Interface LoadableConstantEntry

All Superinterfaces:

PoolEntry

All Known Subinterfaces:

ClassEntry, ConstantDynamicEntry, ConstantValueEntry, DoubleEntry, FloatEntry, IntegerEntry, LongEntry, MethodHandleEntry, MethodTypeEntry, StringEntry

public sealed interface LoadableConstantEntry
extends PoolEntry
permits ClassEntry, ConstantDynamicEntry, ConstantValueEntry, MethodHandleEntry, MethodTypeEntry

Marker interface for constant pool entries suitable for loading via the ldc instructions.

The use of a LoadableConstantEntry is modeled by a ConstantDesc. Conversions are through ConstantPoolBuilder.loadableConstantEntry(ConstantDesc) and constantValue().

See Java Virtual Machine Specification:

4.4 The Constant Pool

Sealed Class Hierarchy Graph:

Since:

24

See Also:

• CodeBuilder.ldc(LoadableConstantEntry)

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
ConstantDesc	constantValue()	Returns a symbolic descriptor of this constant.
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

ConstantDesc constantValue()

Returns a symbolic descriptor of this constant.

Returns:

a symbolic descriptor of this constant

See Also:

• ConstantPoolBuilder.loadableConstantEntry(ConstantDesc)

typeKind

default TypeKind typeKind()

Returns the data type of this constant.

If the data type is of category 2, this constant must be loaded with ldc2_w; otherwise, the data type is of category 1, and this constant must be loaded with ldc or ldc_w.

Returns:

the data type of this constant