Java™ Platform
Standard Ed. 6

javax.lang.model.util
Class AbstractElementVisitor6<R,P>

java.lang.Object
  extended by javax.lang.model.util.AbstractElementVisitor6<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:
ElementVisitor<R,P>
Direct Known Subclasses:
ElementScanner6, SimpleElementVisitor6

@SupportedSourceVersion(value=RELEASE_6)
public abstract class AbstractElementVisitor6<R,P>
extends Object
implements ElementVisitor<R,P>

A skeletal visitor of program elements with default behavior appropriate for the RELEASE_6 source version.

WARNING: The ElementVisitor 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 element 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.

Since:
1.6

Constructor Summary
protected AbstractElementVisitor6()
          Constructor for concrete subclasses to call.
 
Method Summary
 R visit(Element e)
          Visits any program element as if by passing itself to that element's accept method and passing null for the additional parameter.
 R visit(Element e, P p)
          Visits any program element as if by passing itself to that element's accept method.
 R visitUnknown(Element e, P p)
          Visits an unknown kind of element.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface javax.lang.model.element.ElementVisitor
visitExecutable, visitPackage, visitType, visitTypeParameter, visitVariable
 

Constructor Detail

AbstractElementVisitor6

protected AbstractElementVisitor6()
Constructor for concrete subclasses to call.

Method Detail

visit

public final R visit(Element e,
                     P p)
Visits any program element as if by passing itself to that element's accept method. The invocation v.visit(elem) is equivalent to elem.accept(v, p).

Specified by:
visit in interface ElementVisitor<R,P>
Parameters:
e - the element to visit
p - a visitor-specified parameter
Returns:
a visitor-specified result

visit

public final R visit(Element e)
Visits any program element as if by passing itself to that element's accept method and passing null for the additional parameter. The invocation v.visit(elem) is equivalent to elem.accept(v, null).

Specified by:
visit in interface ElementVisitor<R,P>
Parameters:
e - the element to visit
Returns:
a visitor-specified result

visitUnknown

public R visitUnknown(Element e,
                      P p)
Visits an unknown kind of element. This can occur if the language evolves and new kinds of elements are added to the Element hierarchy.

The default implementation of this method in AbstractElementVisitor6 will always throw UnknownElementException. This behavior is not required of a subclass.

Specified by:
visitUnknown in interface ElementVisitor<R,P>
Parameters:
e - the element to visit
p - a visitor-specified parameter
Returns:
a visitor-specified result
Throws:
UnknownElementException - a visitor implementation may optionally throw this exception

Java™ Platform
Standard Ed. 6

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