public void printAttribute(String label, Attribute attr) {
if (attr == null) {
printNull(label);
} else {
printString(label, attr.getClass().getSimpleName());
indent(+1);
attr.accept(attrVisitor);
indent(-1);
}
}
/**
* Extend suppression sets for both {@code @SuppressWarnings} and custom suppression annotations.
* When we explore a new node, we have to extend the suppression sets with any new suppressed
* warnings or custom suppression annotations. We also have to retain the previous suppression set
* so that we can reinstate it when we move up the tree.
*
* <p>We do not modify the existing suppression sets, so they can be restored when moving up the
* tree. We also avoid copying the suppression sets if the next node to explore does not have any
* suppressed warnings or custom suppression annotations. This is the common case.
*
* @param sym The {@code Symbol} for the AST node currently being scanned
* @param suppressWarningsType The {@code Type} for {@code @SuppressWarnings}, as given by javac's
* symbol table
* @param suppressionsOnCurrentPath The set of strings in all {@code @SuppressWarnings}
* annotations on the current path through the AST
* @param customSuppressionsOnCurrentPath The set of all custom suppression annotations
*/
public NewSuppressions extendSuppressionSets(
Symbol sym,
Type suppressWarningsType,
Set<String> suppressionsOnCurrentPath,
Set<Class<? extends Annotation>> customSuppressionsOnCurrentPath,
boolean inGeneratedCode) {
boolean newInGeneratedCode = inGeneratedCode || ASTHelpers.hasAnnotation(sym, Generated.class);
/** Handle custom suppression annotations. */
Set<Class<? extends Annotation>> newCustomSuppressions = null;
for (Class<? extends Annotation> annotationType : customSuppressionAnnotations) {
if (ASTHelpers.hasAnnotation(sym, annotationType)) {
if (newCustomSuppressions == null) {
newCustomSuppressions = new HashSet<>(customSuppressionsOnCurrentPath);
}
newCustomSuppressions.add(annotationType);
}
}
/** Handle @SuppressWarnings. */
Set<String> newSuppressions = null;
// Iterate over annotations on this symbol, looking for SuppressWarnings
for (Attribute.Compound attr : sym.getAnnotationMirrors()) {
// TODO(eaftan): use JavacElements.getAnnotation instead
if (attr.type.tsym == suppressWarningsType.tsym) {
for (List<Pair<MethodSymbol, Attribute>> v = attr.values; v.nonEmpty(); v = v.tail) {
Pair<MethodSymbol, Attribute> value = v.head;
if (value.fst.name.toString().equals("value"))
if (value.snd instanceof Attribute.Array) { // SuppressWarnings takes an array
for (Attribute suppress : ((Attribute.Array) value.snd).values) {
if (newSuppressions == null) {
newSuppressions = new HashSet<>(suppressionsOnCurrentPath);
}
// TODO(eaftan): check return value to see if this was a new warning?
newSuppressions.add((String) suppress.getValue());
}
} else {
throw new RuntimeException("Expected SuppressWarnings annotation to take array type");
}
}
}
}
return new NewSuppressions(newSuppressions, newCustomSuppressions, newInGeneratedCode);
}