Java Code Examples for org.springframework.core.GenericTypeResolver#resolveTypeArgument()

/**
 * Customize the {@link ConfigurableWebApplicationContext} created by this
 * ContextLoader after config locations have been supplied to the context
 * but before the context is <em>refreshed</em>.
 * <p>The default implementation {@linkplain #determineContextInitializerClasses(ServletContext)
 * determines} what (if any) context initializer classes have been specified through
 * {@linkplain #CONTEXT_INITIALIZER_CLASSES_PARAM context init parameters} and
 * {@linkplain ApplicationContextInitializer#initialize invokes each} with the
 * given web application context.
 * <p>Any {@code ApplicationContextInitializers} implementing
 * {@link org.springframework.core.Ordered Ordered} or marked with @{@link
 * org.springframework.core.annotation.Order Order} will be sorted appropriately.
 * @param sc the current servlet context
 * @param wac the newly created application context
 * @see #CONTEXT_INITIALIZER_CLASSES_PARAM
 * @see ApplicationContextInitializer#initialize(ConfigurableApplicationContext)
 */
protected void customizeContext(ServletContext sc, ConfigurableWebApplicationContext wac) {
	List<Class<ApplicationContextInitializer<ConfigurableApplicationContext>>> initializerClasses =
			determineContextInitializerClasses(sc);

	for (Class<ApplicationContextInitializer<ConfigurableApplicationContext>> initializerClass : initializerClasses) {
		Class<?> initializerContextClass =
				GenericTypeResolver.resolveTypeArgument(initializerClass, ApplicationContextInitializer.class);
		if (initializerContextClass != null) {
			Assert.isAssignable(initializerContextClass, wac.getClass(), String.format(
					"Could not add context initializer [%s] since its generic parameter [%s] " +
					"is not assignable from the type of application context used by this " +
					"context loader [%s]: ", initializerClass.getName(), initializerContextClass.getName(),
					wac.getClass().getName()));
		}
		this.contextInitializers.add(BeanUtils.instantiateClass(initializerClass));
	}

	AnnotationAwareOrderComparator.sort(this.contextInitializers);
	for (ApplicationContextInitializer<ConfigurableApplicationContext> initializer : this.contextInitializers) {
		initializer.initialize(wac);
	}
}
 

@SuppressWarnings("unchecked")
protected BeanPropertiesMapper(final NamespaceService namespaceService, final DictionaryService dictionaryService,
		final BeanPropertiesMapperConfigurer<T> configurer, final boolean reportNamespaceException) {
	Assert.notNull(namespaceService, "[Assertion failed] - the namespaceService argument must be null");
	Assert.notNull(dictionaryService, "[Assertion failed] - the dictionaryService argument must be null");

	this.namespaceService = namespaceService;
	this.dictionaryService = dictionaryService;
	this.reportNamespaceException = reportNamespaceException;

	Class<T> mappedClass = (Class<T>) GenericTypeResolver.resolveTypeArgument(getClass(),
			NodePropertiesMapper.class);
	if (mappedClass != null) {
		setMappedClass(mappedClass);
	}

	BeanPropertiesMapperConfigurer<T> confTmp = configurer;
	if (configurer == null) {
		if (this instanceof BeanPropertiesMapperConfigurer) {
			confTmp = ((BeanPropertiesMapperConfigurer<T>) this);
		}
	}

	this.configurer = confTmp;
}
 

@SuppressWarnings("unchecked")
private ApplicationContextInitializer<ConfigurableApplicationContext> loadInitializer(
		String className, ConfigurableApplicationContext wac) {
	try {
		Class<?> initializerClass = ClassUtils.forName(className, wac.getClassLoader());
		Class<?> initializerContextClass =
				GenericTypeResolver.resolveTypeArgument(initializerClass, ApplicationContextInitializer.class);
		if (initializerContextClass != null && !initializerContextClass.isInstance(wac)) {
			throw new ApplicationContextException(String.format(
					"Could not apply context initializer [%s] since its generic parameter [%s] " +
					"is not assignable from the type of application context used by this " +
					"framework servlet: [%s]", initializerClass.getName(), initializerContextClass.getName(),
					wac.getClass().getName()));
		}
		return BeanUtils.instantiateClass(initializerClass, ApplicationContextInitializer.class);
	}
	catch (ClassNotFoundException ex) {
		throw new ApplicationContextException(String.format("Could not load class [%s] specified " +
				"via 'contextInitializerClasses' init-param", className), ex);
	}
}
 

/**
 * This implementation resolves the type of annotation from generic metadata and
 * validates that (a) the annotation is in fact present on the importing
 * {@code @Configuration} class and (b) that the given annotation has an
 * {@linkplain #getAdviceModeAttributeName() advice mode attribute} of type
 * {@link AdviceMode}.
 * <p>The {@link #selectImports(AdviceMode)} method is then invoked, allowing the
 * concrete implementation to choose imports in a safe and convenient fashion.
 * @throws IllegalArgumentException if expected annotation {@code A} is not present
 * on the importing {@code @Configuration} class or if {@link #selectImports(AdviceMode)}
 * returns {@code null}
 */
@Override
public final String[] selectImports(AnnotationMetadata importingClassMetadata) {
	Class<?> annType = GenericTypeResolver.resolveTypeArgument(getClass(), AdviceModeImportSelector.class);
	Assert.state(annType != null, "Unresolvable type argument for AdviceModeImportSelector");

	AnnotationAttributes attributes = AnnotationConfigUtils.attributesFor(importingClassMetadata, annType);
	if (attributes == null) {
		throw new IllegalArgumentException(String.format(
				"@%s is not present on importing class '%s' as expected",
				annType.getSimpleName(), importingClassMetadata.getClassName()));
	}

	AdviceMode adviceMode = attributes.getEnum(getAdviceModeAttributeName());
	String[] imports = selectImports(adviceMode);
	if (imports == null) {
		throw new IllegalArgumentException("Unknown AdviceMode: " + adviceMode);
	}
	return imports;
}
 

@SuppressWarnings("unchecked")
private ApplicationContextInitializer<ConfigurableApplicationContext> loadInitializer(
		String className, ConfigurableApplicationContext wac) {
	try {
		Class<?> initializerClass = ClassUtils.forName(className, wac.getClassLoader());
		Class<?> initializerContextClass =
				GenericTypeResolver.resolveTypeArgument(initializerClass, ApplicationContextInitializer.class);
		if (initializerContextClass != null) {
			Assert.isAssignable(initializerContextClass, wac.getClass(), String.format(
					"Could not add context initializer [%s] since its generic parameter [%s] " +
					"is not assignable from the type of application context used by this " +
					"framework servlet [%s]: ", initializerClass.getName(), initializerContextClass.getName(),
					wac.getClass().getName()));
		}
		return BeanUtils.instantiateClass(initializerClass, ApplicationContextInitializer.class);
	}
	catch (Exception ex) {
		throw new IllegalArgumentException(String.format("Could not instantiate class [%s] specified " +
				"via 'contextInitializerClasses' init-param", className), ex);
	}
}
 

/**
 * Customize the {@link ConfigurableWebApplicationContext} created by this
 * ContextLoader after config locations have been supplied to the context
 * but before the context is <em>refreshed</em>.
 * <p>The default implementation {@linkplain #determineContextInitializerClasses(ServletContext)
 * determines} what (if any) context initializer classes have been specified through
 * {@linkplain #CONTEXT_INITIALIZER_CLASSES_PARAM context init parameters} and
 * {@linkplain ApplicationContextInitializer#initialize invokes each} with the
 * given web application context.
 * <p>Any {@code ApplicationContextInitializers} implementing
 * {@link org.springframework.core.Ordered Ordered} or marked with @{@link
 * org.springframework.core.annotation.Order Order} will be sorted appropriately.
 * @param sc the current servlet context
 * @param wac the newly created application context
 * @see #CONTEXT_INITIALIZER_CLASSES_PARAM
 * @see ApplicationContextInitializer#initialize(ConfigurableApplicationContext)
 */
protected void customizeContext(ServletContext sc, ConfigurableWebApplicationContext wac) {
	List<Class<ApplicationContextInitializer<ConfigurableApplicationContext>>> initializerClasses =
			determineContextInitializerClasses(sc);

	for (Class<ApplicationContextInitializer<ConfigurableApplicationContext>> initializerClass : initializerClasses) {
		Class<?> initializerContextClass =
				GenericTypeResolver.resolveTypeArgument(initializerClass, ApplicationContextInitializer.class);
		if (initializerContextClass != null && !initializerContextClass.isInstance(wac)) {
			throw new ApplicationContextException(String.format(
					"Could not apply context initializer [%s] since its generic parameter [%s] " +
					"is not assignable from the type of application context used by this " +
					"context loader: [%s]", initializerClass.getName(), initializerContextClass.getName(),
					wac.getClass().getName()));
		}
		this.contextInitializers.add(BeanUtils.instantiateClass(initializerClass));
	}

	AnnotationAwareOrderComparator.sort(this.contextInitializers);
	for (ApplicationContextInitializer<ConfigurableApplicationContext> initializer : this.contextInitializers) {
		initializer.initialize(wac);
	}
}
 

/**
 * This implementation resolves the type of annotation from generic metadata and
 * validates that (a) the annotation is in fact present on the importing
 * {@code @Configuration} class and (b) that the given annotation has an
 * {@linkplain #getAdviceModeAttributeName() advice mode attribute} of type
 * {@link AdviceMode}.
 * <p>The {@link #selectImports(AdviceMode)} method is then invoked, allowing the
 * concrete implementation to choose imports in a safe and convenient fashion.
 * @throws IllegalArgumentException if expected annotation {@code A} is not present
 * on the importing {@code @Configuration} class or if {@link #selectImports(AdviceMode)}
 * returns {@code null}
 */
@Override
public final String[] selectImports(AnnotationMetadata importingClassMetadata) {
	Class<?> annoType = GenericTypeResolver.resolveTypeArgument(getClass(), AdviceModeImportSelector.class);
	AnnotationAttributes attributes = AnnotationConfigUtils.attributesFor(importingClassMetadata, annoType);
	if (attributes == null) {
		throw new IllegalArgumentException(String.format(
			"@%s is not present on importing class '%s' as expected",
			annoType.getSimpleName(), importingClassMetadata.getClassName()));
	}

	AdviceMode adviceMode = attributes.getEnum(this.getAdviceModeAttributeName());
	String[] imports = selectImports(adviceMode);
	if (imports == null) {
		throw new IllegalArgumentException(String.format("Unknown AdviceMode: '%s'", adviceMode));
	}
	return imports;
}
 

@SuppressWarnings("unchecked")
static Class<? extends Annotation> getAnnotationType(AnnotationFormatterFactory<? extends Annotation> factory) {
	Class<? extends Annotation> annotationType = (Class<? extends Annotation>)
			GenericTypeResolver.resolveTypeArgument(factory.getClass(), AnnotationFormatterFactory.class);
	if (annotationType == null) {
		throw new IllegalArgumentException("Unable to extract parameterized Annotation type argument from " +
				"AnnotationFormatterFactory [" + factory.getClass().getName() +
				"]; does the factory parameterize the <A extends Annotation> generic type?");
	}
	return annotationType;
}
 

/**
 * Default a assembler based on Spring MVC controller, resource type, and {@link LinkRelationProvider}. With this
 * combination of information, resources can be defined.
 *
 * @see #setBasePath(String) to adjust base path to something like "/api"/
 * @param controllerClass - Spring MVC controller to base links off of
 * @param relProvider
 */
public SimpleIdentifiableRepresentationModelAssembler(Class<?> controllerClass, LinkRelationProvider relProvider) {

	this.controllerClass = controllerClass;
	this.relProvider = relProvider;

	// Find the "T" type contained in "T extends Identifiable<?>", e.g.
	// SimpleIdentifiableRepresentationModelAssembler<User> -> User
	this.resourceType = GenericTypeResolver.resolveTypeArgument(this.getClass(),
			SimpleIdentifiableRepresentationModelAssembler.class);
}
 

@SuppressWarnings("unchecked")
private void invokeApplicationContextInitializers(ConfigurableApplicationContext context,
		MergedContextConfiguration mergedConfig) {

	Set<Class<? extends ApplicationContextInitializer<?>>> initializerClasses =
			mergedConfig.getContextInitializerClasses();
	if (initializerClasses.isEmpty()) {
		// no ApplicationContextInitializers have been declared -> nothing to do
		return;
	}

	List<ApplicationContextInitializer<ConfigurableApplicationContext>> initializerInstances = new ArrayList<>();
	Class<?> contextClass = context.getClass();

	for (Class<? extends ApplicationContextInitializer<?>> initializerClass : initializerClasses) {
		Class<?> initializerContextClass =
				GenericTypeResolver.resolveTypeArgument(initializerClass, ApplicationContextInitializer.class);
		if (initializerContextClass != null && !initializerContextClass.isInstance(context)) {
			throw new ApplicationContextException(String.format(
					"Could not apply context initializer [%s] since its generic parameter [%s] " +
					"is not assignable from the type of application context used by this " +
					"context loader: [%s]", initializerClass.getName(), initializerContextClass.getName(),
					contextClass.getName()));
		}
		initializerInstances.add((ApplicationContextInitializer<ConfigurableApplicationContext>) BeanUtils.instantiateClass(initializerClass));
	}

	AnnotationAwareOrderComparator.sort(initializerInstances);
	for (ApplicationContextInitializer<ConfigurableApplicationContext> initializer : initializerInstances) {
		initializer.initialize(context);
	}
}
 

static Class<?> getFieldType(Formatter<?> formatter) {
	Class<?> fieldType = GenericTypeResolver.resolveTypeArgument(formatter.getClass(), Formatter.class);
	if (fieldType == null && formatter instanceof DecoratingProxy) {
		fieldType = GenericTypeResolver.resolveTypeArgument(
				((DecoratingProxy) formatter).getDecoratedClass(), Formatter.class);
	}
	if (fieldType == null) {
		throw new IllegalArgumentException("Unable to extract the parameterized field type from Formatter [" +
				formatter.getClass().getName() + "]; does the class parameterize the <T> generic type?");
	}
	return fieldType;
}
 

@SuppressWarnings("unchecked")
private void invokeApplicationContextInitializers(ConfigurableApplicationContext context,
		MergedContextConfiguration mergedConfig) {
	Set<Class<? extends ApplicationContextInitializer<? extends ConfigurableApplicationContext>>> initializerClasses = mergedConfig.getContextInitializerClasses();
	if (initializerClasses.isEmpty()) {
		// no ApplicationContextInitializers have been declared -> nothing to do
		return;
	}

	List<ApplicationContextInitializer<ConfigurableApplicationContext>> initializerInstances = new ArrayList<ApplicationContextInitializer<ConfigurableApplicationContext>>();
	Class<?> contextClass = context.getClass();

	for (Class<? extends ApplicationContextInitializer<? extends ConfigurableApplicationContext>> initializerClass : initializerClasses) {
		Class<?> initializerContextClass = GenericTypeResolver.resolveTypeArgument(initializerClass,
			ApplicationContextInitializer.class);
		Assert.isAssignable(initializerContextClass, contextClass, String.format(
			"Could not add context initializer [%s] since its generic parameter [%s] "
					+ "is not assignable from the type of application context used by this "
					+ "context loader [%s]: ", initializerClass.getName(), initializerContextClass.getName(),
			contextClass.getName()));
		initializerInstances.add((ApplicationContextInitializer<ConfigurableApplicationContext>) BeanUtils.instantiateClass(initializerClass));
	}

	AnnotationAwareOrderComparator.sort(initializerInstances);
	for (ApplicationContextInitializer<ConfigurableApplicationContext> initializer : initializerInstances) {
		initializer.initialize(context);
	}
}
 

private void applyInitializers(ConfigurableApplicationContext context) {
    for (ApplicationContextInitializer initializer : getInitializers()) {
        Class<?> requiredType = GenericTypeResolver.resolveTypeArgument(
                initializer.getClass(), ApplicationContextInitializer.class);
        Assert.isInstanceOf(requiredType, context, "Unable to call initializer.");
        initializer.initialize(context);
    }
}
 

@SuppressWarnings("unchecked")
static Class<? extends Annotation> getAnnotationType(AnnotationFormatterFactory<? extends Annotation> factory) {
	Class<? extends Annotation> annotationType = (Class<? extends Annotation>)
			GenericTypeResolver.resolveTypeArgument(factory.getClass(), AnnotationFormatterFactory.class);
	if (annotationType == null) {
		throw new IllegalArgumentException("Unable to extract parameterized Annotation type argument from " +
				"AnnotationFormatterFactory [" + factory.getClass().getName() +
				"]; does the factory parameterize the <A extends Annotation> generic type?");
	}
	return annotationType;
}
 

EventBusListenerWrapper(EventBus owningEventBus, EventBusListener<?> listenerTarget, String topic, boolean includingPropagatingEvents) {
    super(owningEventBus, listenerTarget, topic, includingPropagatingEvents);
    payloadType = GenericTypeResolver.resolveTypeArgument(listenerTarget.getClass(), EventBusListener.class);
    Assert.notNull(payloadType, "Could not resolve payload type");
}
 

/**
 * Creates a new {@link AbstractDynamoDBEventListener}.
 */
public AbstractDynamoDBEventListener() {
	Class<?> typeArgument = GenericTypeResolver.resolveTypeArgument(
			this.getClass(), AbstractDynamoDBEventListener.class);
	this.domainClass = typeArgument == null ? Object.class : typeArgument;
}
 

private <T extends PluginChannel.PluginMessage> boolean messageTypeMatches(T pluginMessage, PluginChannel<?> pluginChannel) {
    Class<?> messageClass = GenericTypeResolver.resolveTypeArgument(pluginChannel.getClass(), PluginChannel.class);

    return pluginMessage.getClass().equals(messageClass);
}
 

public static void main(String[] args) {
    Class<?> resolveTypeArgument = GenericTypeResolver.resolveTypeArgument(VersionAction.class, RpcAction.class);
    System.out.println(resolveTypeArgument);
}
 

@SuppressWarnings("unchecked")
protected SpringFactoryImportSelector() {
	this.annotationClass = (Class<T>) GenericTypeResolver
			.resolveTypeArgument(this.getClass(), SpringFactoryImportSelector.class);
}
 

@Nullable
private Class<?> resolvePrinterObjectType(Printer<?> printer) {
	return GenericTypeResolver.resolveTypeArgument(printer.getClass(), Printer.class);
}