Question

我目前正致力于基于JDT的自定义重构工具。有一次，我想找到一个类型的所有子类型，就像eclipse中的“类型层次结构”视图一样。我使用SearchEngine编写了一个通过hierarchie进行的recursiv函数。这可行，但对于深层次结构来说真的很慢。我可以使用更高效的API吗？

private Set<IType> searchForSubTypesOf(IType type, IProgressMonitor monitor) throws CoreException {
    final Set<IType> result = new HashSet<IType>();

    SearchPattern pattern = SearchPattern.createPattern(type, IJavaSearchConstants.REFERENCES, SearchPattern.R_EXACT_MATCH);
    SearchParticipant[] participants = new SearchParticipant[] { SearchEngine.getDefaultSearchParticipant() };
    IJavaSearchScope scope = SearchEngine.createHierarchyScope(inputType);
    SearchRequestor requestor = new SearchRequestor() {
        @Override
        public void acceptSearchMatch(SearchMatch match) throws CoreException {
            if (match.getAccuracy() == SearchMatch.A_ACCURATE && match.getElement() instanceof IType) {
                IType subType = (IType)match.getElement();
                result.add(subType);
                // Recursive search for the type found
                Set<IType> subTypes = searchForSubTypesOf(subType, new NullProgressMonitor());
                result.addAll(subTypes);
            }
        }
    };

    new SearchEngine().search(pattern, participants, scope, requestor, monitor);
    return result;
}

Answer 1

经过大量的代码阅读，我有一个很棒的时刻，我终于找到了我想要的API！

我的上述功能归结为：

public static IType[] getAllSubtypesOf(IType type, IProgressMonitor monitor) throws CoreException {
    return type.newTypeHierarchy(monitor).getAllSubtypes(type);
}

如何有效地查找IType的所有子类型

1 个答案: