ObjectMethods
open class ObjectMethods
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
Public methods
bootstrap
open static fun bootstrap(
lookup: MethodHandles.Lookup,
methodName: String,
type: TypeDescriptor,
recordClass: Class<*>,
names: String?,
vararg getters: MethodHandle!
): Any
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 java.lang.Record#equals(Object), java.lang.Record#hashCode() and java.lang.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 |
| Return |
Any |
a call site if invoked by indy, or a method handle if invoked by a condy |
| Exceptions |
java.lang.IllegalArgumentException |
if the bootstrap arguments are invalid or inconsistent |
java.lang.Throwable |
if any exception is thrown during call site construction |
