public IJavaElement getElementAtConsideringSibling(int position) throws JavaModelException {
IPackageFragment fragment = (IPackageFragment) getParent();
PackageFragmentRoot root =
(PackageFragmentRoot) fragment.getAncestor(IJavaElement.PACKAGE_FRAGMENT_ROOT);
SourceMapper mapper = root.getSourceMapper();
if (mapper == null) {
return null;
} else {
int index = this.name.indexOf('$');
int prefixLength = index < 0 ? this.name.length() : index;
IType type = null;
int start = -1;
int end = Integer.MAX_VALUE;
IJavaElement[] children = fragment.getChildren();
for (int i = 0; i < children.length; i++) {
String childName = children[i].getElementName();
int childIndex = childName.indexOf('$');
int childPrefixLength = childIndex < 0 ? childName.indexOf('.') : childIndex;
if (prefixLength == childPrefixLength
&& this.name.regionMatches(0, childName, 0, prefixLength)) {
IClassFile classFile = (IClassFile) children[i];
// ensure this class file's buffer is open so that source ranges are computed
classFile.getBuffer();
SourceRange range = mapper.getSourceRange(classFile.getType());
if (range == SourceMapper.UNKNOWN_RANGE) continue;
int newStart = range.getOffset();
int newEnd = newStart + range.getLength() - 1;
if (newStart > start && newEnd < end && newStart <= position && newEnd >= position) {
type = classFile.getType();
start = newStart;
end = newEnd;
}
}
}
if (type != null) {
return findElement(type, position, mapper);
}
return null;
}
}
/**
* Finds the deepest <code>IJavaElement</code> in the hierarchy of
* <code>elt</elt>'s children (including <code>elt</code> itself)
* which has a source range that encloses <code>position</code>
* according to <code>mapper</code>.
*/
protected IJavaElement findElement(IJavaElement elt, int position, SourceMapper mapper) {
SourceRange range = mapper.getSourceRange(elt);
if (range == null
|| position < range.getOffset()
|| range.getOffset() + range.getLength() - 1 < position) {
return null;
}
if (elt instanceof IParent) {
try {
IJavaElement[] children = ((IParent) elt).getChildren();
for (int i = 0; i < children.length; i++) {
IJavaElement match = findElement(children[i], position, mapper);
if (match != null) {
return match;
}
}
} catch (JavaModelException npe) {
// elt doesn't exist: return the element
}
}
return elt;
}