Package com.aspectran.core.util

Class TypeUtils

java.lang.Object

com.aspectran.core.util.TypeUtils

public abstract class TypeUtils
extends java.lang.Object

Utility methods focusing on type inspection, particularly with regard to generics.

Constructor Summary

Constructors

Constructor	Description
TypeUtils()

Method Summary

Modifier and Type	Method	Description
static java.lang.Class<?>	getPrimitiveWrapper(java.lang.Class<?> primitiveType)	Gets the wrapper object class for the given primitive type class.
static boolean	isAssignable(java.lang.Class<?> lhsType, java.lang.Class<?> rhsType)	Check if the right-hand side type may be assigned to the left-hand side type, assuming setting by reflection.
static boolean	isAssignableValue(java.lang.Class<?> type, java.lang.Object value)	Determine if the given type is assignable from the given value, assuming setting by reflection.
static boolean	isPrimitiveArray(java.lang.Class<?> clazz)	Check if the given class represents an array of primitives, i.e.
static boolean	isPrimitiveWrapper(java.lang.Class<?> clazz)	Check if the given class represents a primitive wrapper, i.e.
static boolean	isPrimitiveWrapperArray(java.lang.Class<?> clazz)	Check if the given class represents an array of primitive wrappers, i.e.
static java.lang.Class<?>[]	wrappersToPrimitives(java.lang.Class<?>[] classes)	Converts the specified array of wrapper Class objects to an array of its corresponding primitive Class objects.
static java.lang.Class<?>	wrapperToPrimitive(java.lang.Class<?> cls)	Converts the specified wrapper class to its corresponding primitive class.

Methods inherited from class java.lang.Object

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

Constructor Detail

TypeUtils

public TypeUtils()

Method Detail

isPrimitiveWrapper

public static boolean isPrimitiveWrapper(java.lang.Class<?> clazz)

Check if the given class represents a primitive wrapper, i.e. Boolean, Byte, Character, Short, Integer, Long, Float, or Double.

Parameters:

clazz - the class to check

Returns:

whether the given class is a primitive wrapper class

isPrimitiveArray

public static boolean isPrimitiveArray(java.lang.Class<?> clazz)

Check if the given class represents an array of primitives, i.e. boolean, byte, char, short, int, long, float, or double.

Parameters:

clazz - the class to check

Returns:

whether the given class is a primitive array class

isPrimitiveWrapperArray

public static boolean isPrimitiveWrapperArray(java.lang.Class<?> clazz)

Check if the given class represents an array of primitive wrappers, i.e. Boolean, Byte, Character, Short, Integer, Long, Float, or Double.

Parameters:

clazz - the class to check

Returns:

whether the given class is a primitive wrapper array class

isAssignable

public static boolean isAssignable(java.lang.Class<?> lhsType,
                                   java.lang.Class<?> rhsType)

Check if the right-hand side type may be assigned to the left-hand side type, assuming setting by reflection. Considers primitive wrapper classes as assignable to the corresponding primitive types.

Parameters:

lhsType - the target type

rhsType - the value type that should be assigned to the target type

Returns:

if the target type is assignable from the value type

isAssignableValue

public static boolean isAssignableValue(java.lang.Class<?> type,
                                        java.lang.Object value)

Determine if the given type is assignable from the given value, assuming setting by reflection. Considers primitive wrapper classes as assignable to the corresponding primitive types.

Parameters:

type - the target type

value - the value that should be assigned to the type

Returns:

if the type is assignable from the value

getPrimitiveWrapper

public static java.lang.Class<?> getPrimitiveWrapper(java.lang.Class<?> primitiveType)

Gets the wrapper object class for the given primitive type class. For example, passing boolean.class returns Boolean.class

Parameters:

primitiveType - the primitive type class for which a match is to be found

Returns:

the wrapper type associated with the given primitive or null if no match is found

wrapperToPrimitive

public static java.lang.Class<?> wrapperToPrimitive(java.lang.Class<?> cls)

Converts the specified wrapper class to its corresponding primitive class.

This method is the counter part of primitiveToWrapper(). If the passed in class is a wrapper class for a primitive type, this primitive type will be returned (e.g. Integer.TYPE for Integer.class). For other classes, or if the parameter is null, the return value is null.

Parameters:

cls - the class to convert, may be null

Returns:

the corresponding primitive type if cls is a wrapper class, null otherwise

wrappersToPrimitives

public static java.lang.Class<?>[] wrappersToPrimitives(java.lang.Class<?>[] classes)

Converts the specified array of wrapper Class objects to an array of its corresponding primitive Class objects.

This method invokes wrapperToPrimitive() for each element of the passed in array.

Parameters:

classes - the class array to convert, may be null or empty

Returns:

an array which contains for each given class, the primitive class or null if the original class is not a wrapper class. null if null input. Empty array if an empty array passed in.

See Also:

wrapperToPrimitive(Class)