Module jdk.dynalink

Package jdk.dynalink

Enum StandardOperation

java.lang.Object

java.lang.Enum<StandardOperation>

jdk.dynalink.StandardOperation

All Implemented Interfaces:

Serializable, Comparable<StandardOperation>, Operation

public enum StandardOperation
extends Enum<StandardOperation>
implements Operation

Defines the standard dynamic operations. The operations GET and SET must be used as part of a NamespaceOperation. NamedOperation can then be further used on these NamespaceOperations to bind the name parameter of GET and SET operations, in which case it disappears from their type signature. NamedOperation can also be used to decorate CALL and NEW operations with a diagnostic name, and as such it does not affect their type signature.

Enum Constant Summary

Enum Constants

Enum Constant	Description
CALL	Call a callable object.
GET	Get the value from a namespace defined on an object.
NEW	Call a constructor object.
SET	Set the value in a namespace defined on an object.

Method Summary

Modifier and Type	Method	Description
static StandardOperation	valueOf(String name)	Returns the enum constant of this type with the specified name.
static StandardOperation[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface jdk.dynalink.Operation

named, withNamespace, withNamespaces

Enum Constant Detail

GET

public static final StandardOperation GET

Get the value from a namespace defined on an object. Call sites with this operation should have a signature of (receiver, name)→value or (receiver)→value when used with NamedOperation, with all parameters and return type being of any type (either primitive or reference). This operation must always be used as part of a NamespaceOperation.

SET

public static final StandardOperation SET

Set the value in a namespace defined on an object. Call sites with this operation should have a signature of (receiver, name, value)→void or (receiver, value)→void when used with NamedOperation, with all parameters and return type being of any type (either primitive or reference). This operation must always be used as part of a NamespaceOperation.

CALL

public static final StandardOperation CALL

Call a callable object. Call sites with this operation should have a signature of (callable, receiver, arguments...)→value, with all parameters and return type being of any type (either primitive or reference). Typically, the callables are presumed to be methods of an object, so an explicit receiver value is always passed to the callable before the arguments. If a callable has no concept of a receiver, it is free to ignore the value of the receiver argument. The CALL operation is allowed to be used with a NamedOperation even though it does not take a name. Using it with a named operation won't affect its signature; the name is solely meant to be used as a diagnostic description for error messages.

NEW

public static final StandardOperation NEW

Call a constructor object. Call sites with this operation should have a signature of (constructor, arguments...)→value, with all parameters and return type being of any type (either primitive or reference). The NEW operation is allowed to be used with a NamedOperation even though it does not take a name. Using it with a named operation won't affect its signature; the name is solely meant to be used as a diagnostic description for error messages.

Method Detail

values

public static StandardOperation[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (StandardOperation c : StandardOperation.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static StandardOperation valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null