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Support Optional in AbstractJackson2HttpMessageConverter

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This commit introduces support for Optional in the
AbstractJackson2HttpMessageConverter, similar the existing support for
collection types were supported.

Closes gh-24498
This commit is contained in:
Arjen Poutsma
2023-01-24 13:06:41 +01:00
parent ab9bea1d93
commit 5502e61519
2 changed files with 31 additions and 3 deletions
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5
spring-web/src/main/java/org/springframework/http/converter/json/AbstractJackson2HttpMessageConverter.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2002-2022 the original author or authors.
* Copyright 2002-2023 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -30,6 +30,7 @@ import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.atomic.AtomicReference;
import java.util.function.Consumer;
@@ -471,7 +472,7 @@ public abstract class AbstractJackson2HttpMessageConverter extends AbstractGener
if (filters != null) {
objectWriter = objectWriter.with(filters);
}
if (javaType != null && javaType.isContainerType()) {
if (javaType != null && (javaType.isContainerType() || javaType.isTypeOrSubTypeOf(Optional.class))) {
objectWriter = objectWriter.forType(javaType);
}
SerializationConfig config = objectWriter.getConfig();