com.fasterxml.jackson.databind.type

Class ArrayType

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.ArrayType

All Implemented Interfaces:

JsonSerializable, Serializable, Type

public final class ArrayType
extends TypeBase

Array types represent Java arrays, both primitive and object valued. Further, Object-valued arrays can have element type of any other legal JavaType.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected JavaType	_componentType Type of elements in the array.
protected Object	_emptyArray We will also keep track of shareable instance of empty array, since it usually needs to be constructed any way; and because it is essentially immutable and thus can be shared.

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

_asStatic, _class, _hash, _typeHandler, _valueHandler

Method Summary

Methods

Modifier and Type	Method and Description
protected JavaType	_narrow(Class<?> subclass) Handling of narrowing conversions for arrays is trickier: for now, it is not even allowed.
protected String	buildCanonicalName()
static ArrayType	construct(JavaType componentType, Object valueHandler, Object typeHandler)
JavaType	containedType(int index)
int	containedTypeCount()
String	containedTypeName(int index) Not sure what symbolic name is used internally, if any; let's follow naming of Collection types here.
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)
Class<?>	getParameterSource() No parameterization for array types themselves; element type may obviously have parameterization.
boolean	hasGenericTypes()
boolean	isAbstract() For some odd reason, modifiers for array classes would claim they are abstract types.
boolean	isArrayType()
boolean	isConcrete() For some odd reason, modifiers for array classes would claim they are abstract types.
boolean	isContainerType()
JavaType	narrowContentsBy(Class<?> contentClass) For array types, both main type and content type can be modified; but ultimately they are interchangeable.
String	toString()
JavaType	widenContentsBy(Class<?> contentClass)
ArrayType	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.
ArrayType	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.
ArrayType	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.
ArrayType	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.
ArrayType	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, getKeyType, getRawClass, hashCode, hasRawClass, isCollectionLikeType, isEnumType, isFinal, isInterface, isMapLikeType, isPrimitive, isThrowable, narrowBy, useStaticType, widenBy

Methods inherited from class java.lang.Object

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

Field Detail

_componentType

protected final JavaType _componentType

Type of elements in the array.

_emptyArray

protected final Object _emptyArray

We will also keep track of shareable instance of empty array, since it usually needs to be constructed any way; and because it is essentially immutable and thus can be shared.

Method Detail

construct

public static ArrayType construct(JavaType componentType,
                  Object valueHandler,
                  Object typeHandler)

withTypeHandler

public ArrayType 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 ArrayType 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 ArrayType 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 ArrayType 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 ArrayType 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

_narrow

protected JavaType _narrow(Class<?> subclass)

Handling of narrowing conversions for arrays is trickier: for now, it is not even allowed.

Specified by:

_narrow in class JavaType

narrowContentsBy

public JavaType narrowContentsBy(Class<?> contentClass)

For array types, both main type and content type can be modified; but ultimately they are interchangeable.

Specified by:

narrowContentsBy in class JavaType

widenContentsBy

public JavaType widenContentsBy(Class<?> contentClass)

Specified by:

widenContentsBy in class JavaType

isArrayType

public boolean isArrayType()

Overrides:

isArrayType in class JavaType

isAbstract

public boolean isAbstract()

For some odd reason, modifiers for array classes would claim they are abstract types. Not so, at least for our purposes.

Overrides:

isAbstract in class JavaType

isConcrete

public boolean isConcrete()

For some odd reason, modifiers for array classes would claim they are abstract types. Not so, at least for our purposes.

Overrides:

isConcrete in class JavaType

hasGenericTypes

public boolean hasGenericTypes()

Overrides:

hasGenericTypes in class JavaType

containedTypeName

public String containedTypeName(int index)

Not sure what symbolic name is used internally, if any; let's follow naming of Collection types here. Should not really matter since array types have no super types.

Overrides:

containedTypeName in class JavaType

getParameterSource

public Class<?> getParameterSource()

No parameterization for array types themselves; element type may obviously have parameterization.

Specified by:

getParameterSource in class JavaType

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.

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

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

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

toString

public String toString()

Specified by:

toString in class JavaType

equals

public boolean equals(Object o)

Specified by:

equals in class JavaType