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package javax.lang.model.util;
import javax.lang.model.type.*;
import javax.annotation.processing.SupportedSourceVersion;
import javax.lang.model.SourceVersion;
import static javax.lang.model.SourceVersion.*;
/**
* A simple visitor of types with default behavior appropriate for the
* {@link SourceVersion#RELEASE_6 RELEASE_6} source version.
*
* Visit methods corresponding to {@code RELEASE_6} language
* constructs call {@link #defaultAction defaultAction}, passing their
* arguments to {@code defaultAction}'s corresponding parameters.
*
* For constructs introduced in {@code RELEASE_7} and later, {@code
* visitUnknown} is called instead.
*
*
* @apiNote
* Methods in this class may be overridden subject to their general
* contract.
*
* WARNING: The {@code
* 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
* {@code "visit"} may be added to this class in the future; to avoid
* incompatibilities, classes and subclasses which extend this class
* should not declare any instance methods with names beginning with
* {@code "visit"}.
*
* When such a new visit method is added, the default
* implementation in this class will be to directly or indirectly call
* the {@link #visitUnknown visitUnknown} method. A new simple 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 a new visitor is
* introduced, portions of this visitor class may be deprecated,
* including its constructors.
*
* @param the return type of this visitor's methods. Use {@link
* Void} for visitors that do not need to return results.
* @param the type of the additional parameter to this visitor's
* methods. Use {@code Void} for visitors that do not need an
* additional parameter.
*
* @see SimpleTypeVisitor7
* @see SimpleTypeVisitor8
* @see SimpleTypeVisitor9
* @see SimpleTypeVisitor14
* @since 1.6
*/
@SupportedSourceVersion(RELEASE_6)
public class SimpleTypeVisitor6 extends AbstractTypeVisitor6 {
/**
* Default value to be returned; {@link #defaultAction
* defaultAction} returns this value unless the method is
* overridden.
*/
protected final R DEFAULT_VALUE;
/**
* Constructor for concrete subclasses; uses {@code null} for the
* default value.
* @deprecated Release 6 is obsolete; update to a visitor for a newer
* release level.
*/
@Deprecated()
protected SimpleTypeVisitor6(){
DEFAULT_VALUE = null;
}
/**
* Constructor for concrete subclasses; uses the argument for the
* default value.
*
* @param defaultValue the value to assign to {@link #DEFAULT_VALUE}
* @deprecated Release 6 is obsolete; update to a visitor for a newer
* release level.
*/
@Deprecated()
protected SimpleTypeVisitor6(R defaultValue){
DEFAULT_VALUE = defaultValue;
}
/**
* The default action for visit methods.
*
* @implSpec The implementation in this class just returns {@link
* #DEFAULT_VALUE}; subclasses will commonly override this method.
*
* @param t the type to process
* @param p a visitor-specified parameter
* @return {@code DEFAULT_VALUE} unless overridden
*/
protected R defaultAction(TypeMirror t, P p) {
return DEFAULT_VALUE;
}
/**
* {@inheritDoc}
*
* @implSpec This implementation calls {@code defaultAction}.
*
* @param t {@inheritDoc}
* @param p {@inheritDoc}
* @return the result of {@code defaultAction}
*/
public R visitPrimitive(PrimitiveType t, P p) {
return defaultAction(t, p);
}
/**
* {@inheritDoc} This implementation calls {@code defaultAction}.
*
* @implSpec This implementation calls {@code defaultAction}.
*
* @param t {@inheritDoc}
* @param p {@inheritDoc}
* @return the result of {@code defaultAction}
*/
public R visitNull(NullType t, P p){
return defaultAction(t, p);
}
/**
* {@inheritDoc}
*
* @implSpec This implementation calls {@code defaultAction}.
*
* @param t {@inheritDoc}
* @param p {@inheritDoc}
* @return the result of {@code defaultAction}
*/
public R visitArray(ArrayType t, P p){
return defaultAction(t, p);
}
/**
* {@inheritDoc}
*
* @implSpec This implementation calls {@code defaultAction}.
*
* @param t {@inheritDoc}
* @param p {@inheritDoc}
* @return the result of {@code defaultAction}
*/
public R visitDeclared(DeclaredType t, P p){
return defaultAction(t, p);
}
/**
* {@inheritDoc}
*
* @implSpec This implementation calls {@code defaultAction}.
*
* @param t {@inheritDoc}
* @param p {@inheritDoc}
* @return the result of {@code defaultAction}
*/
public R visitError(ErrorType t, P p){
return defaultAction(t, p);
}
/**
* {@inheritDoc}
*
* @implSpec This implementation calls {@code defaultAction}.
*
* @param t {@inheritDoc}
* @param p {@inheritDoc}
* @return the result of {@code defaultAction}
*/
public R visitTypeVariable(TypeVariable t, P p){
return defaultAction(t, p);
}
/**
* {@inheritDoc}
*
* @implSpec This implementation calls {@code defaultAction}.
*
* @param t {@inheritDoc}
* @param p {@inheritDoc}
* @return the result of {@code defaultAction}
*/
public R visitWildcard(WildcardType t, P p){
return defaultAction(t, p);
}
/**
* {@inheritDoc}
*
* @implSpec This implementation calls {@code defaultAction}.
*
* @param t {@inheritDoc}
* @param p {@inheritDoc}
* @return the result of {@code defaultAction}
*/
public R visitExecutable(ExecutableType t, P p) {
return defaultAction(t, p);
}
/**
* {@inheritDoc}
*
* @implSpec This implementation calls {@code defaultAction}.
*
* @param t {@inheritDoc}
* @param p {@inheritDoc}
* @return the result of {@code defaultAction}
*/
public R visitNoType(NoType t, P p){
return defaultAction(t, p);
}
}