SimpleTypeVisitor6 (Java SE 26 & JDK 26)
Description: declaration: module: java.compiler, package: javax.lang.model.util, class: SimpleTypeVisitor6
Keywords: javax.lang.model.util.SimpleTypeVisitor6 class

# Class SimpleTypeVisitor6<R,P>

java.lang.Object
javax.lang.model.util.AbstractTypeVisitor6<R,P>
javax.lang.model.util.SimpleTypeVisitor6<R,P>

Type Parameters:
  `R` - the return type of this visitor's methods. Use `Void` for visitors that do not need to return results.
  `P` - the type of the additional parameter to this visitor's methods. Use `Void` for visitors that do not need an additional parameter.

All Implemented Interfaces:
  `TypeVisitor<R,P>`

Direct Known Subclasses:
  `SimpleTypeVisitor7, TypeKindVisitor6`

@SupportedSourceVersion(RELEASE_6) public class SimpleTypeVisitor6<R,P> extends AbstractTypeVisitor6<R,P>
A simple visitor of types with default behavior appropriate for the `RELEASE_6` source version. Visit methods corresponding to `RELEASE_6` language constructs call `defaultAction`, passing their arguments to `defaultAction`'s corresponding parameters. For constructs introduced in `RELEASE_7` and later, `visitUnknown` is called instead.

API Note:
  Methods in this class may be overridden subject to their general contract.

  WARNING: The `TypeVisitor` interface implemented by this class may have methods added to it in the future to accommodate new, currently unknown, language structures added to future versions of the Java programming language. Therefore, methods whose names begin with `"visit"` may be added to this class in the future; to avoid incompatibilities, classes and subclasses which extend this class should not declare any instance methods with names beginning with `"visit"`.

  When such a new visit method is added, the default implementation in this class will be to directly or indirectly call the `visitUnknown` method. A new simple type visitor class will also be introduced to correspond to the new language level; this visitor will have different default behavior for the visit method in question. When a new visitor is introduced, portions of this visitor class may be deprecated, including its constructors.

Since:
  1.6
See Also:
  - `SimpleTypeVisitor7`
  - `SimpleTypeVisitor8`
  - `SimpleTypeVisitor9`
  - `SimpleTypeVisitor14`

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `protected final R`
  `DEFAULT_VALUE`
  Default value to be returned; `defaultAction` returns this value unless the method is overridden.

- ## Constructor Summary

  Constructors
  Modifier
  Constructor
  Description
  `protected`
  `SimpleTypeVisitor6()`
  Deprecated.
  Release 6 is obsolete; update to a visitor for a newer release level.
  `protected`
  `SimpleTypeVisitor6(R defaultValue)`
  Deprecated.
  Release 6 is obsolete; update to a visitor for a newer release level.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `protected R`
  `defaultAction(TypeMirror t, P p)`
  The default action for visit methods.
  `R`
  `visitArray(ArrayType t, P p)`
  Visits an array type.
  `R`
  `visitDeclared(DeclaredType t, P p)`
  Visits a declared type.
  `R`
  `visitError(ErrorType t, P p)`
  Visits an error type.
  `R`
  `visitExecutable(ExecutableType t, P p)`
  Visits an executable type.
  `R`
  `visitNoType(NoType t, P p)`
  Visits a `NoType` instance.
  `R`
  `visitNull(NullType t, P p)`
  Visits the null type.
  `R`
  `visitPrimitive(PrimitiveType t, P p)`
  Visits a primitive type.
  `R`
  `visitTypeVariable(TypeVariable t, P p)`
  Visits a type variable.
  `R`
  `visitWildcard(WildcardType t, P p)`
  Visits a wildcard type.

  ### Methods declared in class AbstractTypeVisitor6

  `visit, visit, visitIntersection, visitUnion, visitUnknown`
  Modifier and Type
  Method
  Description
  `final R`
  `visit(TypeMirror t)`
  Visits any type mirror as if by passing itself to that type mirror's `accept` method and passing `null` for the additional parameter.
  `final R`
  `visit(TypeMirror t, P p)`
  Visits any type mirror as if by passing itself to that type mirror's `accept` method.
  `R`
  `visitIntersection(IntersectionType t, P p)`
  Visits an intersection type.
  `R`
  `visitUnion(UnionType t, P p)`
  Visits a union type.
  `R`
  `visitUnknown(TypeMirror t, P p)`
  Visits an unknown kind of type.

  ### Methods declared in class Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`
  Modifier and Type
  Method
  Description
  `protected Object`
  `clone()`
  Creates and returns a copy of this object.
  `boolean`
  `equals(Object obj)`
  Indicates whether some other object is "equal to" this one.
  `protected void`
  `finalize()`
  Deprecated, for removal: This API element is subject to removal in a future version.
  Finalization is deprecated and subject to removal in a future release.
  `final Class<?>`
  `getClass()`
  Returns the runtime class of this `Object`.
  `int`
  `hashCode()`
  Returns a hash code value for this object.
  `final void`
  `notify()`
  Wakes up a single thread that is waiting on this object's monitor.
  `final void`
  `notifyAll()`
  Wakes up all threads that are waiting on this object's monitor.
  `String`
  `toString()`
  Returns a string representation of the object.
  `final void`
  `wait()`
  Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
  `final void`
  `wait(long timeoutMillis)`
  Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
  `final void`
  `wait(long timeoutMillis, int nanos)`
  Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

- ## Field Details

  - ### DEFAULT_VALUE

    protected final R DEFAULT_VALUE
    Default value to be returned; `defaultAction` returns this value unless the method is overridden.

- ## Constructor Details

  - ### SimpleTypeVisitor6

    @Deprecated(since="9") protected SimpleTypeVisitor6()
    Deprecated.
    Release 6 is obsolete; update to a visitor for a newer release level.
    Constructor for concrete subclasses; uses `null` for the default value.

  - ### SimpleTypeVisitor6

    @Deprecated(since="9") protected SimpleTypeVisitor6(R defaultValue)
    Deprecated.
    Release 6 is obsolete; update to a visitor for a newer release level.
    Constructor for concrete subclasses; uses the argument for the default value.
    Parameters:
      `defaultValue` - the value to assign to `DEFAULT_VALUE`

- ## Method Details

  - ### defaultAction

    protected R defaultAction(TypeMirror t, P p)
    The default action for visit methods.
    Implementation Requirements:
      The implementation in this class just returns `DEFAULT_VALUE`; subclasses will commonly override this method.
    Parameters:
      `t` - the type to process
      `p` - a visitor-specified parameter
    Returns:
      `DEFAULT_VALUE` unless overridden

  - ### visitPrimitive

    public R visitPrimitive(PrimitiveType t, P p)
    Visits a primitive type.
    Implementation Requirements:
      This implementation calls `defaultAction`.
    Parameters:
      `t` - the type to visit
      `p` - a visitor-specified parameter
    Returns:
      the result of `defaultAction`

  - ### visitNull

    public R visitNull(NullType t, P p)
    Visits the null type.
    Implementation Requirements:
      This implementation calls `defaultAction`.
    Parameters:
      `t` - the type to visit
      `p` - a visitor-specified parameter
    Returns:
      the result of `defaultAction`

  - ### visitArray

    public R visitArray(ArrayType t, P p)
    Visits an array type.
    Implementation Requirements:
      This implementation calls `defaultAction`.
    Parameters:
      `t` - the type to visit
      `p` - a visitor-specified parameter
    Returns:
      the result of `defaultAction`

  - ### visitDeclared

    public R visitDeclared(DeclaredType t, P p)
    Visits a declared type.
    Implementation Requirements:
      This implementation calls `defaultAction`.
    Parameters:
      `t` - the type to visit
      `p` - a visitor-specified parameter
    Returns:
      the result of `defaultAction`

  - ### visitError

    public R visitError(ErrorType t, P p)
    Visits an error type.
    Implementation Requirements:
      This implementation calls `defaultAction`.
    Parameters:
      `t` - the type to visit
      `p` - a visitor-specified parameter
    Returns:
      the result of `defaultAction`

  - ### visitTypeVariable

    public R visitTypeVariable(TypeVariable t, P p)
    Visits a type variable.
    Implementation Requirements:
      This implementation calls `defaultAction`.
    Parameters:
      `t` - the type to visit
      `p` - a visitor-specified parameter
    Returns:
      the result of `defaultAction`

  - ### visitWildcard

    public R visitWildcard(WildcardType t, P p)
    Visits a wildcard type.
    Implementation Requirements:
      This implementation calls `defaultAction`.
    Parameters:
      `t` - the type to visit
      `p` - a visitor-specified parameter
    Returns:
      the result of `defaultAction`

  - ### visitExecutable

    public R visitExecutable(ExecutableType t, P p)
    Visits an executable type.
    Implementation Requirements:
      This implementation calls `defaultAction`.
    Parameters:
      `t` - the type to visit
      `p` - a visitor-specified parameter
    Returns:
      the result of `defaultAction`

  - ### visitNoType

    public R visitNoType(NoType t, P p)
    Visits a `NoType` instance.
    Implementation Requirements:
      This implementation calls `defaultAction`.
    Parameters:
      `t` - the type to visit
      `p` - a visitor-specified parameter
    Returns:
      the result of `defaultAction`