Package org.apache.bval.util

Class ObjectUtils

java.lang.Object

org.apache.bval.util.ObjectUtils

public final class ObjectUtils
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static Annotation[]	EMPTY_ANNOTATION_ARRAY
static Class<?>[]	EMPTY_CLASS_ARRAY
static String[]	EMPTY_STRING_ARRAY

Method Summary

Modifier and Type	Method	Description
static <T> T[]	arrayAdd(T[] array, T objectToAdd)
static boolean	arrayContains(Object[] array, Object objectToFind)	Checks if the object is in the given array.
static <T> T	defaultIfNull(T object, T defaultValue)	Returns a default value if the object passed is null.
static int	hashCode(Object o)	Get hashcode of o, taking into account array values.
static int	indexOf(Object[] array, Object objectToFind)
static boolean	isEmptyArray(Object array)

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_CLASS_ARRAY

public static final Class<?>[] EMPTY_CLASS_ARRAY

EMPTY_STRING_ARRAY

public static final String[] EMPTY_STRING_ARRAY

EMPTY_ANNOTATION_ARRAY

public static final Annotation[] EMPTY_ANNOTATION_ARRAY

Method Detail

defaultIfNull

public static <T> T defaultIfNull(T object,
                                  T defaultValue)

Returns a default value if the object passed is null.

 ObjectUtils.defaultIfNull(null, null)      = null
 ObjectUtils.defaultIfNull(null, "")        = ""
 ObjectUtils.defaultIfNull(null, "zz")      = "zz"
 ObjectUtils.defaultIfNull("abc", *)        = "abc"
 ObjectUtils.defaultIfNull(Boolean.TRUE, *) = Boolean.TRUE
 

Type Parameters:

T - the type of the object

Parameters:

object - the Object to test, may be null

defaultValue - the default value to return, may be null

Returns:

object if it is not null, defaultValue otherwise

isEmptyArray

public static boolean isEmptyArray(Object array)

arrayContains

public static boolean arrayContains(Object[] array,
                                    Object objectToFind)

Checks if the object is in the given array.

The method returns false if a null array is passed in.

Parameters:

array - the array to search through

objectToFind - the object to find

Returns:

true if the array contains the object

indexOf

public static int indexOf(Object[] array,
                          Object objectToFind)

arrayAdd

public static <T> T[] arrayAdd(T[] array,
                               T objectToAdd)

hashCode

public static int hashCode(Object o)

Get hashcode of o, taking into account array values.

Parameters:

o -

Returns:

int

See Also:

Arrays, Objects.hashCode(Object)