Interface MethodTypeDesc

All Superinterfaces:: ConstantDesc,TypeDescriptor,TypeDescriptor.OfMethod<ClassDesc,MethodTypeDesc>

public interfaceMethodTypeDescextendsConstantDesc,TypeDescriptor.OfMethod<ClassDesc,MethodTypeDesc>

Anominal descriptor for aMethodType constant.

API Note:: In the future, if the Java language permits,MethodTypeDesc may become asealed interface, which would prohibit subclassing except by explicitly permitted types. Non-platform classes should not implementMethodTypeDesc directly.
Since:: 12

Nested Class Summary
Nested classes/interfaces declared in interface java.lang.invoke.TypeDescriptor
TypeDescriptor.OfField<F extendsTypeDescriptor.OfField<F>>,TypeDescriptor.OfMethod<F extendsTypeDescriptor.OfField<F>,M extendsTypeDescriptor.OfMethod<F,M>>
Method Summary
Modifier and Type
Method
Description
MethodTypeDesc
changeParameterType(int index,ClassDesc paramType)
Returns aMethodTypeDesc that is identical to this one, except that a single parameter type has been changed to the specified type.
MethodTypeDesc
changeReturnType(ClassDesc returnType)
Returns aMethodTypeDesc that is identical to this one, except with the specified return type.
defaultString
descriptorString()
Returns the method type descriptor string.
defaultString
displayDescriptor()
Returns a human-readable descriptor for this method type, using the canonical names for parameter and return types.
MethodTypeDesc
dropParameterTypes(int start, int end)
Returns aMethodTypeDesc that is identical to this one, except that a range of parameter types have been removed.
boolean
equals(Object o)
Compares the specified object with this descriptor for equality.
MethodTypeDesc
insertParameterTypes(int pos,ClassDesc... paramTypes)
Returns aMethodTypeDesc that is identical to this one, except that a range of additional parameter types have been inserted.
staticMethodTypeDesc
of(ClassDesc returnDesc,ClassDesc... paramDescs)
Returns aMethodTypeDesc given the return type and parameter types.
staticMethodTypeDesc
ofDescriptor(String descriptor)
Creates aMethodTypeDesc given a method descriptor string.
ClassDesc[]
parameterArray()
Returns the parameter types as an array.
int
parameterCount()
Returns the number of parameters of the method type described by thisMethodTypeDesc.
List<ClassDesc>
parameterList()
Returns the parameter types as an immutableList.
ClassDesc
parameterType(int index)
Returns the parameter type of theindex'th parameter of the method type described by thisMethodTypeDesc.
ClassDesc
returnType()
Gets the return type of the method type described by thisMethodTypeDesc.
Methods declared in interface java.lang.constant.ConstantDesc
resolveConstantDesc

Method Details
- ofDescriptor
  static MethodTypeDesc ofDescriptor(String descriptor)
  Creates aMethodTypeDesc given a method descriptor string.
  Parameters:
  descriptor - a method descriptor string
  Returns:
  aMethodTypeDesc describing the desired method type
  Throws:
  NullPointerException - if the argument isnull
  IllegalArgumentException - if the descriptor string is not a valid method descriptor
  SeeJava Virtual Machine Specification:
  4.3.3 Method Descriptors
- of
  static MethodTypeDesc of(ClassDesc returnDesc,ClassDesc... paramDescs)
  Returns aMethodTypeDesc given the return type and parameter types.
  Parameters:
  returnDesc - aClassDesc describing the return type
  paramDescs -ClassDescs describing the argument types
  Returns:
  aMethodTypeDesc describing the desired method type
  Throws:
  NullPointerException - if any argument or its contents arenull
  IllegalArgumentException - if any element ofparamDescs is aClassDesc forvoid
- returnType
  ClassDesc returnType()
  Gets the return type of the method type described by thisMethodTypeDesc.
  Specified by:
  returnType in interface TypeDescriptor.OfMethod<ClassDesc,MethodTypeDesc>
  Returns:
  aClassDesc describing the return type of the method type
- parameterCount
  int parameterCount()
  Returns the number of parameters of the method type described by thisMethodTypeDesc.
  Specified by:
  parameterCount in interface TypeDescriptor.OfMethod<ClassDesc,MethodTypeDesc>
  Returns:
  the number of parameters
- parameterType
  ClassDesc parameterType(int index)
  Returns the parameter type of theindex'th parameter of the method type described by thisMethodTypeDesc.
  Specified by:
  parameterType in interface TypeDescriptor.OfMethod<ClassDesc,MethodTypeDesc>
  Parameters:
  index - the index of the parameter to retrieve
  Returns:
  aClassDesc describing the desired parameter type
  Throws:
  IndexOutOfBoundsException - if the index is outside the half-open range {[0, parameterCount())}
- parameterList
  List<ClassDesc> parameterList()
  Returns the parameter types as an immutableList.
  Specified by:
  parameterList in interface TypeDescriptor.OfMethod<ClassDesc,MethodTypeDesc>
  Returns:
  aList ofClassDesc describing the parameter types
- parameterArray
  ClassDesc[] parameterArray()
  Returns the parameter types as an array.
  Specified by:
  parameterArray in interface TypeDescriptor.OfMethod<ClassDesc,MethodTypeDesc>
  Returns:
  an array ofClassDesc describing the parameter types
- changeReturnType
  MethodTypeDesc changeReturnType(ClassDesc returnType)
  Returns aMethodTypeDesc that is identical to this one, except with the specified return type.
  Specified by:
  changeReturnType in interface TypeDescriptor.OfMethod<ClassDesc,MethodTypeDesc>
  Parameters:
  returnType - aClassDesc describing the new return type
  Returns:
  aMethodTypeDesc describing the desired method type
  Throws:
  NullPointerException - if the argument isnull
- changeParameterType
  MethodTypeDesc changeParameterType(int index,ClassDesc paramType)
  Returns aMethodTypeDesc that is identical to this one, except that a single parameter type has been changed to the specified type.
  Specified by:
  changeParameterType in interface TypeDescriptor.OfMethod<ClassDesc,MethodTypeDesc>
  Parameters:
  index - the index of the parameter to change
  paramType - aClassDesc describing the new parameter type
  Returns:
  aMethodTypeDesc describing the desired method type
  Throws:
  NullPointerException - if any argument isnull
  IndexOutOfBoundsException - if the index is outside the half-open range {[0, parameterCount)}
- dropParameterTypes
  MethodTypeDesc dropParameterTypes(int start, int end)
  Returns aMethodTypeDesc that is identical to this one, except that a range of parameter types have been removed.
  Specified by:
  dropParameterTypes in interface TypeDescriptor.OfMethod<ClassDesc,MethodTypeDesc>
  Parameters:
  start - the index of the first parameter to remove
  end - the index after the last parameter to remove
  Returns:
  aMethodTypeDesc describing the desired method type
  Throws:
  IndexOutOfBoundsException - ifstart is outside the half-open range[0, parameterCount), orend is outside the closed range[0, parameterCount], or ifstart > end
- insertParameterTypes
  MethodTypeDesc insertParameterTypes(int pos,ClassDesc... paramTypes)
  Returns aMethodTypeDesc that is identical to this one, except that a range of additional parameter types have been inserted.
  Specified by:
  insertParameterTypes in interface TypeDescriptor.OfMethod<ClassDesc,MethodTypeDesc>
  Parameters:
  pos - the index at which to insert the first inserted parameter
  paramTypes -ClassDescs describing the new parameter types to insert
  Returns:
  aMethodTypeDesc describing the desired method type
  Throws:
  NullPointerException - if any argument or its contents arenull
  IndexOutOfBoundsException - ifpos is outside the closed range {[0, parameterCount]}
  IllegalArgumentException - if any element ofparamTypes is aClassDesc forvoid
- descriptorString
  default String descriptorString()
  Returns the method type descriptor string.
  Specified by:
  descriptorString in interface TypeDescriptor
  Returns:
  the method type descriptor string
  SeeJava Virtual Machine Specification:
  4.3.3 Method Descriptors
- displayDescriptor
  default String displayDescriptor()
  Returns a human-readable descriptor for this method type, using the canonical names for parameter and return types.
  Returns:
  the human-readable descriptor for this method type
- equals
  boolean equals(Object o)
  Compares the specified object with this descriptor for equality. Returnstrue if and only if the specified object is also aMethodTypeDesc both have the same arity, their return types are equal, and each pair of corresponding parameter types are equal.
  Overrides:
  equals in class Object
  Parameters:
  o - the other object
  Returns:
  whether this descriptor is equal to the other object
  See Also:
  Object.hashCode(),HashMap

Movatterモバイル変換

Interface MethodTypeDesc

Nested Class Summary

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

Method Summary

Methods declared in interface java.lang.constant.ConstantDesc

Method Details

ofDescriptor

of

returnType

parameterCount

parameterType

parameterList

parameterArray

changeReturnType

changeParameterType

dropParameterTypes

insertParameterTypes

descriptorString

displayDescriptor

equals