// interpreting 'type' as a provided type, compute the provide null bits
// we inspect the main type plus bounds of type variables and wildcards
static long providedNullTagBits(TypeBinding type) {
long tagBits = type.tagBits & TagBits.AnnotationNullMASK;
if (tagBits != 0) return validNullTagBits(tagBits);
if (type.isWildcard()) { // wildcard can be 'provided' during inheritance checks
WildcardBinding wildcard = (WildcardBinding) type;
if (wildcard.boundKind == Wildcard.UNBOUND) return 0;
tagBits = wildcard.bound.tagBits & TagBits.AnnotationNullMASK;
if (tagBits == 0) return 0;
switch (wildcard.boundKind) {
case Wildcard.EXTENDS:
if (tagBits == TagBits.AnnotationNonNull) return TagBits.AnnotationNonNull;
return TagBits.AnnotationNullMASK; // @Nullable or better
case Wildcard.SUPER:
if (tagBits == TagBits.AnnotationNullable) return TagBits.AnnotationNullable;
return TagBits.AnnotationNullMASK; // @NonNull or worse
}
return 0;
}
if (type.isTypeVariable()) { // incl. captures
TypeVariableBinding typeVariable = (TypeVariableBinding) type;
boolean haveNullBits = false;
if (typeVariable.isCapture()) {
TypeBinding lowerBound = ((CaptureBinding) typeVariable).lowerBound;
if (lowerBound != null) {
tagBits = lowerBound.tagBits & TagBits.AnnotationNullMASK;
if (tagBits == TagBits.AnnotationNullable)
return TagBits.AnnotationNullable; // cannot be @NonNull
haveNullBits |= (tagBits != 0);
}
}
if (typeVariable.firstBound != null) {
long boundBits = typeVariable.firstBound.tagBits & TagBits.AnnotationNullMASK;
if (boundBits == TagBits.AnnotationNonNull)
return TagBits.AnnotationNonNull; // cannot be @Nullable
haveNullBits |= (boundBits != 0);
}
if (haveNullBits)
return TagBits
.AnnotationNullMASK; // could be either, can only match to a wildcard accepting both
}
return 0;
}
/*
* @see ITypeBinding#getDeclaringClass()
*/
public synchronized ITypeBinding getDeclaringClass() {
if (isClass() || isInterface() || isEnum()) {
ReferenceBinding referenceBinding = (ReferenceBinding) this.binding;
if (referenceBinding.isNestedType()) {
try {
return this.resolver.getTypeBinding(referenceBinding.enclosingType());
} catch (RuntimeException e) {
/* in case a method cannot be resolvable due to missing jars on the classpath
* see https://bugs.eclipse.org/bugs/show_bug.cgi?id=57871
* https://bugs.eclipse.org/bugs/show_bug.cgi?id=63550
* https://bugs.eclipse.org/bugs/show_bug.cgi?id=64299
*/
org.eclipse.jdt.internal.core.util.Util.log(
e, "Could not retrieve declaring class"); // $NON-NLS-1$
}
}
} else if (this.binding.isTypeVariable()) {
TypeVariableBinding typeVariableBinding = (TypeVariableBinding) this.binding;
Binding declaringElement =
typeVariableBinding.isCapture()
? ((CaptureBinding) typeVariableBinding).sourceType
: typeVariableBinding.declaringElement;
if (declaringElement instanceof ReferenceBinding) {
try {
return this.resolver.getTypeBinding((ReferenceBinding) declaringElement);
} catch (RuntimeException e) {
/* in case a method cannot be resolvable due to missing jars on the classpath
* see https://bugs.eclipse.org/bugs/show_bug.cgi?id=57871
* https://bugs.eclipse.org/bugs/show_bug.cgi?id=63550
* https://bugs.eclipse.org/bugs/show_bug.cgi?id=64299
*/
org.eclipse.jdt.internal.core.util.Util.log(
e, "Could not retrieve declaring class"); // $NON-NLS-1$
}
}
}
return null;
}