Enum 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 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.

REMOVE

Removes the value from a namespace defined on an object.

SET

Set the value in a namespace defined on an object.

Methods

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 declared in class java.lang.Enum

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

Methods declared in class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods declared in interface jdk.dynalink.Operation

named, withNamespace, withNamespaces

Enum Constants

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.

REMOVE

public static final StandardOperation REMOVE

Removes the value from a namespace defined on an object. Call sites with this operation should have a signature of (receiver, name)→void or (receiver)→void when used with NamedOperation, with all parameters 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.

Methods

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

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/11/docs/api/jdk.dynalink/jdk/dynalink/StandardOperation.html