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Consistent use of @Nullable across the codebase (even for internals)

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Beyond just formally declaring the current behavior, this revision actually enforces non-null behavior in selected signatures now, not tolerating null values anymore when not explicitly documented. It also changes some utility methods with historic null-in/null-out tolerance towards enforced non-null return values, making them a proper citizen in non-null assignments.

Some issues are left as to-do: in particular a thorough revision of spring-test, and a few tests with unclear failures (ignored as "TODO: NULLABLE") to be sorted out in a follow-up commit.

Issue: SPR-15540
This commit is contained in:
Juergen Hoeller
2017-06-07 14:17:48 +02:00
parent ffc3f6d87d
commit f813712f5b
1493 changed files with 10670 additions and 9172 deletions
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15
spring-webflux/src/test/java/org/springframework/web/reactive/result/method/annotation/MessageWriterResultHandlerTests.java
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@@ -42,8 +42,8 @@ import org.springframework.core.codec.CharSequenceEncoder;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.http.codec.EncoderHttpMessageWriter;
import org.springframework.http.codec.ResourceHttpMessageWriter;
import org.springframework.http.codec.HttpMessageWriter;
import org.springframework.http.codec.ResourceHttpMessageWriter;
import org.springframework.http.codec.json.Jackson2JsonEncoder;
import org.springframework.http.codec.xml.Jaxb2XmlEncoder;
import org.springframework.mock.http.server.reactive.test.MockServerHttpRequest;
@@ -52,16 +52,15 @@ import org.springframework.util.ObjectUtils;
import org.springframework.web.reactive.accept.RequestedContentTypeResolver;
import org.springframework.web.reactive.accept.RequestedContentTypeResolverBuilder;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.springframework.core.io.buffer.support.DataBufferTestUtils.dumpString;
import static org.springframework.http.MediaType.APPLICATION_JSON;
import static org.springframework.http.MediaType.APPLICATION_JSON_UTF8;
import static org.springframework.web.method.ResolvableMethod.on;
import static org.springframework.web.reactive.HandlerMapping.PRODUCIBLE_MEDIA_TYPES_ATTRIBUTE;
import static org.junit.Assert.*;
import static org.springframework.core.io.buffer.support.DataBufferTestUtils.*;
import static org.springframework.http.MediaType.*;
import static org.springframework.web.method.ResolvableMethod.*;
import static org.springframework.web.reactive.HandlerMapping.*;
/**
* Unit tests for {@link AbstractMessageWriterResultHandler}.
*
* @author Rossen Stoyanchev
*/
public class MessageWriterResultHandlerTests {