Static Public Member Functions
static boolean	equal (Object a, Object b)
static int	hashCode (Object...objs)
static int	hashCodeIter (Iterator<?> objs)
static final< T > T	cast (Class< T > cla, Object value)
static final< T > T	cast (Class< T > cla, Object value, T def)
static< T > T	castUnsafe (Class<?> cla, Object value, T def)
Private Member Functions
	Objects ()

Detailed Description

Collection of methods often used with any object.

It includes functions to:

cast classes
compute the hashcode for several objects

Partially copied from another project.

Author:: Krzysztof Magusiak

Constructor & Destructor Documentation

metadone.util.Objects.Objects ( ) [private]

Member Function Documentation

static final<T> T metadone.util.Objects.cast	(	Class< T >	cla,
		Object	value
	)		`[static]`

Casts a value to the given type and returns null instead of throwing an exception.

Parameters:

<T>	The expected type
cla	The class
value	The value to cast

Returns:: A value of the expected type or null

Exceptions:

NullPointerException when cla is null

References metadone.util.Objects.castUnsafe().

static final<T> T metadone.util.Objects.cast	(	Class< T >	cla,
		Object	value,
		T	def
	)		`[static]`

Casts a value to the given type and returns a default value instead of throwing an exception.

Parameters:

<T>	The expected type
cla	The class
value	The value to cast
def	The default value

Returns:: A value of the expected type

Exceptions:

NullPointerException when cla is null

References metadone.util.Objects.castUnsafe().

static <T> T metadone.util.Objects.castUnsafe	(	Class<?>	cla,
		Object	value,
		T	def
	)		`[static]`

Casts a value to the given type and returns a default value instead of throwing an exception.

Parameters:

<T>	The expected type
cla	The class
value	The value to cast
def	The default value

Returns:: A value of the expected type

Exceptions:

NullPointerException when cla is null

Referenced by metadone.util.Objects.cast().

static boolean metadone.util.Objects.equal	(	Object	a,
		Object	b
	)		`[static]`

Tests if two objects are equal (null is permitted).

Parameters:

a	The first object or `null`
b	The second object or `null`

Returns:: True only if both objects are equal

See also:: Object.equals(Object)

static int metadone.util.Objects.hashCode ( Object... objs ) [static]

Produces a hash code for a sequence of objects.

The hash code is independent from the order of the elements.

 hxor = XOR { i.hashCode() | i in objs }
 hplus = SUM { i.hashCode() | i in objs }
 result = hxor xor Integer.rotateLeft(hplus, 0x10)

Parameters:

objs	The objects

Returns:: A hash value for these objects

See also:: #hashCodeIter(Iterator)

static int metadone.util.Objects.hashCodeIter ( Iterator<?> objs ) [static]

Produces a hash code for a sequence of objects.

Parameters:

objs	The object sequence

Returns:: A hash value for these objects

Exceptions:

NullPointerException when objs is null

See also:: hashCode(Object...)

Referenced by metadone.util.ImmutableList< E >.hashCode(), and metadone.client.grasyla2.base.GrasylaComponent< C >.hashCode().

The documentation for this class was generated from the following file:

metadone_common/src/metadone/util/Objects.java

Static Public Member Functions

Private Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation