com.fasterxml.jackson.databind.type

Class MapLikeType

java.lang.Object

com.fasterxml.jackson.core.type.ResolvedType

com.fasterxml.jackson.databind.JavaType

com.fasterxml.jackson.databind.type.TypeBase

com.fasterxml.jackson.databind.type.MapLikeType

All Implemented Interfaces:

JsonSerializable, Serializable, Type

Direct Known Subclasses:

MapType

public class MapLikeType
extends TypeBase

Type that represents Map-like types; things that consist of key/value pairs but that do not necessarily implement Map, but that do not have enough introspection functionality to allow for some level of generic handling. This specifically allows framework to check for configuration and annotation settings used for Map types, and pass these to custom handlers that may be more familiar with actual type.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected JavaType	_keyType Type of keys of Map.
protected JavaType	_valueType Type of values of Map.

Fields inherited from class com.fasterxml.jackson.databind.JavaType

_asStatic, _class, _hash, _typeHandler, _valueHandler

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	MapLikeType(Class<?> mapType, JavaType keyT, JavaType valueT, Object valueHandler, Object typeHandler, boolean asStatic)

Method Summary

Methods

Modifier and Type	Method and Description
protected JavaType	_narrow(Class<?> subclass)
protected String	buildCanonicalName()
static MapLikeType	construct(Class<?> rawType, JavaType keyT, JavaType valueT)
JavaType	containedType(int index)
int	containedTypeCount()
String	containedTypeName(int index) Not sure if we should count on this, but type names for core interfaces are "K" and "V" respectively.
boolean	equals(Object o)
JavaType	getContentType()
StringBuilder	getErasedSignature(StringBuilder sb) Method for accessing signature without generic type information, in form compatible with all versions of JVM, and specifically used for type descriptions when generating byte code.
StringBuilder	getGenericSignature(StringBuilder sb)
JavaType	getKeyType()
Class<?>	getParameterSource()
boolean	isContainerType()
boolean	isMapLikeType()
boolean	isTrueMapType() Method that can be used for checking whether this type is a "real" Collection type; meaning whether it represents a parameterized subtype of Collection or just something that acts like one.
JavaType	narrowContentsBy(Class<?> contentClass)
JavaType	narrowKey(Class<?> keySubclass)
String	toString()
JavaType	widenContentsBy(Class<?> contentClass)
JavaType	widenKey(Class<?> keySubclass)
MapLikeType	withContentTypeHandler(Object h) "Copy method" that will construct a new instance that is identical to this instance, except that its content type will have specified type handler assigned.
MapLikeType	withContentValueHandler(Object h) "Copy method" that will construct a new instance that is identical to this instance, except that it will have specified content value handler assigned.
MapLikeType	withKeyTypeHandler(Object h)
MapLikeType	withKeyValueHandler(Object h)
MapLikeType	withStaticTyping() Method that can be called to get a type instance that indicates that values of the type should be handled using "static typing" for purposes of serialization (as opposed to "dynamic" aka runtime typing): meaning that no runtime information is needed for determining serializers to use.
MapLikeType	withTypeHandler(Object h) "Copy method" that will construct a new instance that is identical to this instance, except that it will have specified type handler assigned.
MapLikeType	withValueHandler(Object h) "Copy method" that will construct a new instance that is identical to this instance, except that it will have specified value handler assigned.

Methods inherited from class com.fasterxml.jackson.databind.type.TypeBase

_classSignature, getTypeHandler, getValueHandler, serialize, serializeWithType, toCanonical

Methods inherited from class com.fasterxml.jackson.databind.JavaType

_assertSubclass, _widen, containedTypeOrUnknown, forcedNarrowBy, getErasedSignature, getGenericSignature, getRawClass, hasGenericTypes, hashCode, hasRawClass, isAbstract, isArrayType, isCollectionLikeType, isConcrete, isEnumType, isFinal, isInterface, isPrimitive, isThrowable, narrowBy, useStaticType, widenBy

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

_keyType

protected final JavaType _keyType

Type of keys of Map.

_valueType

protected final JavaType _valueType

Type of values of Map.

Constructor Detail

MapLikeType

protected MapLikeType(Class<?> mapType,
           JavaType keyT,
           JavaType valueT,
           Object valueHandler,
           Object typeHandler,
           boolean asStatic)

Method Detail

construct

public static MapLikeType construct(Class<?> rawType,
                    JavaType keyT,
                    JavaType valueT)

_narrow

protected JavaType _narrow(Class<?> subclass)

Specified by:

_narrow in class JavaType

narrowContentsBy

public JavaType narrowContentsBy(Class<?> contentClass)

Specified by:

narrowContentsBy in class JavaType

widenContentsBy

public JavaType widenContentsBy(Class<?> contentClass)

Specified by:

widenContentsBy in class JavaType

narrowKey

public JavaType narrowKey(Class<?> keySubclass)

widenKey

public JavaType widenKey(Class<?> keySubclass)

withTypeHandler

public MapLikeType withTypeHandler(Object h)

Description copied from class: JavaType

"Copy method" that will construct a new instance that is identical to this instance, except that it will have specified type handler assigned.

Specified by:

withTypeHandler in class JavaType

Returns:

Newly created type instance

withContentTypeHandler

public MapLikeType withContentTypeHandler(Object h)

Description copied from class: JavaType

"Copy method" that will construct a new instance that is identical to this instance, except that its content type will have specified type handler assigned.

Specified by:

withContentTypeHandler in class JavaType

Returns:

Newly created type instance

withValueHandler

public MapLikeType withValueHandler(Object h)

Description copied from class: JavaType

"Copy method" that will construct a new instance that is identical to this instance, except that it will have specified value handler assigned.

Specified by:

withValueHandler in class JavaType

Returns:

Newly created type instance

withContentValueHandler

public MapLikeType withContentValueHandler(Object h)

Description copied from class: JavaType

"Copy method" that will construct a new instance that is identical to this instance, except that it will have specified content value handler assigned.

Specified by:

withContentValueHandler in class JavaType

Returns:

Newly created type instance

withStaticTyping

public MapLikeType withStaticTyping()

Description copied from class: JavaType

Method that can be called to get a type instance that indicates that values of the type should be handled using "static typing" for purposes of serialization (as opposed to "dynamic" aka runtime typing): meaning that no runtime information is needed for determining serializers to use. The main use case is to allow forcing of specific root value serialization type, and specifically in resolving serializers for contained types (element types for arrays, Collections and Maps).

Specified by:

withStaticTyping in class JavaType

buildCanonicalName

protected String buildCanonicalName()

Specified by:

buildCanonicalName in class TypeBase

isContainerType

public boolean isContainerType()

Specified by:

isContainerType in class JavaType

Returns:

True if type represented is a container type; this includes array, Map and Collection types.

isMapLikeType

public boolean isMapLikeType()

Overrides:

isMapLikeType in class JavaType

Returns:

True if type is either true Map type, or something similar (meaning it has at least two type parameter; first one describing key type, second value type)

getKeyType

public JavaType getKeyType()

Overrides:

getKeyType in class JavaType

getContentType

public JavaType getContentType()

Overrides:

getContentType in class JavaType

containedTypeCount

public int containedTypeCount()

Overrides:

containedTypeCount in class JavaType

containedType

public JavaType containedType(int index)

Overrides:

containedType in class JavaType

containedTypeName

public String containedTypeName(int index)

Not sure if we should count on this, but type names for core interfaces are "K" and "V" respectively. For now let's assume this should work.

Overrides:

containedTypeName in class JavaType

getParameterSource

public Class<?> getParameterSource()

Specified by:

getParameterSource in class JavaType

getErasedSignature

public StringBuilder getErasedSignature(StringBuilder sb)

Description copied from class: JavaType

Method for accessing signature without generic type information, in form compatible with all versions of JVM, and specifically used for type descriptions when generating byte code.

Specified by:

getErasedSignature in class TypeBase

Parameters:

sb - StringBuilder to append signature to

Returns:

StringBuilder that was passed in; returned to allow call chaining

getGenericSignature

public StringBuilder getGenericSignature(StringBuilder sb)

Specified by:

getGenericSignature in class TypeBase

Parameters:

sb - StringBuilder to append signature to

Returns:

StringBuilder that was passed in; returned to allow call chaining

withKeyTypeHandler

public MapLikeType withKeyTypeHandler(Object h)

withKeyValueHandler

public MapLikeType withKeyValueHandler(Object h)

isTrueMapType

public boolean isTrueMapType()

Method that can be used for checking whether this type is a "real" Collection type; meaning whether it represents a parameterized subtype of Collection or just something that acts like one.

toString

public String toString()

Specified by:

toString in class JavaType

equals

public boolean equals(Object o)

Specified by:

equals in class JavaType