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 NamespaceOperation
s 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