jp.develop.common.util
Class TypeUtil

java.lang.Object
  jp.develop.common.util.TypeUtil

public final class TypeUtil
extends Object

Utilities for Type information. This class is aimed to support generics operation.

Author:

Waki Takeya

Method Summary

static <T extends Collection<?>> ParameterizedType	getCollectionType(Class<T> collection, Type elementType) Get the type having collection's actual class and element's actual class.
static GenericArrayType	getGenericArrayType(Type genericComponentType) General purpose method to get GenericArrayType.
static <T extends Map<?,?>> ParameterizedType	getMapType(Class<T> map, Type keyType, Type valueType) Get the type having map's actual class and key and value's actual class.
static ParameterizedType	getParameterizedType(Class<?> rawType, Type... actualTypeArguments) General purpose method to get ParameterizedType.

Methods inherited from class java.lang.Object

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

Method Detail

getCollectionType

public static <T extends Collection<?>> ParameterizedType getCollectionType(Class<T> collection,
                                                                            Type elementType)

Get the type having collection's actual class and element's actual class. Basically, it is same as the method getParameterizedType(). But I believe this is helpful to understand the purpose.

Type Parameters:

T - Class implements Collection.

Parameters:

collection - Class of Collection.

elementType - Class of Elements.

Returns:

Parameterized Type for specified collection and element class.

getMapType

public static <T extends Map<?,?>> ParameterizedType getMapType(Class<T> map,
                                                                Type keyType,
                                                                Type valueType)

Get the type having map's actual class and key and value's actual class. Basically, it is same as the method getParameterizedType(). But I believe this is helpful to understand the purpose.

Type Parameters:

T - Class implements Map.

Parameters:

map - Class of Map.

keyType - Class of Key.

valueType - Class of Value.

Returns:

Parameterized Type for specified map and key and value class.

getParameterizedType

public static ParameterizedType getParameterizedType(Class<?> rawType,
                                                     Type... actualTypeArguments)

General purpose method to get ParameterizedType.

Parameters:

rawType - Raw type of parameterizedType.

actualTypeArguments - Actual type arguments of parameterizedType.

Returns:

Parameterized type.

getGenericArrayType

public static GenericArrayType getGenericArrayType(Type genericComponentType)

General purpose method to get GenericArrayType.

Parameters:

genericComponentType - Type of array elements.

Returns:

Generic Array Type