Module java.compiler
Package javax.lang.model.element
Interface ModuleElement.DirectiveVisitor<R,P>
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- Type Parameters:
R- the return type of this visitor's methods. UseVoidfor visitors that do not need to return results.P- the type of the additional parameter to this visitor's methods. UseVoidfor 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'sacceptmethod, thevisitXyzmethod applicable to that directive is invoked.Classes implementing this interface may or may not throw a
NullPointerExceptionif the additional parameterpisnull; 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
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Method Summary
All Methods Instance Methods Abstract Methods Default Methods Modifier and Type Method Description default Rvisit(ModuleElement.Directive d)Visits any directive as if by passing itself to that directive'sacceptmethod and passingnullfor the additional parameter.default Rvisit(ModuleElement.Directive d, P p)Visits any directive as if by passing itself to that directive'sacceptmethod.RvisitExports(ModuleElement.ExportsDirective d, P p)Visits anexportsdirective.RvisitOpens(ModuleElement.OpensDirective d, P p)Visits anopensdirective.RvisitProvides(ModuleElement.ProvidesDirective d, P p)Visits aprovidesdirective.RvisitRequires(ModuleElement.RequiresDirective d, P p)Visits arequiresdirective.default RvisitUnknown(ModuleElement.Directive d, P p)Visits an unknown directive.RvisitUses(ModuleElement.UsesDirective d, P p)Visits ausesdirective.
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Method Detail
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visit
default R visit(ModuleElement.Directive d)
Visits any directive as if by passing itself to that directive'sacceptmethod and passingnullfor the additional parameter.- Implementation Requirements:
- The default implementation is
d.accept(v, null). - Parameters:
d- the directive to visit- Returns:
- a visitor-specified result
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visit
default R visit(ModuleElement.Directive d, P p)
Visits any directive as if by passing itself to that directive'sacceptmethod.- Implementation Requirements:
- The default implementation is
d.accept(v, p). - Parameters:
d- the directive to visitp- a visitor-specified parameter- Returns:
- a visitor-specified result
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visitRequires
R visitRequires(ModuleElement.RequiresDirective d, P p)
Visits arequiresdirective.- Parameters:
d- the directive to visitp- a visitor-specified parameter- Returns:
- a visitor-specified result
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visitExports
R visitExports(ModuleElement.ExportsDirective d, P p)
Visits anexportsdirective.- Parameters:
d- the directive to visitp- a visitor-specified parameter- Returns:
- a visitor-specified result
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visitOpens
R visitOpens(ModuleElement.OpensDirective d, P p)
Visits anopensdirective.- Parameters:
d- the directive to visitp- a visitor-specified parameter- Returns:
- a visitor-specified result
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visitUses
R visitUses(ModuleElement.UsesDirective d, P p)
Visits ausesdirective.- Parameters:
d- the directive to visitp- a visitor-specified parameter- Returns:
- a visitor-specified result
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visitProvides
R visitProvides(ModuleElement.ProvidesDirective d, P p)
Visits aprovidesdirective.- Parameters:
d- the directive to visitp- a visitor-specified parameter- Returns:
- a visitor-specified result
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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 visitp- a visitor-specified parameter- Returns:
- a visitor-specified result
- Throws:
UnknownDirectiveException- a visitor implementation may optionally throw this exception
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