Jackson2JavaTypeMapper (Spring AMQP 2.4.2 API)

All Superinterfaces:

ClassMapper

All Known Implementing Classes:

DefaultJackson2JavaTypeMapper
```
public interface Jackson2JavaTypeMapper
extends ClassMapper
```
Strategy for setting metadata on messages such that one can create the class that needs to be instantiated when receiving a message.

Author:

Mark Pollack, James Carr, Sam Nelson, Andreas Asplund, Gary Russell

Nested Class Summary

Nested Classes
Modifier and Type	Interface	Description
`static class`	`Jackson2JavaTypeMapper.TypePrecedence`	The precedence for type conversion - inferred from the method parameter or message headers.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`default void`	`addTrustedPackages(String... packages)`	Add trusted packages.
`void`	`fromJavaType(com.fasterxml.jackson.databind.JavaType javaType, MessageProperties properties)`	Set the message properties according to the type.
`com.fasterxml.jackson.databind.JavaType`	`getInferredType(MessageProperties properties)`	Return the inferred type, if the type precedence is inferred and the header is present.
`Jackson2JavaTypeMapper.TypePrecedence`	`getTypePrecedence()`	Get the type precedence.
`com.fasterxml.jackson.databind.JavaType`	`toJavaType(MessageProperties properties)`	Determine the type from the message properties.

Methods inherited from interface org.springframework.amqp.support.converter.ClassMapper
fromClass, toClass

- Method Detail
  - fromJavaType
```
void fromJavaType(com.fasterxml.jackson.databind.JavaType javaType,
                  MessageProperties properties)
```
    Set the message properties according to the type.
    
    Parameters:
    
    javaType - the type.
    
    properties - the properties.
  - toJavaType
```
com.fasterxml.jackson.databind.JavaType toJavaType(MessageProperties properties)
```
    Determine the type from the message properties.
    
    Parameters:
    
    properties - the properties.
    
    Returns:
    
    the type.
  - getTypePrecedence
```
Jackson2JavaTypeMapper.TypePrecedence getTypePrecedence()
```
    Get the type precedence.
    
    Returns:
    
    the precedence.
    
    Since:
    
    1.6
  - addTrustedPackages
```
default void addTrustedPackages(String... packages)
```
    Add trusted packages.
    
    Parameters:
    
    packages - the packages.
    
    Since:
    
    2.1
  - getInferredType
```
@Nullable
com.fasterxml.jackson.databind.JavaType getInferredType(MessageProperties properties)
```
    Return the inferred type, if the type precedence is inferred and the header is present.
    
    Parameters:
    
    properties - the message properties.
    
    Returns:
    
    the type.
    
    Since:
    
    2.2