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AbstractTypeVisitor6 (Java Platform SE 6) - JDK 5 Documentation v6.0, Java 2 SDK 英文文档

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javax.lang.model.util
Class AbstractTypeVisitor6<R,P>

java.lang.Object
  javax.lang.model.util.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:

SimpleTypeVisitor6

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public abstract class AbstractTypeVisitor6<R,P>
extends Object
implements TypeVisitor<R,P>

A skeletal visitor of types with default behavior appropriate for the version 6 language level.

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.

Since:

1.6

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Constructor Summary
protected	AbstractTypeVisitor6()           Constructor for concrete subclasses to call.

 

Method Summary
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.
R	visit(TypeMirror t, P p)           Visits any type mirror as if by passing itself to that type mirror's accept method.
R	visitUnknown(TypeMirror t, P p)           Visits an unknown kind of type.

 

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.type.TypeVisitor
visitArray, visitDeclared, visitError, visitExecutable, visitNoType, visitNull, visitPrimitive, visitTypeVariable, visitWildcard

 

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

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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

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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

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