@Override
public void merge(WebFragment webFragment, WebApp webApp, MergeContext mergeContext) throws DeploymentException {
for (Filter srcFilter : webFragment.getFilter()) {
String filterName = srcFilter.getFilterName();
Filter targetFilter = (Filter) mergeContext.getAttribute(createFilterKey(filterName));
if (targetFilter == null) {
webApp.getFilter().add(srcFilter);
mergeContext.setAttribute(createFilterKey(filterName), srcFilter);
for (SubMergeHandler<Filter, Filter> subMergeHandler : subMergeHandlers) {
subMergeHandler.add(srcFilter, mergeContext);