com.googlecode.jtype
Class Generic<T>

java.lang.Object
  com.googlecode.jtype.Generic<T>

Type Parameters:

T - the type that this generic type literal represents

public abstract class Generic<T>
extends java.lang.Object

Provides a generic type literal.

This class captures the actual type argument used when subclassed. This allows it to be referenced as a type parameter at compile time and also makes it available at run time. It is intended to be used as follows:

Generic<List<String>> listStringType = new Generic<List<String>>() {};

This allows generic type literals to be used in a simple manner as standard class literals. For example, consider the following generic method signature:

<T> void add(T element, Class<T> type)

A problem arises when <T> is a generic type, such as List<String>, since List<String>.class produces a compile time error. Use of this class can mitigate this problem:

<T> void add(T element, Generic<T> type)

Which can then be invoked as follows:

add(new ArrayList<String>(), new Generic<List<String>>() {});

Version:

$Id: Generic.java 47 2009-10-02 15:59:23Z markhobson $

Author:

Mark Hobson

See Also:

Generics, Neal Gafter's blog: Super Type Tokens

Constructor Summary

protected

Generic()

Method Summary

boolean	equals(java.lang.Object object)
static <T> Generic<T>	get(java.lang.Class<T> klass)
static <T> Generic<? extends T>	get(java.lang.Class<T> rawType, java.lang.reflect.Type... actualTypeArguments)
static Generic<?>	get(java.lang.reflect.Type type)
java.lang.Class<? super T>	getRawType()
java.lang.reflect.Type	getType()
int	hashCode()
java.lang.String	toString()
java.lang.String	toUnqualifiedString()
static Generic<?>	valueOf(java.lang.String typeName)

Methods inherited from class java.lang.Object

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

Constructor Detail

Generic

protected Generic()

Method Detail

getType

public java.lang.reflect.Type getType()

getRawType

public java.lang.Class<? super T> getRawType()

toUnqualifiedString

public java.lang.String toUnqualifiedString()

get

public static <T> Generic<T> get(java.lang.Class<T> klass)

get

public static Generic<?> get(java.lang.reflect.Type type)

get

public static <T> Generic<? extends T> get(java.lang.Class<T> rawType,
                                           java.lang.reflect.Type... actualTypeArguments)

valueOf

public static Generic<?> valueOf(java.lang.String typeName)

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object object)

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object