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package org.codehaus.jackson.map;
import org.codehaus.jackson.JsonGenerator;
import org.codehaus.jackson.JsonParser;
import org.codehaus.jackson.Version;
import org.codehaus.jackson.Versioned;
import org.codehaus.jackson.map.deser.BeanDeserializerModifier;
import org.codehaus.jackson.map.deser.ValueInstantiators;
import org.codehaus.jackson.map.ser.BeanSerializerModifier;
import org.codehaus.jackson.map.type.TypeModifier;
/**
* Simple interface for extensions that can be registered with {@link ObjectMapper}
* to provide a well-defined set of extensions to default functionality; such as
* support for new data types.
*
* @since 1.7
*/
public abstract class Module
implements Versioned
{
/*
/**********************************************************
/* Simple accessors
/**********************************************************
*/
/**
* Method that returns identifier for module; this can be used by Jackson
* for informational purposes, as well as in associating extensions with
* module that provides them.
*/
public abstract String getModuleName();
/**
* Method that returns version of this module. Can be used by Jackson for
* informational purposes.
*/
@Override
public abstract Version version();
/*
/**********************************************************
/* Life-cycle: registration
/**********************************************************
*/
/**
* Method called by {@link ObjectMapper} when module is registered.
* It is called to let module register functionality it provides,
* using callback methods passed-in context object exposes.
*/
public abstract void setupModule(SetupContext context);
/*
/**********************************************************
/* Helper types
/**********************************************************
*/
/**
* Interface Jackson exposes to modules for purpose of registering
* extended functionality.
*/
public interface SetupContext
{
/*
/**********************************************************
/* Simple accessors
/**********************************************************
*/
/**
* Method that returns version information about {@link ObjectMapper}
* that implements this context. Modules can use this to choose
* different settings or initialization order; or even decide to fail
* set up completely if version is compatible with module.
*/
public Version getMapperVersion();
/**
* Method that returns current deserialization configuration
* settings. Since modules may be interested in these settings,
* caller should make sure to make changes to settings before
* module registrations.
*/
public DeserializationConfig getDeserializationConfig();
/**
* Method that returns current serialization configuration
* settings. Since modules may be interested in these settings,
* caller should make sure to make changes to settings before
* module registrations.
*
* @since 1.7.1 (1.7.0 unfortunately had a typo in method name!)
*/
public SerializationConfig getSerializationConfig();
/**
* @since 1.9.0
*/
public boolean isEnabled(DeserializationConfig.Feature f);
/**
* @since 1.9.0
*/
public boolean isEnabled(SerializationConfig.Feature f);
/**
* @since 1.9.0
*/
public boolean isEnabled(JsonParser.Feature f);
/**
* @since 1.9.0
*/
public boolean isEnabled(JsonGenerator.Feature f);
/*
/**********************************************************
/* Handler registration; serializers/deserializers
/**********************************************************
*/
/**
* Method that module can use to register additional deserializers to use for
* handling types.
*
* @param d Object that can be called to find deserializer for types supported
* by module (null returned for non-supported types)
*/
public void addDeserializers(Deserializers d);
/**
* Method that module can use to register additional deserializers to use for
* handling Map key values (which are separate from value deserializers because
* they are always serialized from String values)
*
* @since 1.8
*/
public void addKeyDeserializers(KeyDeserializers s);
/**
* Method that module can use to register additional serializers to use for
* handling types.
*
* @param s Object that can be called to find serializer for types supported
* by module (null returned for non-supported types)
*/
public void addSerializers(Serializers s);
/**
* Method that module can use to register additional serializers to use for
* handling Map key values (which are separate from value serializers because
* they must write JsonToken.FIELD_NAME instead of String value).
*
* @since 1.8
*/
public void addKeySerializers(Serializers s);
/*
/**********************************************************
/* Handler registration; other
/**********************************************************
*/
/**
* Method that module can use to register additional modifier objects to
* customize configuration and construction of bean deserializers.
*
* @param mod Modifier to register
*/
public void addBeanDeserializerModifier(BeanDeserializerModifier mod);
/**
* Method that module can use to register additional modifier objects to
* customize configuration and construction of bean serializers.
*
* @param mod Modifier to register
*/
public void addBeanSerializerModifier(BeanSerializerModifier mod);
/**
* Method that module can use to register additional
* {@link AbstractTypeResolver} instance, to handle resolution of
* abstract to concrete types (either by defaulting, or by materializing).
*
* @param resolver Resolver to add.
*
* @since 1.8
*/
public void addAbstractTypeResolver(AbstractTypeResolver resolver);
/**
* Method that module can use to register additional
* {@link TypeModifier} instance, which can augment {@link org.codehaus.jackson.type.JavaType}
* instances constructed by {@link org.codehaus.jackson.map.type.TypeFactory}.
*
* @param modifier to add
*
* @since 1.8
*/
public void addTypeModifier(TypeModifier modifier);
/**
* Method that module can use to register additional {@link org.codehaus.jackson.map.deser.ValueInstantiator}s,
* by adding {@link ValueInstantiators} object that gets called when
* instantatiator is needed by a deserializer.
*
* @param instantiators Object that can provide {@link org.codehaus.jackson.map.deser.ValueInstantiator}s for
* constructing POJO values during deserialization
*
* @since 1.9
*/
public void addValueInstantiators(ValueInstantiators instantiators);
/**
* Method for registering specified {@link AnnotationIntrospector} as the highest
* priority introspector (will be chained with existing introspector(s) which
* will be used as fallbacks for cases this introspector does not handle)
*
* @param ai Annotation introspector to register.
*/
public void insertAnnotationIntrospector(AnnotationIntrospector ai);
/**
* Method for registering specified {@link AnnotationIntrospector} as the lowest
* priority introspector, chained with existing introspector(s) and called
* as fallback for cases not otherwise handled.
*
* @param ai Annotation introspector to register.
*/
public void appendAnnotationIntrospector(AnnotationIntrospector ai);
/**
* Method used for defining mix-in annotations to use for augmenting
* specified class or interface.
* All annotations from
* mixinSource are taken to override annotations
* that target (or its supertypes) has.
*
* Note: mix-ins are registered both for serialization and deserialization
* (which can be different internally).
*
* Note: currently only one set of mix-in annotations can be defined for
* a single class; so if multiple modules register mix-ins, highest
* priority one (last one registered) will have priority over other modules.
*
* @param target Class (or interface) whose annotations to effectively override
* @param mixinSource Class (or interface) whose annotations are to
* be "added" to target's annotations, overriding as necessary
*/
public void setMixInAnnotations(Class target, Class mixinSource);
}
}