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.ElementVisitor<R,P>
ElementScanner9
@SupportedSourceVersion(RELEASE_8) public class ElementScanner8<R,P> extends ElementScanner7<R,P>
RELEASE_8
source version. The visitXyz
methods in this class scan their component elements by calling scan
on their enclosed elements, parameters, etc., as indicated in the individual method specifications. A subclass can control the order elements are visited by overriding the visitXyz
methods. Note that clients of a scanner may get the desired behavior by invoking v.scan(e,
p)
rather than v.visit(e, p)
on the root objects of interest. When a subclass overrides a visitXyz
method, the new method can cause the enclosed elements to be scanned in the default way by calling super.visitXyz
. In this fashion, the concrete visitor can control the ordering of traversal over the component elements with respect to the additional processing; for example, consistently calling super.visitXyz
at the start of the overridden methods will yield a preorder traversal, etc. If the component elements should be traversed in some other order, instead of calling super.visitXyz
, an overriding visit method should call scan
with the elements in the desired order.
DEFAULT_VALUE
Modifier | Constructor | Description |
---|---|---|
protected |
Constructor for concrete subclasses; uses null for the default value. |
|
protected |
Constructor for concrete subclasses; uses the argument for the default value. |
visitVariable
scan, scan, scan, visitExecutable, visitPackage, visitType, visitTypeParameter
visit, visit, visitModule, visitRecordComponent, visitUnknown
protected ElementScanner8()
null
for the default value.protected ElementScanner8(R defaultValue)
defaultValue
- the default value
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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.compiler/javax/lang/model/util/ElementScanner8.html