javax.lang.model.util

Class AbstractTypeVisitor6<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:
    AbstractTypeVisitor7, SimpleTypeVisitor6 

    public abstract class AbstractTypeVisitor6<R,P>
extends Object
implements TypeVisitor<R,P>
    A skeletal visitor of types with default behavior appropriate for the RELEASE_6 source version.

    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 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 call the visitUnknown method. A new abstract 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 the new visitor is introduced, all or portions of this visitor may be deprecated.

    Note that adding a default implementation of a new visit method in a visitor class will occur instead of adding a default method directly in the visitor interface since a Java SE 8 language feature cannot be used to this version of the API since this version is required to be runnable on Java SE 7 implementations. Future versions of the API that are only required to run on Java SE 8 and later may take advantage of default methods in this situation.

    Since:
    1.6
    See Also:
    AbstractTypeVisitor7, AbstractTypeVisitor8

    • Constructor Detail

      • AbstractTypeVisitor6

        protected AbstractTypeVisitor6()
        Constructor for concrete subclasses to call.

    • Method Detail

      • visit

        public final R visit(TypeMirror t,
                     P p)
        Visits any type mirror as if by passing itself to that type mirror's accept method. The invocation v.visit(t, p) is equivalent to t.accept(v, p).
        Specified by:
        visit in interface  TypeVisitor<R,P>
        Parameters:
        t - the type to visit
        p - a visitor-specified parameter
        Returns:
        a visitor-specified result

      • visit

        public 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. The invocation v.visit(t) is equivalent to t.accept(v, null).
        Specified by:
        visit in interface  TypeVisitor<R,P>
        Parameters:
        t - the type to visit
        Returns:
        a visitor-specified result

      • visitUnion

        public R visitUnion(UnionType t,
                    P p)
        Visits a UnionType element by calling visitUnknown.
        Specified by:
        visitUnion in interface  TypeVisitor<R,P>
        Parameters:
        t - the type to visit
        p - a visitor-specified parameter
        Returns:
        the result of visitUnknown
        Since:
        1.7

      • visitIntersection

        public R visitIntersection(IntersectionType t,
                           P p)
        Visits an IntersectionType element by calling visitUnknown.
        Specified by:
        visitIntersection in interface  TypeVisitor<R,P>
        Parameters:
        t - the type to visit
        p - a visitor-specified parameter
        Returns:
        the result of visitUnknown
        Since:
        1.8

      • visitUnknown

        public R visitUnknown(TypeMirror t,
                      P p)
        Visits an unknown kind of type. This can occur if the language evolves and new kinds of types are added to the TypeMirror hierarchy.

        The default implementation of this method in AbstractTypeVisitor6 will always throw UnknownTypeException. This behavior is not required of a subclass.

        Specified by:
        visitUnknown in interface  TypeVisitor<R,P>
        Parameters:
        t - the type to visit
        p - a visitor-specified parameter
        Returns:
        a visitor-specified result
        Throws:
        UnknownTypeException - a visitor implementation may optionally throw this exception