Java tutorial
//package com.java2s; /******************************************************************************* * Copyright 2012-2013 Trento RISE * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. ******************************************************************************/ import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Set; public class Main { private static Map<String, String> categoryMapping = new HashMap<String, String>(); public static String[] getAllCategories(Set<String> set) { List<String> result = new ArrayList<String>(); for (String key : categoryMapping.keySet()) { if (set.contains(categoryMapping.get(key))) { // if (key.equals(EVENT_NONCATEGORIZED) || // key.equals(POI_NONCATEGORIZED) || // key.equals(STORY_NONCATEGORIZED)) { // // result.add(null); // } result.add(key); // set.remove(categoryMapping.get(key)); } } return result.toArray(new String[result.size()]); } }