org.springframework.data.redis.serializer

Class Jackson2JsonRedisSerializer<T>

java.lang.Object

org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer<T>

All Implemented Interfaces:

RedisSerializer<T>

public class Jackson2JsonRedisSerializer<T>
extends Object
implements RedisSerializer<T>

RedisSerializer that can read and write JSON using Jackson's and Jackson Databind ObjectMapper.

This converter can be used to bind to typed beans, or untyped HashMap instances. Note:Null objects are serialized as empty arrays and vice versa.

Since:

1.2

Author:

Thomas Darimont

Field Summary

Fields

Modifier and Type	Field and Description
static Charset	DEFAULT_CHARSET

Constructor Summary

Constructors

Constructor and Description
Jackson2JsonRedisSerializer(Class<T> type) Creates a new Jackson2JsonRedisSerializer for the given target Class.
Jackson2JsonRedisSerializer(com.fasterxml.jackson.databind.JavaType javaType) Creates a new Jackson2JsonRedisSerializer for the given target JavaType.

Method Summary

Modifier and Type	Method and Description
T	deserialize(byte[] bytes) Deserialize an object from the given binary data.
protected com.fasterxml.jackson.databind.JavaType	getJavaType(Class<?> clazz) Returns the Jackson JavaType for the specific class.
byte[]	serialize(Object t) Serialize the given object to binary data.
void	setObjectMapper(com.fasterxml.jackson.databind.ObjectMapper objectMapper) Sets the ObjectMapper for this view.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT_CHARSET

public static final Charset DEFAULT_CHARSET

Constructor Detail

Jackson2JsonRedisSerializer

public Jackson2JsonRedisSerializer(Class<T> type)

Creates a new Jackson2JsonRedisSerializer for the given target Class.

Parameters:

type -

Jackson2JsonRedisSerializer

public Jackson2JsonRedisSerializer(com.fasterxml.jackson.databind.JavaType javaType)

Creates a new Jackson2JsonRedisSerializer for the given target JavaType.

Parameters:

javaType -

Method Detail

deserialize

public T deserialize(byte[] bytes)
              throws SerializationException

Description copied from interface: RedisSerializer

Deserialize an object from the given binary data.

Specified by:

deserialize in interface RedisSerializer<T>

Parameters:

bytes - object binary representation

Returns:

the equivalent object instance

Throws:

SerializationException

serialize

public byte[] serialize(Object t)
                 throws SerializationException

Description copied from interface: RedisSerializer

Serialize the given object to binary data.

Specified by:

serialize in interface RedisSerializer<T>

Parameters:

t - object to serialize

Returns:

the equivalent binary data

Throws:

SerializationException

setObjectMapper

public void setObjectMapper(com.fasterxml.jackson.databind.ObjectMapper objectMapper)

Sets the ObjectMapper for this view. If not set, a default ObjectMapper is used.

Setting a custom-configured ObjectMapper is one way to take further control of the JSON serialization process. For example, an extended SerializerFactory can be configured that provides custom serializers for specific types. The other option for refining the serialization process is to use Jackson's provided annotations on the types to be serialized, in which case a custom-configured ObjectMapper is unnecessary.

getJavaType

protected com.fasterxml.jackson.databind.JavaType getJavaType(Class<?> clazz)

Returns the Jackson JavaType for the specific class.

Default implementation returns TypeFactory.constructType(java.lang.reflect.Type), but this can be overridden in subclasses, to allow for custom generic collection handling. For instance:

 protected JavaType getJavaType(Class<?> clazz) {
        if (List.class.isAssignableFrom(clazz)) {
                return TypeFactory.defaultInstance().constructCollectionType(ArrayList.class, MyBean.class);
        } else {
                return super.getJavaType(clazz);
        }
 }
 

Parameters:

clazz - the class to return the java type for

Returns:

the java type