Module java.base

Package java.lang.classfile.attribute^PREVIEW

Interface StackMapFrameInfo

public sealed interface StackMapFrameInfo

StackMapFrameInfo is a preview API of the Java platform.

Programs can only use StackMapFrameInfo when preview features are enabled.

Preview features may be removed in a future release, or upgraded to permanent features of the Java platform.

Models stack map frame of StackMapTable attribute 4.7.4.

Since:

22

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	StackMapFrameInfo.ObjectVerificationTypeInfoPREVIEW	Preview. A stack value for an object type.
static enum	StackMapFrameInfo.SimpleVerificationTypeInfoPREVIEW	Preview. A simple stack value.
static interface	StackMapFrameInfo.UninitializedVerificationTypeInfoPREVIEW	Preview. An uninitialized stack value.
static interface	StackMapFrameInfo.VerificationTypeInfoPREVIEW	Preview. The type of a stack value.

Method Summary

Modifier and Type	Method	Description
int	frameType()	Returns the frame compact form type.
List<StackMapFrameInfo.VerificationTypeInfoPREVIEW>	locals()	Returns the expanded local variable types.
static StackMapFrameInfoPREVIEW	of(LabelPREVIEW target, List<StackMapFrameInfo.VerificationTypeInfoPREVIEW> locals, List<StackMapFrameInfo.VerificationTypeInfoPREVIEW> stack)	Returns a new stack map frame.
List<StackMapFrameInfo.VerificationTypeInfoPREVIEW>	stack()	Returns the expanded stack types.
LabelPREVIEW	target()	Returns the frame target label.

Method Details

frameType

int frameType()

Returns the frame compact form type.

Returns:

the frame compact form type

target

LabelPREVIEW target()

Returns the frame target label.

Returns:

the frame target label

locals

List<StackMapFrameInfo.VerificationTypeInfoPREVIEW> locals()

Returns the expanded local variable types.

Returns:

the expanded local variable types

stack

List<StackMapFrameInfo.VerificationTypeInfoPREVIEW> stack()

Returns the expanded stack types.

Returns:

the expanded stack types

of

static StackMapFrameInfoPREVIEW of(LabelPREVIEW target,
 List<StackMapFrameInfo.VerificationTypeInfoPREVIEW> locals,
 List<StackMapFrameInfo.VerificationTypeInfoPREVIEW> stack)

Returns a new stack map frame.

Parameters:

target - the location of the frame

locals - the complete list of frame locals

stack - the complete frame stack

Returns:

a new stack map frame