jdk.internal.jvmci.meta

Interface Signature

All Known Implementing Classes:

HotSpotSignature

public interface Signature

Represents a method signature provided by the runtime.

See Also:

Method Descriptors

Method Summary

Modifier and Type	Method and Description
int	getParameterCount(boolean receiver) Returns the number of parameters in this signature, adding 1 for a receiver if requested.
default Kind	getParameterKind(int index) Gets the parameter kind at the specified position.
JavaType	getParameterType(int index, ResolvedJavaType accessingClass) Gets the parameter type at the specified position.
default Kind	getReturnKind() Gets the return kind of this signature.
JavaType	getReturnType(ResolvedJavaType accessingClass) Gets the return type of this signature.
default String	toMethodDescriptor() Gets the method descriptor corresponding to this signature.
default Kind[]	toParameterKinds(boolean receiver)
default JavaType[]	toParameterTypes(JavaType receiverType)

Method Detail

getParameterCount

int getParameterCount(boolean receiver)

Returns the number of parameters in this signature, adding 1 for a receiver if requested.

Parameters:

receiver - true if 1 is to be added to the result for a receiver

Returns:

the number of parameters; + 1 iff receiver == true

getParameterType

JavaType getParameterType(int index,
                          ResolvedJavaType accessingClass)

Gets the parameter type at the specified position.

Parameters:

index - the index into the parameters, with 0 indicating the first parameter

accessingClass - the context of the type lookup. If non-null, its class loader is used for resolving the type. If null, then the type returned is either unresolved or a resolved type whose resolution is context free (e.g., a primitive type or a type in a java.* package).

Returns:

the index'th parameter type

Throws:

LinkageError - if accessingClass != null and resolution fails

getParameterKind

default Kind getParameterKind(int index)

Gets the parameter kind at the specified position. This is the same as calling getParameterType(int, jdk.internal.jvmci.meta.ResolvedJavaType). getKind.

Parameters:

index - the index into the parameters, with 0 indicating the first parameter

Returns:

the kind of the parameter at the specified position

getReturnType

JavaType getReturnType(ResolvedJavaType accessingClass)

Gets the return type of this signature.

Parameters:

accessingClass - the context of the type lookup. If non-null, its class loader is used for resolving the type. If null, then the type returned is either unresolved or a resolved type whose resolution is context free (e.g., a primitive type or a type in a java.* package).

Returns:

the return type

Throws:

LinkageError - if accessingClass != null and resolution fails

getReturnKind

default Kind getReturnKind()

Gets the return kind of this signature. This is the same as calling getReturnType(jdk.internal.jvmci.meta.ResolvedJavaType). getKind.

toMethodDescriptor

default String toMethodDescriptor()

Gets the method descriptor corresponding to this signature. For example:

 (ILjava/lang/String;D)V
 

Returns:

the signature as a string

toParameterTypes

default JavaType[] toParameterTypes(JavaType receiverType)

toParameterKinds

default Kind[] toParameterKinds(boolean receiver)