Spring/spring-data-redis
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

DATAREDIS-865 - Expose GenericJackson2JsonRedisSerializer.registerNullValueSerializer() for ObjectMapper customization.

Browse Source 
We now expose registerNullValueSerializer(…) on GenericJackson2JsonRedisSerializer to allow customization of an externally provided ObjectMapper. NullValueSerializer was previously registered only within a constructor that takes classPropertyTypeName and provided no further possibilities to customize ObjectMapper.

Code wishing to provide a custom ObjectMapper can now call GenericJackson2JsonRedisSerializer.registerNullValueSerializer(objectMapper, …) and perform additional customizations before using ObjectMapper with GenericJackson2JsonRedisSerializer.

Original Pull Request: #376
This commit is contained in:
Mark Paluch
2018-12-06 09:59:45 +01:00
committed by Christoph Strobl
parent ed79d14355
commit 1f4bb973ea
2 changed files with 45 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
src/main/java/org/springframework/data/redis/serializer/GenericJackson2JsonRedisSerializer.java
View File

@@ -34,7 +34,10 @@ import com.fasterxml.jackson.databind.ser.SerializerFactory;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;
/**
* Generic Jackson 2-based {@link RedisSerializer} that maps {@link Object objects} to JSON using dynamic typing.
*
* @author Christoph Strobl
* @author Mark Paluch
* @since 1.6
*/
public class GenericJackson2JsonRedisSerializer implements RedisSerializer<Object> {
@@ -61,7 +64,7 @@ public class GenericJackson2JsonRedisSerializer implements RedisSerializer<Objec
// simply setting {@code mapper.disable(SerializationFeature.FAIL_ON_EMPTY_BEANS)} does not help here since we need
// the type hint embedded for deserialization using the default typing feature.
mapper.registerModule(new SimpleModule().addSerializer(new NullValueSerializer(classPropertyTypeName)));
registerNullValueSerializer(mapper, classPropertyTypeName);
if (StringUtils.hasText(classPropertyTypeName)) {
mapper.enableDefaultTypingAsProperty(DefaultTyping.NON_FINAL, classPropertyTypeName);
@@ -83,6 +86,22 @@ public class GenericJackson2JsonRedisSerializer implements RedisSerializer<Objec
this.mapper = mapper;
}
/**
* Register {@link NullValueSerializer} in the given {@link ObjectMapper} with an optional
* {@code classPropertyTypeName}. This method should be called by code that customizes
* {@link GenericJackson2JsonRedisSerializer} by providing an external {@link ObjectMapper}.
*
* @param objectMapper the object mapper to customize.
* @param classPropertyTypeName name of the type property. Defaults to {@code @class} if {@literal null}/empty.
* @since 2.2
*/
public static void registerNullValueSerializer(ObjectMapper objectMapper, @Nullable String classPropertyTypeName) {
// simply setting {@code mapper.disable(SerializationFeature.FAIL_ON_EMPTY_BEANS)} does not help here since we need
// the type hint embedded for deserialization using the default typing feature.
objectMapper.registerModule(new SimpleModule().addSerializer(new NullValueSerializer(classPropertyTypeName)));
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.serializer.RedisSerializer#serialize(java.lang.Object)
@@ -140,7 +159,7 @@ public class GenericJackson2JsonRedisSerializer implements RedisSerializer<Objec
* @author Christoph Strobl
* @since 1.8
*/
private class NullValueSerializer extends StdSerializer<NullValue> {
private static class NullValueSerializer extends StdSerializer<NullValue> {
private static final long serialVersionUID = 1999052150548658808L;
private final String classIdentifier;