org.zkoss.lang

Class Generics

java.lang.Object

org.zkoss.lang.Generics

public class Generics
extends Object

Utilities to handle generic types, such as converting a non-type object to a generic type without warning.

Since:

6.0.0

Author:

tomyeh

Constructor Summary

Constructors

Constructor and Description
Generics()

Method Summary

Modifier and Type	Method and Description
static <T> Class<T>	cast(Class cls) Returns a type-safe generic class of the given type-less class.
static <T> Collection<T>	cast(Collection col) Returns a type-safe generic collection of the given un-typed collection.
static <T> Enumeration<T>	cast(Enumeration en) Returns a type-safe generic enumeration of the given un-typed enumeration.
static <T> Iterator<T>	cast(Iterator it) Returns a type-safe generic iterator of the given un-typed iterator.
static <T> List<T>	cast(List list) Returns a type-safe generic list of the given un-typed list.
static <T> ListIterator<T>	cast(ListIterator it) Returns a type-safe generic list iterator of the given un-typed list iterator.
static <K,V> Map<K,V>	cast(Map map) Returns a type-safe generic map of the given un-typed map.
static <T> T	cast(Object o) Force to cast an object to the given type.
static <T> Set<T>	cast(Set set) Returns a type-safe generic set of the given un-typed set.
static <T> ThreadLocal<T>	cast(ThreadLocal tl) Returns a type-safe generic thread-local of the given un-typed thread-local.

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

cast

public static final <T> Class<T> cast(Class cls)

Returns a type-safe generic class of the given type-less class.

cast

public static final <T> T cast(Object o)

Force to cast an object to the given type. Notice that it is not safe to use, unless you are sure that o is an instance of T.

cast

public static final <T> Iterator<T> cast(Iterator it)

Returns a type-safe generic iterator of the given un-typed iterator.

cast

public static final <T> ListIterator<T> cast(ListIterator it)

Returns a type-safe generic list iterator of the given un-typed list iterator.

cast

public static final <T> Enumeration<T> cast(Enumeration en)

Returns a type-safe generic enumeration of the given un-typed enumeration.

cast

public static final <T> Collection<T> cast(Collection col)

Returns a type-safe generic collection of the given un-typed collection.

cast

public static final <T> List<T> cast(List list)

Returns a type-safe generic list of the given un-typed list.

cast

public static final <T> Set<T> cast(Set set)

Returns a type-safe generic set of the given un-typed set.

cast

public static final <K,V> Map<K,V> cast(Map map)

Returns a type-safe generic map of the given un-typed map.

cast

public static final <T> ThreadLocal<T> cast(ThreadLocal tl)

Returns a type-safe generic thread-local of the given un-typed thread-local.