ObjectMethods
public
class
ObjectMethods
extends Object
Bootstrap methods for state-driven implementations of core methods,
including Object#equals(Object), Object#hashCode(), and
Object#toString(). These methods may be used, for example, by
Java compiler implementations to implement the bodies of Object
methods for record classes.
Summary
Inherited methods |
|---|
From class
java.lang.Object
Object
|
clone()
Creates and returns a copy of this object.
|
boolean
|
equals(Object obj)
Indicates whether some other object is "equal to" this one.
|
void
|
finalize()
Called by the garbage collector on an object when garbage collection
determines that there are no more references to the object.
|
final
Class<?>
|
getClass()
Returns the runtime class of this Object.
|
int
|
hashCode()
Returns a hash code value for the object.
|
final
void
|
notify()
Wakes up a single thread that is waiting on this object's
monitor.
|
final
void
|
notifyAll()
Wakes up all threads that are waiting on this object's monitor.
|
String
|
toString()
Returns a string representation of the object.
|
final
void
|
wait(long timeoutMillis, int nanos)
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted, or until a
certain amount of real time has elapsed.
|
final
void
|
wait(long timeoutMillis)
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted, or until a
certain amount of real time has elapsed.
|
final
void
|
wait()
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted.
|
|
Public methods
bootstrap
public static Object bootstrap (MethodHandles.Lookup lookup,
String methodName,
TypeDescriptor type,
Class<?> recordClass,
String names,
MethodHandle... getters)
Bootstrap method to generate the Object#equals(Object),
Object#hashCode(), and Object#toString() methods, based
on a description of the component names and accessor methods, for either
invokedynamic call sites or dynamic constant pool entries.
For more detail on the semantics of the generated methods see the specification
of Record.equals(Object), Record.hashCode() and
Record.toString().
| Parameters |
|---|
lookup |
MethodHandles.Lookup: Every bootstrap method is expected to have a lookup
which usually represents a lookup context with the
accessibility privileges of the caller. This is because
invokedynamic call sites always provide a lookup
to the corresponding bootstrap method, but this method just
ignores the lookup parameter |
methodName |
String: the name of the method to generate, which must be one of
"equals", "hashCode", or "toString" |
type |
TypeDescriptor: a MethodType corresponding the descriptor type
for the method, which must correspond to the descriptor
for the corresponding Object method, if linking
an invokedynamic call site, or the
constant MethodHandle.class, if linking a
dynamic constant |
recordClass |
Class: the record class hosting the record components |
names |
String: the list of component names, joined into a string
separated by ";", or the empty string if there are no
components. Maybe be null, if the methodName
is "equals" or "hashCode". |
getters |
MethodHandle: method handles for the accessor methods for the components |
| Returns |
|---|
Object |
a call site if invoked by indy, or a method handle
if invoked by a condy |
