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jdk.dynalink.beans

public final Class StaticClass

extends Object
implements Serializable
Class Inheritance
All Implemented Interfaces
java.io.Serializable
Imports
java.io.Serializable, java.util.Objects, jdk.dynalink.StandardOperation

Object that allows access to the static members of a class (its static methods, properties, and fields), as well as construction of instances using StandardOperation#NEW operation. In Dynalink, Class objects are not treated specially and act as ordinary Java objects; you can use e.g. GET:PROPERTY:superclass as a property getter to invoke clazz.getSuperclass(). On the other hand, you can not use Class objects to access static members of a class, nor to create new instances of the class using NEW. This is consistent with how Class objects behave in Java: in Java, you write e.g. new BitSet() instead of new BitSet.class(). Similarly, you write System.out and not System.class.out. It is this aspect of using a class name as the constructor and a namespace for static members that StaticClass embodies.

Objects of this class are recognized by the BeansLinker as being special, and operations on them will be linked against the represented class' static members. The "class" synthetic property is additionally recognized and returns the Java Class object, just as in Java System.class evaluates to the Class object for the System class. Conversely, Class objects exposed through BeansLinker expose the "static" synthetic property which returns their StaticClass object (there is no equivalent to this in Java).

In summary, instances of this class act as namespaces for static members and as constructors for classes, much the same way as specifying a class name in Java language does, except that in Java this is just a syntactic element, while in Dynalink they are expressed as actual objects.

StaticClass objects representing Java array types will act as constructors taking a single int argument and create an array of the specified size.

If the class has several constructors, StandardOperation#NEW on StaticClass will try to select the most specific applicable constructor. You might want to expose a mechanism in your language for selecting a constructor with an explicit signature through BeansLinker#getConstructorMethod(Class, String).

Since
9

Field Summary

Modifier and TypeField and Description
private final Class<?>
private static final long
private static final ClassValue<StaticClass>

Constructor Summary

AccessConstructor and Description
pack-priv
StaticClass(final Class<?> clazz)

Method Summary

Modifier and TypeMethod and Description
public static StaticClass

Returns:

the StaticClass instance representing the specified class.
forClass
(final Class<?>
the class for which the static facet is requested.
clazz
)

Retrieves the StaticClass instance for the specified class.

public Class<?>

Returns:

the represented Java class.
getRepresentedClass
()

Returns the represented Java class.

private Object

Returns:

forClass(Class) for the underlying clazz field.
readResolve
()

Returns forClass(Class) for the underlying clazz field ensuring that deserialization doesn't create non-canonical instances.

public String
toString()

Overrides java.lang.Object.toString.

Returns a string representation of the object.

Inherited from java.lang.Object:
cloneequalsfinalizegetClasshashCodenotifynotifyAllwaitwaitwait

Field Detail

clazzback to summary
private final Class<?> clazz
serialVersionUIDback to summary
private static final long serialVersionUID
staticClassesback to summary
private static final ClassValue<StaticClass> staticClasses

Constructor Detail

StaticClassback to summary
pack-priv StaticClass(final Class<?> clazz)

Method Detail

forClassback to summary
public static StaticClass forClass(final Class<?> clazz)

Retrieves the StaticClass instance for the specified class.

Parameters
clazz:Class<?>

the class for which the static facet is requested.

Returns:StaticClass

the StaticClass instance representing the specified class.

getRepresentedClassback to summary
public Class<?> getRepresentedClass()

Returns the represented Java class.

Returns:Class<?>

the represented Java class.

readResolveback to summary
private Object readResolve()

Returns forClass(Class) for the underlying clazz field ensuring that deserialization doesn't create non-canonical instances.

Returns:Object

forClass(Class) for the underlying clazz field.

toStringback to summary
public String toString()

Overrides java.lang.Object.toString.

Doc from java.lang.Object.toString.

Returns a string representation of the object. Satisfying this method's contract implies a non-null result must be returned.

Annotations
@Override