MessageBuilder.setExpirationDate(expirationDate) should be marked as @Nullable

[mrpiggi]

As

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

Lines 50 to 59 in 098ba3e

	public AbstractIntegrationMessageBuilder<T> setExpirationDate(@Nullable Date expirationDate) {
	if (expirationDate != null) {
	return setHeader(IntegrationMessageHeaderAccessor.EXPIRATION_DATE, expirationDate.getTime());
	}
	else {
	return setHeader(IntegrationMessageHeaderAccessor.EXPIRATION_DATE, null);
	}
	}

is marked as @Nullable expirationDate this should also be valid for

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

Lines 46 to 50 in 098ba3e

	public AbstractIntegrationMessageBuilder<T> setExpirationDate(Long expirationDate) {
	return setHeader(IntegrationMessageHeaderAccessor.EXPIRATION_DATE, expirationDate);
	}

as well as

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

Lines 242 to 254 in 098ba3e

	@Override
	public MessageBuilder<T> setExpirationDate(Long expirationDate) {
	super.setExpirationDate(expirationDate);
	return this;
	}
	@Override
	public MessageBuilder<T> setExpirationDate(Date expirationDate) {
	super.setExpirationDate(expirationDate);
	return this;
	}