org.eclipse.ocl.examples.common.utils

Class ClassUtils

java.lang.Object

org.eclipse.ocl.examples.common.utils.ClassUtils

public class ClassUtils
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
ClassUtils()

Method Summary

Methods

Modifier and Type	Method and Description
static <T> T	asClassOrNull(java.lang.Object object, java.lang.Class<T> requiredClass) Return object cast to requiredClass.
static <T> T	asClassUnchecked(java.lang.Object object) Return object cast to T without a check.
static <T> T	asClassUnchecked(java.lang.Object object, T requiredClassObject) Return object cast to T without a check.
static boolean	equals(java.lang.Object left, java.lang.Object right) Return true if left and right are equal, avoiding an NPE by first using left==right before attempting left.equals(right).
static <T> java.lang.Class<T>	getClass(T object) Return the fully typed class of an object.
static <T> T	isInstanceOf(java.lang.Object anObject, java.lang.Class<T> aClass) Return anObject cast to aClass if type-safe or null otherwise.

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassUtils

public ClassUtils()

Method Detail

asClassOrNull

public static <T> T asClassOrNull(java.lang.Object object,
                  java.lang.Class<T> requiredClass)

Return object cast to requiredClass.

Parameters:

object - to cast.

requiredClass - to cast to.

Returns:

cast object or null

asClassUnchecked

public static <T> T asClassUnchecked(java.lang.Object object,
                     T requiredClassObject)

Return object cast to T without a check.

This enables type-checking to be suppressed on a single expression term avoiding the need for suppressing unchecked warnings throughout the rest of an invoking method.

Use as: asClassUnchecked(object, (ArbitrarilyComplicatedType)null)

Type Parameters:

T - required type

Parameters:

object - to cast

requiredClassObject - dummy argument: use null

Returns:

cast type

asClassUnchecked

public static <T> T asClassUnchecked(java.lang.Object object)

Return object cast to T without a check.

This enables type-checking to suppressed on a single expression term avoiding the need for suppressing unchecked warnings throughout the rest of an invoking method.

Use as: ArbitrarilyComplicatedType castObject = asClassUnchecked(object);

Type Parameters:

T - required type

Parameters:

object - to cast

Returns:

cast type

equals

public static boolean equals(java.lang.Object left,
             java.lang.Object right)

Return true if left and right are equal, avoiding an NPE by first using left==right before attempting left.equals(right).

Parameters:

left -

right -

Returns:

true if equals

getClass

public static <T> java.lang.Class<T> getClass(T object)

Return the fully typed class of an object.

Type Parameters:

T - type

Parameters:

object - the object

Returns:

the class

isInstanceOf

public static <T> T isInstanceOf(java.lang.Object anObject,
                 java.lang.Class<T> aClass)

Return anObject cast to aClass if type-safe or null otherwise.

Parameters:

anObject - for which cast required

aClass - the type to which cast required

Returns:

the non-null cast of anObject if safe