Interface MethodHandleEntry

All Superinterfaces:

LoadableConstantEntry, PoolEntry

public sealed interface MethodHandleEntry
extends LoadableConstantEntry

Models a CONSTANT_MethodHandle_info structure, or a symbolic reference to a method handle, in the constant pool of a class file. The method handle directly accesses an accessible method, field, or constructor.

The use of a MethodHandleEntry is modeled by a DirectMethodHandleDesc. Conversions are through ConstantPoolBuilder.methodHandleEntry(DirectMethodHandleDesc) and asSymbol().

A method handle entry is composite:

MethodHandleEntry(
    int refKind,
    MemberRefEntry reference
)

where refKind is in the range [1, 9].

See Java Virtual Machine Specification:

4.4.8 The CONSTANT_MethodHandle_info Structure

Since:

24

See Also:

• ConstantPoolBuilder::methodHandleEntry

Field Summary

Fields declared in interface PoolEntry

TAG_CLASS, TAG_DOUBLE, TAG_DYNAMIC, TAG_FIELDREF, TAG_FLOAT, TAG_INTEGER, TAG_INTERFACE_METHODREF, TAG_INVOKE_DYNAMIC, TAG_LONG, TAG_METHOD_HANDLE, TAG_METHOD_TYPE, TAG_METHODREF, TAG_MODULE, TAG_NAME_AND_TYPE, TAG_PACKAGE, TAG_STRING, TAG_UTF8

Modifier and Type	Field	Description
static final int	TAG_CLASS	The tag for CONSTANT_Class constant kind.
static final int	TAG_DOUBLE	The tag for CONSTANT_Double constant kind.
static final int	TAG_DYNAMIC	The tag for CONSTANT_Dynamic constant kind.
static final int	TAG_FIELDREF	The tag for CONSTANT_Fieldref constant kind.
static final int	TAG_FLOAT	The tag for CONSTANT_Float constant kind.
static final int	TAG_INTEGER	The tag for CONSTANT_Integer constant kind.
static final int	TAG_INTERFACE_METHODREF	The tag for CONSTANT_InterfaceMethodref constant kind.
static final int	TAG_INVOKE_DYNAMIC	The tag for CONSTANT_InvokeDynamic constant kind.
static final int	TAG_LONG	The tag for CONSTANT_Long constant kind.
static final int	TAG_METHOD_HANDLE	The tag for CONSTANT_MethodHandle constant kind.
static final int	TAG_METHOD_TYPE	The tag for CONSTANT_MethodType constant kind.
static final int	TAG_METHODREF	The tag for CONSTANT_Methodref constant kind.
static final int	TAG_MODULE	The tag for CONSTANT_Module constant kind.
static final int	TAG_NAME_AND_TYPE	The tag for CONSTANT_NameAndType constant kind.
static final int	TAG_PACKAGE	The tag for CONSTANT_Package constant kind.
static final int	TAG_STRING	The tag for CONSTANT_String constant kind.
static final int	TAG_UTF8	The tag for CONSTANT_Utf8 constant kind.

Method Summary

Modifier and Type	Method	Description
DirectMethodHandleDesc	asSymbol()	Returns a symbolic descriptor for this method handle.
default ConstantDesc	constantValue()	Returns a symbolic descriptor of this constant.
int	kind()	Returns the reference kind of this method handle (JVMS 4.4.8).
MemberRefEntry	reference()	Returns the constant pool entry describing the field or method, according to the reference kind.

Methods declared in interface LoadableConstantEntry

typeKind

Modifier and Type	Method	Description
default TypeKind	typeKind()	Returns the data type of this constant.

Methods declared in interface PoolEntry

constantPool, index, tag, width

Modifier and Type	Method	Description
ConstantPool	constantPool()	Returns the constant pool this entry is from.
int	index()	Returns the index within the constant pool corresponding to this entry.
int	tag()	Returns the constant pool tag that describes the type of this entry.
int	width()	Returns the number of constant pool slots this entry consumes.

Method Details

constantValue

default ConstantDesc constantValue()

Returns a symbolic descriptor of this constant.

This is equivalent to asSymbol().

Specified by:

constantValue in interface LoadableConstantEntry

Returns:

a symbolic descriptor of this constant

See Also:

• ConstantPoolBuilder.loadableConstantEntry(ConstantDesc)

kind

int kind()

Returns the reference kind of this method handle (JVMS 4.4.8).

Returns:

the reference kind of this method handle (JVMS 4.4.8)

See Also:

• Reference kinds

reference

MemberRefEntry reference()

Returns the constant pool entry describing the field or method, according to the reference kind.

Returns:

the constant pool entry describing the field or method, according to the reference kind

asSymbol

DirectMethodHandleDesc asSymbol()

Returns a symbolic descriptor for this method handle.

Returns:

a symbolic descriptor for this method handle

See Also:

• ConstantPoolBuilder::methodHandleEntry(DirectMethodHandleDesc)