@Override
public void handle(
final AnnotationValues<ListenerSupport> annotation,
final JCAnnotation source,
final JavacNode annotationNode) {
deleteAnnotationIfNeccessary(annotationNode, ListenerSupport.class);
JavacType type = JavacType.typeOf(annotationNode, source);
if (type.isAnnotation() || type.isInterface()) {
annotationNode.addError(canBeUsedOnClassAndEnumOnly(ListenerSupport.class));
return;
}
List<Object> listenerInterfaces = annotation.getActualExpressions("value");
if (listenerInterfaces.isEmpty()) {
annotationNode.addError(
String.format(
"@%s has no effect since no interface types were specified.",
ListenerSupport.class.getName()));
return;
}
List<TypeSymbol> resolvedInterfaces =
resolveInterfaces(annotationNode, ListenerSupport.class, listenerInterfaces);
for (TypeSymbol interfaze : resolvedInterfaces) {
handler.addListenerField(type, interfaze);
handler.addAddListenerMethod(type, interfaze);
handler.addRemoveListenerMethod(type, interfaze);
addFireListenerMethods(type, interfaze);
}
type.editor().rebuild();
}
private List<TypeSymbol> resolveInterfaces(
final JavacNode annotationNode,
final Class<? extends java.lang.annotation.Annotation> annotationType,
final List<Object> listenerInterfaces) {
List<TypeSymbol> resolvedInterfaces = new ArrayList<TypeSymbol>();
for (Object listenerInterface : listenerInterfaces) {
if (listenerInterface instanceof JCFieldAccess) {
JCFieldAccess interfaze = (JCFieldAccess) listenerInterface;
if ("class".equals(As.string(interfaze.name))) {
Type interfaceType = CLASS.resolveMember(annotationNode, interfaze.selected);
if (interfaceType == null) continue;
if (interfaceType.isInterface()) {
TypeSymbol interfaceSymbol = interfaceType.asElement();
if (interfaceSymbol != null) resolvedInterfaces.add(interfaceSymbol);
} else {
annotationNode.addWarning(
String.format(
"@%s works only with interfaces. %s was skipped",
annotationType.getName(), listenerInterface));
}
}
}
}
return resolvedInterfaces;
}
@Override
protected void createParamsAndArgs(
final Object method, final List<Argument> params, final List<Expression<?>> args) {
MethodType mtype = (MethodType) type(method);
if (mtype.argtypes.isEmpty()) return;
int argCounter = 0;
for (Type parameter : mtype.getParameterTypes()) {
String arg = "arg" + argCounter++;
params.add(Arg(Type(parameter), arg));
args.add(Name(arg));
}
}