public Set<String> getOperatorClasses(String parent, String searchTerm) throws ClassNotFoundException { if (CollectionUtils.isEmpty(operatorClassNames)) { loadOperatorClass(); } if (parent == null) { parent = Operator.class.getName(); } else { if (!typeGraph.isAncestor(Operator.class.getName(), parent)) { throw new IllegalArgumentException("Argument must be a subclass of Operator class"); } } Set<String> filteredClass = Sets.filter( operatorClassNames, new Predicate<String>() { @Override public boolean apply(String className) { OperatorClassInfo oci = classInfo.get(className); return oci == null || !oci.tags.containsKey("@omitFromUI"); } }); if (searchTerm == null && parent.equals(Operator.class.getName())) { return filteredClass; } if (searchTerm != null) { searchTerm = searchTerm.toLowerCase(); } Set<String> result = new HashSet<String>(); for (String clazz : filteredClass) { if (parent.equals(Operator.class.getName()) || typeGraph.isAncestor(parent, clazz)) { if (searchTerm == null) { result.add(clazz); } else { if (clazz.toLowerCase().contains(searchTerm)) { result.add(clazz); } else { OperatorClassInfo oci = classInfo.get(clazz); if (oci != null) { if (oci.comment != null && oci.comment.toLowerCase().contains(searchTerm)) { result.add(clazz); } else { for (Map.Entry<String, String> entry : oci.tags.entrySet()) { if (entry.getValue().toLowerCase().contains(searchTerm)) { result.add(clazz); break; } } } } } } } } return result; }