/**
* Returns whether the given type has API visibility.
*
* @param type type
* @return whether the given type has API visibility
*/
private boolean isAPIType(IApiType type) throws CoreException {
IApiDescription description = type.getApiComponent().getApiDescription();
IApiAnnotations annotations = description.resolveAnnotations(type.getHandle());
if (annotations == null) {
// top level non-public top can have no annotations - they are not
// API
return false;
}
return VisibilityModifiers.isAPI(annotations.getVisibility());
}
/*
* (non-Javadoc)
* @see
* org.eclipse.pde.api.tools.internal.search.AbstractTypeLeakDetector#isProblem
* (org.eclipse.pde.api.tools.internal.provisional.model.IReference)
*/
@Override
public boolean isProblem(IReference reference) {
if (super.isProblem(reference)) {
// check the use restrictions on the API type (can be extended or
// not)
IApiType type = (IApiType) reference.getMember();
IApiComponent component = type.getApiComponent();
try {
if (type.isClass()) {
int modifiers = 0;
IApiAnnotations annotations =
component.getApiDescription().resolveAnnotations(type.getHandle());
if (annotations != null) {
// if annotations are null, the reference should not
// have been retained
// as it indicates a reference from a top level non
// public type
if (RestrictionModifiers.isExtendRestriction(annotations.getRestrictions())) {
// The no extend restriction means only public
// members can be seen
modifiers = Flags.AccPublic;
} else {
if (Flags.isFinal(type.getModifiers())) {
// if final then only public members can be seen
modifiers = Flags.AccPublic;
} else {
// public and protected members can be seen
modifiers = Flags.AccPublic | Flags.AccProtected;
}
}
IApiType nonApiSuper = type.getSuperclass();
// collect all visible methods in non-API types
Set<MethodKey> methods = new HashSet<MethodKey>();
while (!isAPIType(nonApiSuper)) {
if (hasVisibleField(nonApiSuper, modifiers)) {
// a visible field in a non-API type is a
// definite leak
return true;
}
gatherVisibleMethods(nonApiSuper, methods, modifiers);
nonApiSuper = nonApiSuper.getSuperclass();
}
if (methods.size() > 0) {
// check if the visible members are part of an API
// interface/class
List<IApiType> apiTypes = new LinkedList<IApiType>();
apiTypes.add(type);
gatherAPISuperTypes(apiTypes, type);
for (IApiType t2 : apiTypes) {
Set<MethodKey> apiMembers = new HashSet<MethodKey>();
gatherVisibleMethods(t2, apiMembers, modifiers);
methods.removeAll(apiMembers);
if (methods.size() == 0) {
// there are no visible methods left that
// are not part of an API type/interface
return false;
}
}
if (methods.size() > 0) {
// there are visible members that are not part
// of an API type/interface
return true;
}
}
}
} else {
// don't process interfaces, enums, annotations
return true;
}
} catch (CoreException ce) {
if (ApiPlugin.DEBUG_PROBLEM_DETECTOR) {
ApiPlugin.log(ce);
}
return true;
}
}
return false;
}