public
abstract
class
Property
extends Object
| java.lang.Object | |
| ↳ | android.util.Property<T, V> |
 Known Direct Subclasses
FloatProperty<T>,
IntProperty<T>
|
A property is an abstraction that can be used to represent a set(Object, Object) or get(Object)
methods can be implemented in terms of the private fields of the host object, or via "setter" and
"getter" methods or by some other mechanism, as appropriate.
Public constructors | |
|---|---|
Property(Class<V> type, String name)
A constructor that takes an identifying name and |
|
Public methods | |
|---|---|
abstract
V
|
get(T object)
Returns the current value that this property represents on the given |
String
|
getName()
Returns the name for this property. |
Class<V>
|
getType()
Returns the type for this property. |
boolean
|
isReadOnly()
Returns true if the |
static
<T, V>
Property<T, V>
|
of(Class<T> hostType, Class<V> valueType, String name)
This factory method creates and returns a Property given the
If either of the get/is method alternatives is found on the class, but an appropriate
|
void
|
set(T object, V value)
Sets the value on |
Inherited methods | |
|---|---|
From
class
java.lang.Object
| |
Property (Class<V> type, String name)
A constructor that takes an identifying name and type for the property.
| Parameters | |
|---|---|
type |
Class
|
name |
String
|
V get (T object)
Returns the current value that this property represents on the given object.
| Parameters | |
|---|---|
object |
T
|
| Returns | |
|---|---|
V |
|
Class<V> getType ()
Returns the type for this property.
| Returns | |
|---|---|
Class<V> |
|
boolean isReadOnly ()
Returns true if the set(Object, Object) method does not set the value on the target
object (in which case the set() method should throw a NoSuchPropertyException exception). This may happen if the Property wraps functionality that
allows querying the underlying value but not setting it. For example, the of(Class, Class, String) factory method may return a Property with name "foo" for an object that has
only a getFoo() or isFoo() method, but no matching
setFoo() method.
| Returns | |
|---|---|
boolean |
|
Property<T, V> of (Class<T> hostType, Class<V> valueType, String name)
This factory method creates and returns a Property given the class and
name parameters, where the "name" parameter represents either:
Developers
getName() method on the class which takes no arguments, plus an
optional public setName() method which takes a value of the same type
returned by getName()
isName() method on the class which takes no arguments, plus an
optional public setName() method which takes a value of the same type
returned by isName()
name field on the class
If either of the get/is method alternatives is found on the class, but an appropriate
setName() method is not found, the Property will be
readOnly. Calling the set(Object, Object) method on such
a property is allowed, but will have no effect.
If neither the methods nor the field are found on the class a
NoSuchPropertyException exception will be thrown.
| Parameters | |
|---|---|
hostType |
Class
|
valueType |
Class
|
name |
String
|
| Returns | |
|---|---|
Property<T, V> |
|
void set (T object,
V value)
Sets the value on object which this property represents. If the method is unable
to set the value on the target object it will throw an UnsupportedOperationException
exception.
| Parameters | |
|---|---|
object |
T
|
value |
V
|