Remove @Nullable

Signed-off-by: Tran Ngoc Nhan <ngocnhan.tran1996@gmail.com>

Author: ngocnhan-tran1996

spring-integration-core/src/main/java/org/springframework/integration/context/IntegrationObjectSupport.java

@@ -142,9 +142,8 @@ public void setComponentName(String componentName) {
 	 * Subclasses may implement this method to provide component type information.
 	 */
 	@Override
-	@Nullable
 	public String getComponentType() {
-		return null;
+		return "integration-object-support";
 	}
 
 	@Override

spring-integration-core/src/main/java/org/springframework/integration/support/channel/BeanFactoryChannelResolver.java

@@ -53,7 +53,8 @@ public class BeanFactoryChannelResolver implements DestinationResolver<MessageCh
 
 	private final Lock lock = new ReentrantLock();
 
-	private @Nullable BeanFactory beanFactory;
+	@SuppressWarnings("NullAway.Init")
+	private BeanFactory beanFactory;
 
 	private @Nullable HeaderChannelRegistry replyChannelRegistry;
 
@@ -90,7 +91,6 @@ public void setBeanFactory(BeanFactory beanFactory) {
 
 	@Override
 	public MessageChannel resolveDestination(String name) {
-		Assert.state(this.beanFactory != null, "BeanFactory is required");
 		try {
 			return this.beanFactory.getBean(name, MessageChannel.class);
 		}

spring-integration-core/src/main/java/org/springframework/integration/support/context/NamedComponent.java

@@ -28,7 +28,6 @@ public interface NamedComponent {
 
 	String getComponentName();
 
-	@Nullable
 	String getComponentType();
 
 	default String getBeanName() {