bpiwowar.argparser
Class GenericHelper

java.lang.Object
  bpiwowar.argparser.GenericHelper

public class GenericHelper
extends Object

Helper methods for generics

Author:

bpiwowar

Constructor Summary

GenericHelper()

Method Summary

static boolean	checkGenerics(Class<?> candidate, Type gtype, Class... classes) Check if the generic types of an implemented superclass/interface match
static Type[]	getActualTypeArguments(Class<?> candidate, Class<?> implemented) Reflection helper - give the generic parameters of a class.
static <T,U extends T> U[]	newArray(Class<T> theClass, int length)
static <T> ArrayList<T>	newArrayList()
static <T> ArrayList<T>	newArrayList(int length)
static <K,V> HashMap<K,V>	newHashMap()
static <T> HashSet<T>	newHashSet()
static <K,V> TreeMap<K,V>	newTreeMap()
static <T> TreeSet<T>	newTreeSet()

Methods inherited from class java.lang.Object

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

Constructor Detail

GenericHelper

public GenericHelper()

Method Detail

newArrayList

public static final <T> ArrayList<T> newArrayList()

newTreeMap

public static final <K,V> TreeMap<K,V> newTreeMap()

newHashMap

public static final <K,V> HashMap<K,V> newHashMap()

newHashSet

public static final <T> HashSet<T> newHashSet()

checkGenerics

public static boolean checkGenerics(Class<?> candidate,
                                    Type gtype,
                                    Class... classes)

Check if the generic types of an implemented superclass/interface match

 GenericHelper.checkGenerics(Collection.class, gtype, String.class);
 

Parameters:

candidate -

gtype -

classes -

Returns:

getActualTypeArguments

public static Type[] getActualTypeArguments(Class<?> candidate,
                                            Class<?> implemented)

Reflection helper - give the generic parameters of a class.

Parameters:

candidate - The class implementing the superclass or superinterface

implemented -

Returns:

a type array of the type arguments of a superclass or a superinterface

newTreeSet

public static <T> TreeSet<T> newTreeSet()

newArrayList

public static <T> ArrayList<T> newArrayList(int length)

newArray

public static final <T,U extends T> U[] newArray(Class<T> theClass,
                                                 int length)