/**
* Returns a set of triples {@code (expr, (result, annotation))} of conditional postconditions
* according to the given {@link EnsuresQualifierIf}.
*/
private Set<Pair<String, Pair<Boolean, String>>> getConditionalPostcondition(
AnnotationMirror ensuresAnnotationIf) {
if (ensuresAnnotationIf == null) {
return Collections.emptySet();
}
Set<Pair<String, Pair<Boolean, String>>> result = new HashSet<>();
List<String> expressions =
AnnotationUtils.getElementValueArray(
ensuresAnnotationIf, "expression", String.class, false);
String annotation =
AnnotationUtils.getElementValueClassName(ensuresAnnotationIf, "qualifier", false)
.toString();
boolean annoResult =
AnnotationUtils.getElementValue(ensuresAnnotationIf, "result", Boolean.class, false);
for (String expr : expressions) {
result.add(Pair.of(expr, Pair.of(annoResult, annotation)));
}
return result;
}
/**
* Given a category string that may be prepended with "fixable-", return the category enum that
* corresponds with the category and whether or not it is a isFixable error
*/
private static Pair<DiagnosticKind, Boolean> parseCategoryString(String category) {
final String fixable = "fixable-";
final boolean isFixable = category.startsWith(fixable);
if (isFixable) {
category = category.substring(fixable.length());
}
DiagnosticKind categoryEnum = DiagnosticKind.fromParseString(category);
return Pair.of(categoryEnum, isFixable);
}
/**
* Returns a set of triples {@code (expr, (result, annotation))} of conditional postconditions on
* the method {@code methodElement}.
*/
public Set<Pair<String, Pair<Boolean, String>>> getConditionalPostconditions(
ExecutableElement methodElement) {
Set<Pair<String, Pair<Boolean, String>>> result = new HashSet<>();
// Check for a single contract.
AnnotationMirror ensuresAnnotationIf =
factory.getDeclAnnotation(methodElement, EnsuresQualifierIf.class);
result.addAll(getConditionalPostcondition(ensuresAnnotationIf));
// Check for multiple contracts.
AnnotationMirror ensuresAnnotationsIf =
factory.getDeclAnnotation(methodElement, EnsuresQualifiersIf.class);
if (ensuresAnnotationsIf != null) {
List<AnnotationMirror> annotations =
AnnotationUtils.getElementValueArray(
ensuresAnnotationsIf, "value", AnnotationMirror.class, false);
for (AnnotationMirror a : annotations) {
result.addAll(getConditionalPostcondition(a));
}
}
// Check type-system specific annotations.
Class<ConditionalPostconditionAnnotation> metaAnnotation =
ConditionalPostconditionAnnotation.class;
List<Pair<AnnotationMirror, AnnotationMirror>> declAnnotations =
factory.getDeclAnnotationWithMetaAnnotation(methodElement, metaAnnotation);
for (Pair<AnnotationMirror, AnnotationMirror> r : declAnnotations) {
AnnotationMirror anno = r.first;
AnnotationMirror metaAnno = r.second;
List<String> expressions =
AnnotationUtils.getElementValueArray(anno, "expression", String.class, false);
String annotationString =
AnnotationUtils.getElementValueClassName(metaAnno, "qualifier", false).toString();
boolean annoResult = AnnotationUtils.getElementValue(anno, "result", Boolean.class, false);
for (String expr : expressions) {
result.add(Pair.of(expr, Pair.of(annoResult, annotationString)));
}
}
return result;
}
/**
* Returns a set of pairs {@code (expr, annotation)} of preconditions according to the given
* {@link RequiresQualifier}.
*/
private Set<Pair<String, String>> getPrecondition(AnnotationMirror requiresAnnotation) {
if (requiresAnnotation == null) {
return Collections.emptySet();
}
Set<Pair<String, String>> result = new HashSet<>();
List<String> expressions =
AnnotationUtils.getElementValueArray(requiresAnnotation, "expression", String.class, false);
String annotation =
AnnotationUtils.getElementValueClassName(requiresAnnotation, "qualifier", false).toString();
for (String expr : expressions) {
result.add(Pair.of(expr, annotation));
}
return result;
}
/**
* Returns a set of pairs {@code (expr, annotation)} of preconditions on the element {@code
* element}.
*/
public Set<Pair<String, String>> getPreconditions(Element element) {
Set<Pair<String, String>> result = new HashSet<>();
// Check for a single contract.
AnnotationMirror requiresAnnotation =
factory.getDeclAnnotation(element, RequiresQualifier.class);
result.addAll(getPrecondition(requiresAnnotation));
// Check for multiple contracts.
AnnotationMirror requiresAnnotations =
factory.getDeclAnnotation(element, RequiresQualifiers.class);
if (requiresAnnotations != null) {
List<AnnotationMirror> annotations =
AnnotationUtils.getElementValueArray(
requiresAnnotations, "value", AnnotationMirror.class, false);
for (AnnotationMirror a : annotations) {
result.addAll(getPrecondition(a));
}
}
// Check type-system specific annotations.
Class<PreconditionAnnotation> metaAnnotation = PreconditionAnnotation.class;
List<Pair<AnnotationMirror, AnnotationMirror>> declAnnotations =
factory.getDeclAnnotationWithMetaAnnotation(element, metaAnnotation);
for (Pair<AnnotationMirror, AnnotationMirror> r : declAnnotations) {
AnnotationMirror anno = r.first;
AnnotationMirror metaAnno = r.second;
List<String> expressions =
AnnotationUtils.getElementValueArray(anno, "value", String.class, false);
String annotationString =
AnnotationUtils.getElementValueClassName(metaAnno, "qualifier", false).toString();
for (String expr : expressions) {
result.add(Pair.of(expr, annotationString));
}
}
return result;
}
static Pair<Boolean, String> dropParentheses(final String str) {
if (str.charAt(0) == '(' && str.charAt(str.length() - 1) == ')') {
return Pair.of(true, str.substring(1, str.length() - 1));
}
return Pair.of(false, str);
}
private Pair<ParameterizedTypeTree, AnnotatedDeclaredType> extractParameterizedTypeTree(
Tree tree, AnnotatedDeclaredType type) {
ParameterizedTypeTree typeargtree = null;
switch (tree.getKind()) {
case VARIABLE:
Tree lt = ((VariableTree) tree).getType();
if (lt instanceof ParameterizedTypeTree) {
typeargtree = (ParameterizedTypeTree) lt;
} else {
// System.out.println("Found a: " + lt);
}
break;
case PARAMETERIZED_TYPE:
typeargtree = (ParameterizedTypeTree) tree;
break;
case NEW_CLASS:
NewClassTree nct = (NewClassTree) tree;
ExpressionTree nctid = nct.getIdentifier();
if (nctid.getKind() == Tree.Kind.PARAMETERIZED_TYPE) {
typeargtree = (ParameterizedTypeTree) nctid;
/*
* This is quite tricky... for anonymous class instantiations,
* the type at this point has no type arguments. By doing the
* following, we get the type arguments again.
*/
type = (AnnotatedDeclaredType) atypeFactory.getAnnotatedType(typeargtree);
}
break;
case ANNOTATED_TYPE:
AnnotatedTypeTree tr = (AnnotatedTypeTree) tree;
ExpressionTree undtr = tr.getUnderlyingType();
if (undtr instanceof ParameterizedTypeTree) {
typeargtree = (ParameterizedTypeTree) undtr;
} else if (undtr instanceof IdentifierTree) {
// @Something D -> Nothing to do
} else {
// TODO: add more test cases to ensure that nested types are
// handled correctly,
// e.g. @Nullable() List<@Nullable Object>[][]
Pair<ParameterizedTypeTree, AnnotatedDeclaredType> p =
extractParameterizedTypeTree(undtr, type);
typeargtree = p.first;
type = p.second;
}
break;
case IDENTIFIER:
case ARRAY_TYPE:
case NEW_ARRAY:
case MEMBER_SELECT:
case UNBOUNDED_WILDCARD:
case EXTENDS_WILDCARD:
case SUPER_WILDCARD:
case TYPE_PARAMETER:
// Nothing to do.
// System.out.println("Found a: " + (tree instanceof
// ParameterizedTypeTree));
break;
default:
// the parameterized type is the result of some expression tree.
// No need to do anything further.
break;
// System.err.printf("TypeValidator.visitDeclared unhandled tree: %s of kind %s\n",
// tree, tree.getKind());
}
return Pair.of(typeargtree, type);
}