Package com.alibaba.fastjson

Class TypeReference<T>

java.lang.Object

com.alibaba.fastjson.TypeReference<T>

public class TypeReference<T>
extends Object

Represents a generic type T. Java doesn't yet provide a way to represent generic types, so this class does. Forces clients to create a subclass of this class which enables retrieval the type information even at runtime.

For example, to create a type literal for List<String>, you can create an empty anonymous inner class:

 TypeReference<List<String>> list = new TypeReference<List<String>>() {};
 

This syntax cannot be used to create type literals that have wildcard parameters, such as Class<?> or List<? extends CharSequence>.

Field Summary

Fields

Modifier and Type	Field	Description
protected final Type	type

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	TypeReference()	Constructs a new type literal.
protected	TypeReference(Type... actualTypeArguments)

Method Summary

Modifier and Type	Method	Description
Type	getType()	Gets underlying Type instance.
static Type	intern(ParameterizedTypeImpl type)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

type

protected final Type type

Constructor Details

TypeReference

protected TypeReference()

Constructs a new type literal. Derives represented class from type parameter.

Clients create an empty anonymous subclass. Doing so embeds the type parameter in the anonymous class's type hierarchy so we can reconstitute it at runtime despite erasure.

TypeReference

protected TypeReference(Type... actualTypeArguments)

Since:

1.2.9

Method Details

getType

public Type getType()

Gets underlying Type instance.

intern

public static Type intern(ParameterizedTypeImpl type)