TypeDescriptor.OfMethod | API reference

interface OfMethod<F : TypeDescriptor.OfField<F>!, M : TypeDescriptor.OfMethod<F, M>!> : TypeDescriptor

Known Direct Subclasses

MethodType

A method type represents the arguments and return type accepted and returned by a method handle, or the arguments and return type passed and expected by a method handle caller.

An entity that has a method type descriptor Method descriptors conforming to JVMS {@jvms 4.3.3} can be described

Summary

Public methods
abstract M	`changeParameterType(index: Int, paramType: F)` Return a method descriptor that is identical to this one, except that a single parameter type has been changed to the specified type.
abstract M	`changeReturnType(newReturn: F)` Return a method descriptor that is identical to this one, except that the return type has been changed to the specified type
abstract M	`dropParameterTypes(start: Int, end: Int)` Return a method descriptor that is identical to this one, except that a range of parameter types have been removed.
abstract M	`insertParameterTypes(pos: Int, vararg paramTypes: F)` Return a method descriptor that is identical to this one, except that a range of additional parameter types have been inserted.
abstract Array<F>!	`parameterArray()` Return an array of field descriptors for the parameter types of the method type described by this descriptor
abstract Int	`parameterCount()` Return the number of parameters in the method type
abstract MutableList<F>!	`parameterList()` Return an immutable list of field descriptors for the parameter types of the method type described by this descriptor
abstract F	`parameterType(i: Int)` Return a field descriptor describing the requested parameter of the method type described by this descriptor
abstract F	`returnType()` Return a field descriptor describing the return type of the method type described by this descriptor

Inherited functions

From class TypeDescriptor

String!

descriptorString()

Returns the descriptor string for this TypeDescriptor object. If this TypeDescriptor object can be described in nominal form, then this method returns a type descriptor as specified in JVMS {@jvms 4.3}. The result descriptor string can be used to produce a java.lang.constant.ConstantDesc nominal descriptor. Otherwise, the result string is not a type descriptor. No java.lang.constant.ConstantDesc nominal descriptor can be produced from the result string.

Public methods

changeParameterType

abstract fun changeParameterType(
    index: Int, 
    paramType: F
): M

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`	Int: the index of the parameter to change
`paramType`	F: a field descriptor describing the new parameter type

Return
`M`	the new method descriptor

Exceptions
`java.lang.IndexOutOfBoundsException`	if the index is outside the half-open range {[0, parameterCount)}
`java.lang.NullPointerException`	if any argument is `null`

changeReturnType

abstract fun changeReturnType(newReturn: F): M

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

Parameters
`newReturn`	F: a field descriptor for the new return type

Return
`M`	the new method descriptor

Exceptions
`java.lang.NullPointerException`	if any argument is `null`

dropParameterTypes

abstract fun dropParameterTypes(
    start: Int, 
    end: Int
): M

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

Parameters
`start`	Int: the index of the first parameter to remove
`end`	Int: the index after the last parameter to remove

Return
`M`	the new method descriptor

Exceptions
`java.lang.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

abstract fun insertParameterTypes(
    pos: Int, 
    vararg paramTypes: F
): M

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

Parameters
`pos`	Int: the index at which to insert the first inserted parameter
`paramTypes`	F: field descriptors describing the new parameter types to insert

Return
`M`	the new method descriptor

Exceptions
`java.lang.IndexOutOfBoundsException`	if `pos` is outside the closed range {[0, parameterCount]}
`java.lang.NullPointerException`	if any argument is `null`

parameterArray

abstract fun parameterArray(): Array<F>!

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

Return
`Array<F>!`	field descriptors for the parameter types

parameterCount

abstract fun parameterCount(): Int

Return the number of parameters in the method type

Return
`Int`	the number of parameters

parameterList

abstract fun parameterList(): MutableList<F>!

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

Return
`MutableList<F>!`	field descriptors for the parameter types

parameterType

abstract fun parameterType(i: Int): F

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

Parameters
`i`	Int: the index of the parameter

Return
`F`	a field descriptor for the requested parameter type

Exceptions
`java.lang.IndexOutOfBoundsException`	if the index is outside the half-open range {[0, parameterCount)}

returnType

abstract fun returnType(): F

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

Return
`F`	a field descriptor for the return type

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