Module java.base

Package java.lang.invoke

Interface TypeDescriptor.OfMethod<F extends TypeDescriptor.OfField<F>,M extends TypeDescriptor.OfMethod<F,M>>

Type Parameters:

F - the type representing field type descriptors

M - the class implementing TypeDescriptor.OfMethod

All Superinterfaces:

TypeDescriptor

All Known Subinterfaces:

MethodTypeDesc

All Known Implementing Classes:

MethodType

Enclosing interface:

TypeDescriptor

public static interface TypeDescriptor.OfMethod<F extends TypeDescriptor.OfField<F>,M extends TypeDescriptor.OfMethod<F,M>>
extends TypeDescriptor

An entity that has a method type descriptor Method descriptors conforming to JVMS 4.3.3 can be described nominally via MethodType::describeConstable; otherwise they cannot be described nominally.

See Java Virtual Machine Specification:

4.3.2 Field Descriptors
4.3.3 Method Descriptors

Since:

12

Nested Class Summary

Nested classes/interfaces declared in interface java.lang.invoke.TypeDescriptor

TypeDescriptor.OfField<F extends TypeDescriptor.OfField<F>>, TypeDescriptor.OfMethod<F extends TypeDescriptor.OfField<F>,M extends TypeDescriptor.OfMethod<F,M>>

Method Summary

Modifier and Type	Method	Description
M	changeParameterType(int index, F paramType)	Return a method descriptor that is identical to this one, except that a single parameter type has been changed to the specified type.
M	changeReturnType(F newReturn)	Return a method descriptor that is identical to this one, except that the return type has been changed to the specified type
M	dropParameterTypes(int start, int end)	Return a method descriptor that is identical to this one, except that a range of parameter types have been removed.
M	insertParameterTypes(int pos, F... paramTypes)	Return a method descriptor that is identical to this one, except that a range of additional parameter types have been inserted.
F[]	parameterArray()	Return an array of field descriptors for the parameter types of the method type described by this descriptor
int	parameterCount()	Return the number of parameters in the method type
List<F>	parameterList()	Return an immutable list of field descriptors for the parameter types of the method type described by this descriptor
F	parameterType(int i)	Return a field descriptor describing the requested parameter of the method type described by this descriptor
F	returnType()	Return a field descriptor describing the return type of the method type described by this descriptor

Methods declared in interface java.lang.invoke.TypeDescriptor

descriptorString

Method Details

parameterCount

int parameterCount()

Return the number of parameters in the method type

Returns:

the number of parameters

parameterType

F parameterType(int i)

Return a field descriptor describing the requested parameter of the method type described by this descriptor

Parameters:

i - the index of the parameter

Returns:

a field descriptor for the requested parameter type

Throws:

IndexOutOfBoundsException - if the index is outside the half-open range {[0, parameterCount)}

returnType

F returnType()

Return a field descriptor describing the return type of the method type described by this descriptor

Returns:

a field descriptor for the return type

parameterArray

F[] parameterArray()

Return an array of field descriptors for the parameter types of the method type described by this descriptor

Returns:

field descriptors for the parameter types

parameterList

List<F> parameterList()

Return an immutable list of field descriptors for the parameter types of the method type described by this descriptor

Returns:

field descriptors for the parameter types

changeReturnType

M changeReturnType(F newReturn)

Return a method descriptor that is identical to this one, except that the return type has been changed to the specified type

Parameters:

newReturn - a field descriptor for the new return type

Returns:

the new method descriptor

Throws:

NullPointerException - if any argument is null

changeParameterType

M changeParameterType(int index,
 F paramType)

Return a method descriptor that is identical to this one, except that a single parameter type has been changed to the specified type.

Parameters:

index - the index of the parameter to change

paramType - a field descriptor describing the new parameter type

Returns:

the new method descriptor

Throws:

NullPointerException - if any argument is null

IndexOutOfBoundsException - if the index is outside the half-open range {[0, parameterCount)}

dropParameterTypes

M dropParameterTypes(int start,
 int end)

Return a method descriptor that is identical to this one, except that a range of parameter types have been removed.

Parameters:

start - the index of the first parameter to remove

end - the index after the last parameter to remove

Returns:

the new method descriptor

Throws:

IndexOutOfBoundsException - if start is outside the half-open range [0, parameterCount), or end is outside the closed range [0, parameterCount], or if start > end

insertParameterTypes

M insertParameterTypes(int pos,
 F... paramTypes)

Return a method descriptor that is identical to this one, except that a range of additional parameter types have been inserted.

Parameters:

pos - the index at which to insert the first inserted parameter

paramTypes - field descriptors describing the new parameter types to insert

Returns:

the new method descriptor

Throws:

NullPointerException - if any argument is null

IndexOutOfBoundsException - if pos is outside the closed range {[0, parameterCount]}