jdk.internal.jvmci.meta

Interface MetaAccessProvider

All Known Implementing Classes:

HotSpotMetaAccessProvider

public interface MetaAccessProvider

Provides access to the metadata of a class typically provided in a class file.

Method Summary

Modifier and Type	Method and Description
int	decodeDebugId(JavaConstant constant)
DeoptimizationAction	decodeDeoptAction(JavaConstant constant)
DeoptimizationReason	decodeDeoptReason(JavaConstant constant)
JavaConstant	encodeDeoptActionAndReason(DeoptimizationAction action, DeoptimizationReason reason, int debugId) Encodes a deoptimization action and a deoptimization reason in an integer value.
long	getMemorySize(JavaConstant constant) Returns the number of bytes occupied by this constant value or constant object.
ResolvedJavaField	lookupJavaField(Field reflectionField) Provides the ResolvedJavaField for a Field obtained via reflection.
ResolvedJavaMethod	lookupJavaMethod(Executable reflectionMethod) Provides the ResolvedJavaMethod for a Method or Constructor obtained via reflection.
ResolvedJavaType	lookupJavaType(Class<?> clazz) Returns the resolved Java type representing a given Java class.
ResolvedJavaType	lookupJavaType(JavaConstant constant) Returns the resolved Java type of the given JavaConstant object.
default ResolvedJavaType[]	lookupJavaTypes(Class<?>[] classes) Returns the resolved Java types representing some given Java classes.
Signature	parseMethodDescriptor(String methodDescriptor) Parses a method descriptor into a Signature.

Method Detail

lookupJavaType

ResolvedJavaType lookupJavaType(Class<?> clazz)

Returns the resolved Java type representing a given Java class.

Parameters:

clazz - the Java class object

Returns:

the resolved Java type object

lookupJavaTypes

default ResolvedJavaType[] lookupJavaTypes(Class<?>[] classes)

Returns the resolved Java types representing some given Java classes.

Parameters:

classes - the Java class objects

Returns:

the resolved Java type objects

lookupJavaMethod

ResolvedJavaMethod lookupJavaMethod(Executable reflectionMethod)

Provides the ResolvedJavaMethod for a Method or Constructor obtained via reflection.

lookupJavaField

ResolvedJavaField lookupJavaField(Field reflectionField)

Provides the ResolvedJavaField for a Field obtained via reflection.

lookupJavaType

ResolvedJavaType lookupJavaType(JavaConstant constant)

Returns the resolved Java type of the given JavaConstant object.

Returns:

null if constant.isNull() || !constant.kind.isObject()

getMemorySize

long getMemorySize(JavaConstant constant)

Returns the number of bytes occupied by this constant value or constant object.

Parameters:

constant - the constant whose bytes should be measured

Returns:

the number of bytes occupied by this constant

parseMethodDescriptor

Signature parseMethodDescriptor(String methodDescriptor)

Parses a method descriptor into a Signature. The behavior of this method is undefined if the method descriptor is not well formed.

encodeDeoptActionAndReason

JavaConstant encodeDeoptActionAndReason(DeoptimizationAction action,
                                        DeoptimizationReason reason,
                                        int debugId)

Encodes a deoptimization action and a deoptimization reason in an integer value.

Parameters:

debugId - an integer that can be used to track the origin of a deoptimization at runtime. There is no guarantee that the runtime will use this value. The runtime may even keep fewer than 32 bits.

Returns:

the encoded value as an integer

decodeDeoptReason

DeoptimizationReason decodeDeoptReason(JavaConstant constant)

decodeDeoptAction

DeoptimizationAction decodeDeoptAction(JavaConstant constant)

decodeDebugId

int decodeDebugId(JavaConstant constant)