/**
* Returns the appropriate visitor that type checks the compilation unit according to the type
* system rules.
*
* <p>This implementation uses the checker naming convention to create the appropriate visitor. If
* no visitor is found, it returns an instance of {@link BaseTypeVisitor}. It reflectively invokes
* the constructor that accepts this checker and the compilation unit tree (in that order) as
* arguments.
*
* <p>Subclasses have to override this method to create the appropriate visitor if they do not
* follow the checker naming convention.
*
* @param root the compilation unit currently being visited
* @return the type-checking visitor
*/
@Override
protected SourceVisitor<?, ?> createSourceVisitor(CompilationUnitTree root) {
// Try to reflectively load the visitor.
Class<?> checkerClass = this.getClass();
while (checkerClass != BaseTypeChecker.class) {
final String classToLoad =
checkerClass.getName().replace("Checker", "Visitor").replace("Subchecker", "Visitor");
BaseTypeVisitor<?> result =
invokeConstructorFor(
classToLoad,
new Class<?>[] {checkerClass, CompilationUnitTree.class},
new Object[] {this, root});
if (result != null) return result;
checkerClass = checkerClass.getSuperclass();
}
// If a visitor couldn't be loaded reflectively, return the default.
return new BaseTypeVisitor<BaseTypeChecker>(this, root);
}
/**
* Constructs an instance of the appropriate type factory for the implemented type system.
*
* <p>The default implementation uses the checker naming convention to create the appropriate type
* factory. If no factory is found, it returns {@link BasicAnnotatedTypeFactory}. It reflectively
* invokes the constructor that accepts this checker and compilation unit tree (in that order) as
* arguments.
*
* <p>Subclasses have to override this method to create the appropriate visitor if they do not
* follow the checker naming convention.
*
* @param root the currently visited compilation unit
* @return the appropriate type factory
*/
@Override
public AnnotatedTypeFactory createFactory(CompilationUnitTree root) {
// Try to reflectively load the type factory.
Class<?> checkerClass = this.getClass();
while (checkerClass != BaseTypeChecker.class) {
final String classToLoad =
checkerClass
.getName()
.replace("Checker", "AnnotatedTypeFactory")
.replace("Subchecker", "AnnotatedTypeFactory");
AnnotatedTypeFactory result =
invokeConstructorFor(
classToLoad,
new Class<?>[] {checkerClass, CompilationUnitTree.class},
new Object[] {this, root});
if (result != null) return result;
checkerClass = checkerClass.getSuperclass();
}
return new BasicAnnotatedTypeFactory<BaseTypeChecker>(this, root);
}