Module java.compiler
Package javax.lang.model.element

Interface ModuleElement.DirectiveVisitor<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.
Enclosing interface:
ModuleElement
public static interface ModuleElement.DirectiveVisitor<R,​P>
A visitor of module directives, in the style of the visitor design pattern. Classes implementing this interface are used to operate on a directive when the kind of directive is unknown at compile time. When a visitor is passed to a directive's accept method, the visitXyz method applicable to that directive is invoked.

Classes implementing this interface may or may not throw a NullPointerException if the additional parameter p is null; see documentation of the implementing class for details.

WARNING: It is possible that methods will be added to this interface to accommodate new, currently unknown, language structures added to future versions of the Java™ programming language. Methods to accommodate new language constructs will be added in a source compatible way using default methods.

Since:
9

  • Method Details

    • visit

      default R visit​(ModuleElement.Directive d)
      Visits any directive as if by passing itself to that directive's accept method and passing null for the additional parameter.
      Implementation Requirements:
      The default implementation is d.accept(v, null).
      Parameters:
      d - the directive to visit
      Returns:
      a visitor-specified result

    • visit

      default R visit​(ModuleElement.Directive d, P p)
      Visits any directive as if by passing itself to that directive's accept method.
      Implementation Requirements:
      The default implementation is d.accept(v, p).
      Parameters:
      d - the directive to visit
      p - a visitor-specified parameter
      Returns:
      a visitor-specified result

    • visitRequires

      R visitRequires​(ModuleElement.RequiresDirective d, P p)
      Visits a requires directive.
      Parameters:
      d - the directive to visit
      p - a visitor-specified parameter
      Returns:
      a visitor-specified result

    • visitExports

      R visitExports​(ModuleElement.ExportsDirective d, P p)
      Visits an exports directive.
      Parameters:
      d - the directive to visit
      p - a visitor-specified parameter
      Returns:
      a visitor-specified result

    • visitOpens

      R visitOpens​(ModuleElement.OpensDirective d, P p)
      Visits an opens directive.
      Parameters:
      d - the directive to visit
      p - a visitor-specified parameter
      Returns:
      a visitor-specified result

    • visitUses

      R visitUses​(ModuleElement.UsesDirective d, P p)
      Visits a uses directive.
      Parameters:
      d - the directive to visit
      p - a visitor-specified parameter
      Returns:
      a visitor-specified result

    • visitProvides

      R visitProvides​(ModuleElement.ProvidesDirective d, P p)
      Visits a provides directive.
      Parameters:
      d - the directive to visit
      p - a visitor-specified parameter
      Returns:
      a visitor-specified result

    • visitUnknown

      default R visitUnknown​(ModuleElement.Directive d, P p)
      Visits an unknown directive. This can occur if the language evolves and new kinds of directive are added.
      Implementation Requirements:
      The default implementation throws new UnknownDirectiveException(d, p).
      Parameters:
      d - the directive to visit
      p - a visitor-specified parameter
      Returns:
      a visitor-specified result
      Throws:
      UnknownDirectiveException - a visitor implementation may optionally throw this exception