Interface PermittedSubclassesAttribute

All Superinterfaces:: Attribute<PermittedSubclassesAttribute>, ClassElement, ClassFileElement

public sealed interface PermittedSubclassesAttribute extends Attribute<PermittedSubclassesAttribute>, ClassElement

Models the PermittedSubclasses attribute (JVMS Â§4.7.31), which indicates this class or interface is sealed, and which classes or interfaces may extend or implement this class or interface.

This attribute only appears on classes, and does not permit multiple instances in a class. It has a data dependency on the constant pool.

The attribute was introduced in the Java SE Platform version 17, major version 61.

See Java Language Specification:

8.1.1.2 sealed, non-sealed, and final Classes
9.1.1.4 sealed and non-sealed Interfaces

See Java Virtual Machine Specification:

4.7.31 The PermittedSubclasses Attribute

Since:

See Also:

Method Summary

Modifier and Type	Method	Description
`static PermittedSubclassesAttribute`	`of(ClassEntry... permittedSubclasses)`	Returns a `PermittedSubclasses` attribute.
`static PermittedSubclassesAttribute`	`of(List<ClassEntry> permittedSubclasses)`	Returns a `PermittedSubclasses` attribute.
`static PermittedSubclassesAttribute`	`ofSymbols(ClassDesc... permittedSubclasses)`	Returns a `PermittedSubclasses` attribute.
`static PermittedSubclassesAttribute`	`ofSymbols(List<ClassDesc> permittedSubclasses)`	Returns a `PermittedSubclasses` attribute.
`List<ClassEntry>`	`permittedSubclasses()`	Returns the list of permitted subclasses or subinterfaces.

Methods declared in interface Attribute

attributeMapper, attributeName

Modifier and Type	Method	Description
`AttributeMapper<PermittedSubclassesAttribute>`	`attributeMapper()`	Returns the `AttributeMapper` associated with this attribute.
`Utf8Entry`	`attributeName()`	Returns the name of the attribute.

Method Details

permittedSubclasses

List<ClassEntry> permittedSubclasses()

Returns the list of permitted subclasses or subinterfaces.

Returns:

the list of permitted subclasses or subinterfaces

See Also:

of

static PermittedSubclassesAttribute of(List<ClassEntry> permittedSubclasses)

Returns a PermittedSubclasses attribute.

Parameters:: permittedSubclasses - the permitted subclasses or subinterfaces
Returns:: a PermittedSubclasses attribute
Throws:: IllegalArgumentException - if the number of permitted subclasses or subinterfaces exceeds the limit of u2

of

static PermittedSubclassesAttribute of(ClassEntry... permittedSubclasses)

Returns a PermittedSubclasses attribute.

Parameters:: permittedSubclasses - the permitted subclasses or subinterfaces
Returns:: a PermittedSubclasses attribute
Throws:: IllegalArgumentException - if the number of permitted subclasses or subinterfaces exceeds the limit of u2

ofSymbols

static PermittedSubclassesAttribute ofSymbols(List<ClassDesc> permittedSubclasses)

Returns a PermittedSubclasses attribute.

Parameters:: permittedSubclasses - the permitted subclasses or subinterfaces
Returns:: a PermittedSubclasses attribute
Throws:: IllegalArgumentException - if any of permittedSubclasses is primitive, or if the number of permitted subclasses or subinterfaces exceeds the limit of u2

ofSymbols

static PermittedSubclassesAttribute ofSymbols(ClassDesc... permittedSubclasses)

Returns a PermittedSubclasses attribute.

Parameters:: permittedSubclasses - the permitted subclasses or subinterfaces
Returns:: a PermittedSubclasses attribute
Throws:: IllegalArgumentException - if any of permittedSubclasses is primitive, or if the number of permitted subclasses or subinterfaces exceeds the limit of u2

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