com.facebook.presto.jdbc.internal.jackson.databind.ser.ContextualSerializer Maven / Gradle / Ivy
package com.facebook.presto.jdbc.internal.jackson.databind.ser;
import com.facebook.presto.jdbc.internal.jackson.databind.*;
/**
* Add-on interface that {@link JsonSerializer}s can implement to get a callback
* that can be used to create contextual instances of serializer to use for
* handling properties of supported type. This can be useful
* for serializers that can be configured by annotations, or should otherwise
* have differing behavior depending on what kind of property is being serialized.
*
* Note that in cases where serializer needs both contextualization and
* resolution -- that is, implements both this interface and {@link ResolvableSerializer}
* -- resolution via {@link ResolvableSerializer} occurs first, and contextual
* resolution (via this interface) later on.
*/
public interface ContextualSerializer
{
/**
* Method called to see if a different (or differently configured) serializer
* is needed to serialize values of specified property.
* Note that instance that this method is called on is typically shared one and
* as a result method should NOT modify this instance but rather construct
* and return a new instance. This instance should only be returned as-is, in case
* it is already suitable for use.
*
* @param prov Serializer provider to use for accessing config, other serializers
* @param property Method or field that represents the property
* (and is used to access value to serialize).
* Should be available; but there may be cases where caller cannot provide it and
* null is passed instead (in which case impls usually pass 'this' serializer as is)
*
* @return Serializer to use for serializing values of specified property;
* may be this instance or a new instance.
*
* @throws JsonMappingException
*/
public JsonSerializer createContextual(SerializerProvider prov, BeanProperty property)
throws JsonMappingException;
}