org.osgl.util

Class Generics

java.lang.Object

org.osgl.util.Generics

public class Generics
extends Object

Provides utilities for generic relevant operations

Constructor Summary

Constructors

Constructor and Description
Generics()

Method Summary

Modifier and Type	Method and Description
static Map<String,Class>	buildTypeParamImplLookup(Class theClass) Build class type variable name and type variable implementation lookup
static void	buildTypeParamImplLookup(Class theClass, Map<String,Class> lookup)
static <T> Class<T>	classOf(Type type)
static void	main(String[] args)
static List<Type>	typeParamImplementations(Class theClass, Class rootClass) Returns implementation of type parameters declared in the root class/interface by the given sub class

Methods inherited from class java.lang.Object

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

Constructor Detail

Generics

public Generics()

Method Detail

classOf

public static <T> Class<T> classOf(Type type)

typeParamImplementations

public static List<Type> typeParamImplementations(Class theClass,
                                                  Class rootClass)

Returns implementation of type parameters declared in the root class/interface by the given sub class

For example, suppose a super class has generic type params: `MyBase<MODEL, QUERY>`, and a sub class is declared as `MyModel<MyModel, MyQuery>`, then passing `MyModel.class` to this method shall return a list of `{MyModel.class, MyQuery.class}`

If the specified class doesn't have generic type declared then it shall return an empty list

Parameters:

theClass - the end class

rootClass - the root class or interface

Returns:

a list of type variable implementation on root class

buildTypeParamImplLookup

public static Map<String,Class> buildTypeParamImplLookup(Class theClass)

Build class type variable name and type variable implementation lookup

Parameters:

theClass - the class to build the lookup

Returns:

the lookup

buildTypeParamImplLookup

public static void buildTypeParamImplLookup(Class theClass,
                                            Map<String,Class> lookup)

main

public static void main(String[] args)