componentProvider =
		new ClassPathScanningCandidateComponentProvider(false);
	componentProvider.addIncludeFilter(new AnnotationTypeFilter(Node.class));

	ClassLoader classLoader = Neo4jConfigurationSupport.class.getClassLoader();
	for (BeanDefinition candidate : componentProvider.findCandidateComponents(basePackage)) {
		initialEntitySet.add(ClassUtils.forName(candidate.getBeanClassName(), classLoader));
	}

	return initialEntitySet;
}
 

@Override
public List<Class> getClasses() {
    List<String> packages = _packages;

    var scanner = new ClassPathScanningCandidateComponentProvider(false);
    scanner.addIncludeFilter(new AnnotationTypeFilter(Controller.class));

    var classes = new ArrayList<Class>();
    if (packages == null) packages = Arrays.asList("cn", "com");
    for (var packageName : packages) {
        var beans = scanner.findCandidateComponents(packageName);
        for (var bean : beans) {
            try {
                var className = bean.getBeanClassName();
                Class clazz = Class.forName(className);

                classes.add(clazz);
            } catch (ClassNotFoundException e) {
                _logger.warn("not found class:" + bean.getBeanClassName(), e);
            }
        }
    }
    return classes;
}
 

private void generateApiMessageGroovyClass(StringBuilder sb, List<String> basePkgs) {
    ClassPathScanningCandidateComponentProvider scanner = new ClassPathScanningCandidateComponentProvider(true);
    scanner.addIncludeFilter(new AssignableTypeFilter(APIMessage.class));
    scanner.addIncludeFilter(new AssignableTypeFilter(APIReply.class));
    scanner.addIncludeFilter(new AssignableTypeFilter(APIEvent.class));
    scanner.addExcludeFilter(new AnnotationTypeFilter(Controller.class));
    scanner.addExcludeFilter(new AnnotationTypeFilter(Component.class));
    for (String pkg : basePkgs) {
        for (BeanDefinition bd : scanner.findCandidateComponents(pkg)) {
            try {
                Class<?> clazz = Class.forName(bd.getBeanClassName());
                //classToApiMessageGroovyClass(sb, clazz);
                classToApiMessageGroovyInformation(sb, clazz);
            } catch (ClassNotFoundException e) {
                logger.warn(String.format("Unable to generate groovy class for %s", bd.getBeanClassName()), e);
            }
        }
    }
}
 

@SuppressWarnings("rawtypes")
private List<Class> findClasses(String packageName)
		throws ClassNotFoundException {
	List<Class> classes = new ArrayList<Class>();

	ClassPathScanningCandidateComponentProvider scanner = new ClassPathScanningCandidateComponentProvider(
			true);

	// scanner.addIncludeFilter(new
	// AnnotationTypeFilter(<TYPE_YOUR_ANNOTATION_HERE>.class));

	for (BeanDefinition bd : scanner.findCandidateComponents(packageName)) {
		classes.add(Class.forName(bd.getBeanClassName()));
	}

	return classes;
}
 

@Test
public void failIfNewTypeOfMaterialIsNotAddedInTheAboveTest() throws Exception {
    ClassPathScanningCandidateComponentProvider provider = new ClassPathScanningCandidateComponentProvider(false);
    provider.addIncludeFilter(new AssignableTypeFilter(MaterialConfig.class));
    Set<BeanDefinition> candidateComponents = provider.findCandidateComponents("com/thoughtworks");
    List<Class> reflectionsSubTypesOf = candidateComponents.stream().map(beanDefinition -> beanDefinition.getBeanClassName()).map(s -> {
        try {
            return Class.forName(s);
        } catch (ClassNotFoundException e) {
            throw new RuntimeException(e);
        }
    }).collect(Collectors.toList());

    reflectionsSubTypesOf.removeIf(this::isNotAConcrete_NonTest_MaterialConfigImplementation);

    List<Class> allExpectedMaterialConfigImplementations = allMaterialConfigsWhichAreDataPointsInThisTest();

    assertThatAllMaterialConfigsInCodeAreTestedHere(reflectionsSubTypesOf, allExpectedMaterialConfigImplementations);
}
 

/**
 * Search the classes in the PREDICATE_BASE_PACKAGE and build a list of all simple (non-composite) Predicate classes
 * @return a list of simple Predicate classes
 * @throws ClassNotFoundException
 */
private ArrayList<Class<?>> discoverSimplePredicateClasses() throws ClassNotFoundException {
    ArrayList<Class<?>> discoveredPredicateClasses = new ArrayList<Class<?>>();

    // This technique was copped from:
    // http://stackoverflow.com/questions/520328/can-you-find-all-classes-in-a-package-using-reflection

    ClassPathScanningCandidateComponentProvider provider = new ClassPathScanningCandidateComponentProvider(true);
    provider.addIncludeFilter(new AssignableTypeFilter(Predicate.class));

    // scan in org.example.package
    Set<BeanDefinition> components = provider.findCandidateComponents(PREDICATE_BASE_PACKAGE);
    for (BeanDefinition component : components)
    {
        Class cls = Class.forName(component.getBeanClassName());
        if (!cls.isMemberClass()                             // filter out inner class predicates from test packages
            && Predicate.class.isAssignableFrom(cls)         // filter out any non-predicate classes
            && !CompositePredicate.class.isAssignableFrom(cls)) // filter out 'and' and 'or' predicates
        {
            discoveredPredicateClasses.add(cls);
            // use class cls found
            LOG.debug("discovered " + cls.toString());
        }
    }
    return discoveredPredicateClasses;
}
 

public void testWebServices() throws Exception {
    

    ClassPathScanningCandidateComponentProvider provider = new ClassPathScanningCandidateComponentProvider(false);
    provider.addIncludeFilter(new AssignableTypeFilter(KfsKcSoapService.class));
    Set<BeanDefinition> components = provider.findCandidateComponents(TEST_BASE_PACKAGE);
    for (BeanDefinition component : components) {
        String className = component.getBeanClassName();
        Class<KfsKcSoapService> kfsServiceClass = (Class<KfsKcSoapService>) Class.forName(className);
        try {
            KfsKcSoapService kfsServiceInst = kfsServiceClass.newInstance();
            URL myWsdl = kfsServiceInst.getWsdl();
            assertTrue(isValidfetchXML(myWsdl));
        }
        catch (Exception ex) {
            fail(ex.getMessage());
        }
    }
}
 

/**
 * Gets api def class.
 *
 * @param scanner the scanner
 * @param packagesToScan the packages to scan
 * @return the api def class
 */
private OpenAPIDefinition getApiDefClass(ClassPathScanningCandidateComponentProvider scanner,
		List<String> packagesToScan) {
	for (String pack : packagesToScan) {
		for (BeanDefinition bd : scanner.findCandidateComponents(pack)) {
			// first one found is ok
			try {
				return AnnotationUtils.findAnnotation(Class.forName(bd.getBeanClassName()),
						OpenAPIDefinition.class);
			}
			catch (ClassNotFoundException e) {
				LOGGER.error("Class Not Found in classpath : {}", e.getMessage());
			}
		}
	}
	return null;
}
 

@PostConstruct
private void initializeCommandApi() {
    logger.info("Initialising the command API list.");

    ClassPathScanningCandidateComponentProvider provider = new ClassPathScanningCandidateComponentProvider(false);
    BASE_COMMAND_CLASS.forEach(superCmdClazz -> provider.addIncludeFilter(new AssignableTypeFilter(superCmdClazz)));

    List<String> commandClassNames = provider.findCandidateComponents(CORE_API_PACKAGE)
                                             .stream()
                                             .map(BeanDefinition::getBeanClassName)
                                             .collect(Collectors.toList());

    simpleToFullClassName = commandClassNames.stream().collect(Collectors.toMap(
            this::simpleCommandClassName, commandClassName -> commandClassName
    ));

    commandApi = commandClassNames.stream().collect(Collectors.toMap(
            this::simpleCommandClassName, this::commandJsonSchema
    ));

    logger.info("{} commands available.", commandApi.size());
}
 

protected ClassPathScanningCandidateComponentProvider getScanner() {

        return new ClassPathScanningCandidateComponentProvider( false, this.environment ) {

            @Override
            protected boolean isCandidateComponent(
                    AnnotatedBeanDefinition beanDefinition) {
                if (beanDefinition.getMetadata().isIndependent()) {

                    if (beanDefinition.getMetadata().isInterface() && beanDefinition.getMetadata().getInterfaceNames().length == 1
                            && Annotation.class.getName().equals( beanDefinition.getMetadata().getInterfaceNames()[0] )) {
                        try {
                            Class<?> target = ClassUtils.forName( beanDefinition.getMetadata().getClassName(), NettyRpcRegistrar.this.classLoader );
                            return !target.isAnnotation();
                        } catch (Exception ex) {
                            this.logger.error( "Could not load target class: " + beanDefinition.getMetadata().getClassName(), ex );

                        }
                    }
                    return true;
                }
                return false;

            }
        };
    }
 

/**
 * Gets security schemes classes.
 *
 * @param scanner the scanner
 * @param packagesToScan the packages to scan
 * @return the security schemes classes
 */
private Set<io.swagger.v3.oas.annotations.security.SecurityScheme> getSecuritySchemesClasses(
		ClassPathScanningCandidateComponentProvider scanner, List<String> packagesToScan) {
	Set<io.swagger.v3.oas.annotations.security.SecurityScheme> apiSecurityScheme = new HashSet<>();
	for (String pack : packagesToScan) {
		for (BeanDefinition bd : scanner.findCandidateComponents(pack)) {
			try {
				apiSecurityScheme.add(AnnotationUtils.findAnnotation(Class.forName(bd.getBeanClassName()),
						io.swagger.v3.oas.annotations.security.SecurityScheme.class));
			}
			catch (ClassNotFoundException e) {
				LOGGER.error("Class Not Found in classpath : {}", e.getMessage());
			}
		}
	}
	return apiSecurityScheme;
}
 

@Override
public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata, BeanDefinitionRegistry registry) {
	ClassPathScanningCandidateComponentProvider scanner = new ScanningComponent(Boolean.FALSE, this.environment);
	scanner.setResourceLoader(this.resourceLoader);

	AnnotationTypeFilter annotationTypeFilter = new AnnotationTypeFilter(Network.class);
	scanner.addIncludeFilter(annotationTypeFilter);

	String packageName = ClassUtils.getPackageName(importingClassMetadata.getClassName());
	Set<BeanDefinition> candidateComponents = scanner.findCandidateComponents(packageName);
	candidateComponents.forEach(beanDefinition -> {
		AnnotatedBeanDefinition annotatedBeanDefinition = (AnnotatedBeanDefinition) beanDefinition;
		AnnotationMetadata annotationMetadata = annotatedBeanDefinition.getMetadata();
		BeanDefinitionBuilder definition = BeanDefinitionBuilder.genericBeanDefinition(NetworkFactory.class);
		String className = annotationMetadata.getClassName();
		definition.addPropertyValue(NetworkFactoryConstants.PROPERTY_VALUE.getValue(), className);
		definition.setAutowireMode(AbstractBeanDefinition.AUTOWIRE_BY_TYPE);

		AbstractBeanDefinition abstractBeanDefinition = definition.getBeanDefinition();
		BeanDefinitionHolder holder = new BeanDefinitionHolder(abstractBeanDefinition, className);
		BeanDefinitionReaderUtils.registerBeanDefinition(holder, registry);

	});

}
 

@Override
public void afterPropertiesSet() throws Exception {
    ClassPathScanningCandidateComponentProvider provider = new ClassPathScanningCandidateComponentProvider(false);
    provider.addIncludeFilter(new AssignableTypeFilter(GeminiException.class));
    Set<BeanDefinition> components = provider.findCandidateComponents("it.at7.gemini");
    for (BeanDefinition component : components) {
        Class<?> gemException = Class.forName(component.getBeanClassName());
        Class<?>[] innerClasses = gemException.getDeclaredClasses();
        for (Class<?> innerClass : innerClasses) {
            String simpleName = innerClass.getSimpleName();
            if (simpleName.equals("Code")) {
                Enum[] enumConstants = (Enum[]) innerClass.getEnumConstants();
                register(enumConstants);
            }
        }
    }
}
 

@Test
public void testCompileExtendedServices() throws Exception
{
    ClassPathScanningCandidateComponentProvider provider = new ClassPathScanningCandidateComponentProvider(true);
    provider.addIncludeFilter(new AssignableTypeFilter(Extensible.class));

    Set<BeanDefinition> components = provider.findCandidateComponents("org/alfresco/*");
    Set<Class<? extends Extensible>> extensibles = new HashSet<>();
    for (BeanDefinition component : components)
    {
        @SuppressWarnings("unchecked")
        Class<? extends Extensible> extensibleClass = (Class<? extends Extensible>) Class.forName(component
                    .getBeanClassName());
        extensibles.add(extensibleClass);

    }
    compile(extensibles);
}
 

void init() throws ClassNotFoundException, InstantiationException, IllegalAccessException {
    Set<APIEvent> boundEvents = new HashSet<APIEvent>(100);
    ClassPathScanningCandidateComponentProvider scanner = new ClassPathScanningCandidateComponentProvider(true);
    scanner.resetFilters(false);
    scanner.addIncludeFilter(new AssignableTypeFilter(APIEvent.class));
    for (String pkg : getBasePkgNames()) {
        for (BeanDefinition bd : scanner.findCandidateComponents(pkg)) {
            Class<?> clazz = Class.forName(bd.getBeanClassName());
            if (clazz == APIEvent.class) {
                continue;
            }
            APIEvent evt = (APIEvent) clazz.newInstance();
            boundEvents.add(evt);
        }
    }

    for (APIEvent e : boundEvents) {
        bus.subscribeEvent(this, e);
    }
}
 

static Class<? extends ExecutionFactory<?, ?>> findTranslatorInPackage(String translatorName,
        ClassPathScanningCandidateComponentProvider provider, String packageName) {
    Set<BeanDefinition> components = provider.findCandidateComponents(packageName);
    for (BeanDefinition c : components) {
        try {
            @SuppressWarnings("unchecked")
            Class<? extends ExecutionFactory<?, ?>> clazz = (Class<? extends ExecutionFactory<?, ?>>) Class
            .forName(c.getBeanClassName());
            String name = clazz.getAnnotation(Translator.class).name();
            if (name.equals(translatorName)) {
                return clazz;
            }
        } catch (ClassNotFoundException | SecurityException | IllegalArgumentException e) {
            throw new IllegalStateException("Error loading translators", e);
        }
    }
    return null;
}
 

private void generateInventoryPythonClass(StringBuilder sb, List<String> basePkgs) {
    List<String> inventoryPython = new ArrayList<>();
    ClassPathScanningCandidateComponentProvider scanner = new ClassPathScanningCandidateComponentProvider(false);
    scanner.addIncludeFilter(new AnnotationTypeFilter(PythonClassInventory.class));
    scanner.addExcludeFilter(new AnnotationTypeFilter(Component.class));
    for (String pkg : basePkgs) {
        for (BeanDefinition bd : scanner.findCandidateComponents(pkg).stream().sorted((bd1, bd2) -> {
            return bd1.getBeanClassName().compareTo(bd2.getBeanClassName());
        }).collect(Collectors.toList())) {
            try {
                Class<?> clazz = Class.forName(bd.getBeanClassName());
                if (isPythonClassGenerated(clazz)) {
                    /* This class was generated as other's parent class */
                    continue;
                }
                inventoryPython.add(classToInventoryPythonClass(clazz));
            } catch (Exception e) {
                logger.warn(String.format("Unable to generate python class for %s", bd.getBeanClassName()), e);
            }
        }
    }

    for (String invstr : inventoryPython) {
        sb.append(invstr);
    }
}
 

@Test
public void testAllAnnotatedClasses() throws NoSuchFieldException, ClassNotFoundException {
    ClassPathScanningCandidateComponentProvider scanner = new ClassPathScanningCandidateComponentProvider(false);
    scanner.addIncludeFilter(new AnnotationTypeFilter(ValidIfExactlyOneNonNull.class));
    for (BeanDefinition def : scanner.findCandidateComponents("com.sequenceiq.redbeams")) {
        String annotatedClassName = def.getBeanClassName();
        Class<?> annotatedClass = Class.forName(annotatedClassName);
        ValidIfExactlyOneNonNull classAnnotation = annotatedClass.getAnnotation(ValidIfExactlyOneNonNull.class);
        String[] fields = classAnnotation.fields();
        if (fields.length == 0) {
            fail("ValidIfExactlyOneNonNull annotation on class " + annotatedClassName + " has no fields");
        }
        for (String fieldName : classAnnotation.fields()) {
            annotatedClass.getDeclaredField(fieldName);
            // if this does not throw an exception, great
        }
    }
}
 

static Class<? extends ExecutionFactory<?, ?>> findTranslatorInPackage(String translatorName,
        ClassPathScanningCandidateComponentProvider provider, String packageName) {
    Set<BeanDefinition> components = provider.findCandidateComponents(packageName);
    for (BeanDefinition c : components) {
        try {
            @SuppressWarnings("unchecked")
            Class<? extends ExecutionFactory<?, ?>> clazz = (Class<? extends ExecutionFactory<?, ?>>) Class
            .forName(c.getBeanClassName());
            String name = clazz.getAnnotation(Translator.class).name();
            if (name.equals(translatorName)) {
                return clazz;
            }
        } catch (ClassNotFoundException | SecurityException | IllegalArgumentException e) {
            throw new IllegalStateException("Error loading translators", e);
        }
    }
    return null;
}
 

protected Set<Class<?>> scanForEntities(String basePackage) throws ClassNotFoundException {
    if (!StringUtils.hasText(basePackage)) {
        return Collections.emptySet();
    }

    final Set<Class<?>> initialEntitySet = new HashSet<>();

    if (StringUtils.hasText(basePackage)) {
        final ClassPathScanningCandidateComponentProvider componentProvider =
                new ClassPathScanningCandidateComponentProvider(false);

        componentProvider.addIncludeFilter(new AnnotationTypeFilter(Persistent.class));

        for (final BeanDefinition candidate : componentProvider.findCandidateComponents(basePackage)) {
            final String className = candidate.getBeanClassName();
            Assert.notNull(className, "Bean class name is null.");

            initialEntitySet
                    .add(ClassUtils.forName(className, CosmosConfigurationSupport.class.getClassLoader()));
        }
    }

    return initialEntitySet;
}
 

private void populateTriggerVOs() throws ClassNotFoundException {
    ClassPathScanningCandidateComponentProvider scanner = new ClassPathScanningCandidateComponentProvider(true);
    scanner.addIncludeFilter(new AnnotationTypeFilter(TriggerIndex.class));
    scanner.addExcludeFilter(new AnnotationTypeFilter(Controller.class));
    for (String pkg : getBasePkgNames()) {
        for (BeanDefinition bd : scanner.findCandidateComponents(pkg)) {
            Class<?> triggerVO = Class.forName(bd.getBeanClassName());
            if (!triggerVO.isAnnotationPresent(Entity.class)) {
                throw new IllegalArgumentException(String.format("Class[%s] is annotated by @TriggerIndex, but not annotated by @Entity",
                        triggerVO.getName()));
            }
            triggerVOs.add(triggerVO);
            popluateTriggerVONamesCascade(triggerVO);
        }
    }
}
 

private static List<TranslatableContainer<?>> findAllTranslatables() throws ClassNotFoundException {
    final List<TranslatableContainer<?>> foundClasses = new ArrayList<>();

    final ClassPathScanningCandidateComponentProvider scanner = new ClassPathScanningCandidateComponentProvider(
            true);
    scanner.addIncludeFilter((metadataReader, metadataReaderFactory) -> true);

    final Stream<String> classNamesStream = scanner.findCandidateComponents("org.phoenicis").stream()
            .map(BeanDefinition::getBeanClassName);
    final Iterable<String> classNames = classNamesStream::iterator;

    for (String className : classNames) {
        final Class<?> clazz = Class.forName(className);
        if (isTranslatable(clazz)) {
            foundClasses.add(new TranslatableContainer<>(clazz));
        }
    }

    return foundClasses;
}
 

private static List<DTOContainer<?>> findAllDTOs() throws ClassNotFoundException {
    final List<DTOContainer<?>> fondJsonCreatorClasses = new ArrayList<>();

    final ClassPathScanningCandidateComponentProvider scanner = new ClassPathScanningCandidateComponentProvider(
            true);
    scanner.addIncludeFilter((metadataReader, metadataReaderFactory) -> true);

    final Stream<String> classNamesStream = scanner.findCandidateComponents("org.phoenicis").stream()
            .map(BeanDefinition::getBeanClassName);
    final Iterable<String> classNames = classNamesStream::iterator;

    for (String className : classNames) {
        final Class<?> clazz = Class.forName(className);
        if (isJsonClass(clazz)) {
            fondJsonCreatorClasses.add(new DTOContainer<>(clazz));
        }
    }

    return fondJsonCreatorClasses;
}
 

public List<BeanDefinition> scanBeanDefinitions(Class<? extends Annotation> annoClass, String...extraPackagesToScans){
	ClassPathScanningCandidateComponentProvider scanner = createAnnotationScanner(classLoader, annoClass);
	if(resourceLoader!=null){
		scanner.setResourceLoader(resourceLoader);
	}
	/*Set<String> basePackages = getBasePackages();
	for (String basePackage : basePackages) {
		Set<BeanDefinition> candidateComponents = scanner.findCandidateComponents(basePackage);
		for (BeanDefinition candidateComponent : candidateComponents) {
			consumer.accept(candidateComponent);
		}
	}*/
	Set<String> basePackages = getBasePackages();
	if(!LangUtils.isEmpty(extraPackagesToScans)){
		basePackages.addAll(Arrays.asList(extraPackagesToScans));
	}
	return basePackages.stream()
						.flatMap(pack->scanner.findCandidateComponents(pack).stream())
						.collect(Collectors.toList());
}
 

@Override
public void configureRepositoryRestConfiguration(RepositoryRestConfiguration config) {
    ClassPathScanningCandidateComponentProvider provider = new ClassPathScanningCandidateComponentProvider(true);
    provider.addIncludeFilter(new AssignableTypeFilter(IdentifiableEntity.class));
    Set<BeanDefinition> components = provider.findCandidateComponents(this.getClass().getPackage().getName());
    List<Class<?>> classes = new ArrayList<>();

    components.forEach(component -> {
        try {
            classes.add(Class.forName(component.getBeanClassName()));
        } catch (Exception e) {
            e.printStackTrace();
        }
    });

    config.exposeIdsFor(classes.toArray(new Class[classes.size()]));
}
 

public static Map<String, EventHandler> buildEventHandlersRegistry(final String basePackage,
                                                                   final ApplicationContext context) {

    final Map<String, EventHandler> registry = new HashMap<>();
    final ClassPathScanningCandidateComponentProvider scanner = new ClassPathScanningCandidateComponentProvider(false);
    final AutowireCapableBeanFactory beanFactory = context.getAutowireCapableBeanFactory();
    scanner.addIncludeFilter(new AssignableTypeFilter(EventHandler.class));

    EventHandler currentHandler = null;

    for (BeanDefinition bean : scanner.findCandidateComponents(basePackage)) {
        currentHandler = (EventHandler) beanFactory.createBean(ClassUtils.resolveClassName(bean.getBeanClassName(), context.getClassLoader()),
                AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, true);
        registry.put(currentHandler.getInterest(), currentHandler);
    }

    return registry;
}
 

@SuppressWarnings("unchecked")
public void scanEntities() {
    synchronized ( entitiesScanPath ) {
        for ( String path : entitiesScanPath ) {
            ClassPathScanningCandidateComponentProvider provider =
                    new ClassPathScanningCandidateComponentProvider( true );
            provider.addIncludeFilter( new AssignableTypeFilter( TypedEntity.class ) );

            Set<BeanDefinition> components = provider.findCandidateComponents( path );
            for ( BeanDefinition component : components ) {
                try {
                    Class<?> cls = Class.forName( component.getBeanClassName() );
                    if ( Entity.class.isAssignableFrom( cls ) ) {
                        registerEntity( ( Class<? extends Entity> ) cls );
                    }
                }
                catch ( ClassNotFoundException e ) {
                    logger.error( "Unable to get entity class ", e );
                }
            }
            registerEntity( DynamicEntity.class );
        }
    }
}
 

private static List<Class<?>> getAllEventClass() {
    ClassPathScanningCandidateComponentProvider scanningProvider =
            new ClassPathScanningCandidateComponentProvider(false);
    scanningProvider
            .addIncludeFilter((metadataReader, metadataReaderFactory) -> true);

    return scanningProvider.findCandidateComponents(Event.class.getPackage().getName())
                           .stream()
                           .map(BeanDefinition::getBeanClassName)
                           .map(className -> {
                               try {
                                   return (Class<?>) Class.forName(className);
                               } catch (ClassNotFoundException e) {
                                   throw new RuntimeException(e);
                               }
                           })
                           .filter(Event.class::isAssignableFrom)
                           .collect(toList());
}
 

public static Map<String, CommandHandler> buildCommandHandlersRegistry(final String basePackage,
                                                                       final ApplicationContext context) {

    final Map<String, CommandHandler> registry = new HashMap<>();
    final ClassPathScanningCandidateComponentProvider scanner = new ClassPathScanningCandidateComponentProvider(false);
    final AutowireCapableBeanFactory beanFactory = context.getAutowireCapableBeanFactory();
    scanner.addIncludeFilter(new AssignableTypeFilter(CommandHandler.class));

    CommandHandler currentHandler = null;

    for (BeanDefinition bean : scanner.findCandidateComponents(basePackage)) {
        currentHandler = (CommandHandler) beanFactory.createBean(ClassUtils.resolveClassName(bean.getBeanClassName(), context.getClassLoader()),
                AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, true);
        registry.put(currentHandler.getInterest(), currentHandler);
    }

    return registry;
}
 

/**
 * Scan @Entity classes in base packages.
 * 
 * @param basePackages
 *            base package names.
 * @return List of entity class.
 */
public static List<Class<?>> scanEntities(String... basePackages) {
	ClassPathScanningCandidateComponentProvider provider = new ClassPathScanningCandidateComponentProvider(false);
	provider.addIncludeFilter(new AnnotationTypeFilter(Entity.class));
	List<Class<?>> classes = new ArrayList<>();
	for (String basePackage : basePackages) {
		Set<BeanDefinition> beans = provider.findCandidateComponents(basePackage);
		for (BeanDefinition bean : beans) {
			try {
				classes.add(Class.forName(bean.getBeanClassName()));
			} catch (ClassNotFoundException e) {
				throw new RuntimeException(e);
			}
		}
	}
	return classes;
}