Helper.java

/*
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 * Copyright (c) 2014-2015 Oracle and/or its affiliates. All rights reserved.
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 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * http://glassfish.java.net/public/CDDL+GPL_1_1.html
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package org.glassfish.jersey.examples.rx;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Random;

/**
 * @author Michal Gajdos
 */
public class Helper {

    public static void sleep() {
        sleep(500);
    }

    public static void sleep(final long millis) {
        try {
            Thread.sleep(millis);
        } catch (InterruptedException e) {
            // NOOP.
        }
    }

    public static List<String> getCountries(final int limit) {
        return getCountries(limit, Collections.<String>emptyList());
    }

    public static List<String> getCountries(final int limit, final List<String> exclusions) {
        final List<String> diff = new ArrayList<>(COUNTRIES);
        diff.removeAll(exclusions);

        if (limit >= diff.size()) {
            return new ArrayList<>(diff);
        } else {
            final List<String> countries = new ArrayList<>(limit);
            final Random random = new Random();

            for (int i = 0; i < limit; i++) {
                countries.add(diff.remove(random.nextInt(diff.size())));
            }

            return countries;
        }
    }

    public static String getForecast() {
        return WEATHER_CONDITIONS.get(new Random().nextInt(WEATHER_CONDITIONS.size()));
    }

    private static final List<String> COUNTRIES = Arrays.asList("Afghanistan",
            "Albania",
            "Algeria",
            "Andorra",
            "Angola",
            "Antigua & Barbuda",
            "Argentina",
            "Armenia",
            "Australia",
            "Austria",
            "Azerbaijan",
            "Bahamas",
            "Bahrain",
            "Bangladesh",
            "Barbados",
            "Belarus",
            "Belgium",
            "Belize",
            "Benin",
            "Bhutan",
            "Bolivia",
            "Bosnia & Herzegovina",
            "Botswana",
            "Brazil",
            "Brunei",
            "Bulgaria",
            "Burkina Faso",
            "Burundi",
            "Cambodia",
            "Cameroon",
            "Canada",
            "Cape Verde",
            "Central African Republic",
            "Chad",
            "Chile",
            "China",
            "Colombia",
            "Comoros",
            "Congo",
            "Congo Democratic Republic",
            "Costa Rica",
            "Cote d'Ivoire",
            "Croatia",
            "Cuba",
            "Cyprus",
            "Czech Republic",
            "Denmark",
            "Djibouti",
            "Dominica",
            "Dominican Republic",
            "Ecuador",
            "East Timor",
            "Egypt",
            "El Salvador",
            "Equatorial Guinea",
            "Eritrea",
            "Estonia",
            "Ethiopia",
            "Fiji",
            "Finland",
            "France",
            "Gabon",
            "Gambia",
            "Georgia",
            "Germany",
            "Ghana",
            "Greece",
            "Grenada",
            "Guatemala",
            "Guinea",
            "Guinea-Bissau",
            "Guyana",
            "Haiti",
            "Honduras",
            "Hungary",
            "Iceland",
            "India",
            "Indonesia",
            "Iran",
            "Iraq",
            "Ireland",
            "Israel",
            "Italy",
            "Jamaica",
            "Japan",
            "Jordan",
            "Kazakhstan",
            "Kenya",
            "Kiribati",
            "Korea North",
            "Korea South",
            "Kosovo",
            "Kuwait",
            "Kyrgyzstan",
            "Laos",
            "Latvia",
            "Lebanon",
            "Lesotho",
            "Liberia",
            "Libya",
            "Liechtenstein",
            "Lithuania",
            "Luxembourg",
            "Macedonia",
            "Madagascar",
            "Malawi",
            "Malaysia",
            "Maldives",
            "Mali",
            "Malta",
            "Marshall Islands",
            "Mauritania",
            "Mauritius",
            "Mexico",
            "Micronesia",
            "Moldova",
            "Monaco",
            "Mongolia",
            "Montenegro",
            "Morocco",
            "Mozambique",
            "Myanmar (Burma)",
            "Namibia",
            "Nauru",
            "Nepal",
            "The Netherlands",
            "New Zealand",
            "Nicaragua",
            "Niger",
            "Nigeria",
            "Norway",
            "Oman",
            "Pakistan",
            "Palau",
            "Palestinian State",
            "Panama",
            "Papua New Guinea",
            "Paraguay",
            "Peru",
            "The Philippines",
            "Poland",
            "Portugal",
            "Qatar",
            "Romania",
            "Russia",
            "Rwanda",
            "St. Kitts & Nevis",
            "St. Lucia",
            "St. Vincent & The Grenadines",
            "Samoa",
            "San Marino",
            "Sao Tome & Principe",
            "Saudi Arabia",
            "Senegal",
            "Serbia",
            "Seychelles",
            "Sierra Leone",
            "Singapore",
            "Slovakia",
            "Slovenia",
            "Solomon Islands",
            "Somalia",
            "South Africa",
            "South Sudan",
            "Spain",
            "Sri Lanka",
            "Sudan",
            "Suriname",
            "Swaziland",
            "Sweden",
            "Switzerland",
            "Syria",
            "Taiwan",
            "Tajikistan",
            "Tanzania",
            "Thailand",
            "Togo",
            "Tonga",
            "Trinidad & Tobago",
            "Tunisia",
            "Turkey",
            "Turkmenistan",
            "Tuvalu",
            "Uganda",
            "Ukraine",
            "United Arab Emirates",
            "United Kingdom",
            "United States of America",
            "Uruguay",
            "Uzbekistan",
            "Vanuatu",
            "Vatican City (Holy See)",
            "Venezuela",
            "Vietnam",
            "Yemen",
            "Zambia",
            "Zimbabwe");

    private static final List<String> WEATHER_CONDITIONS = Arrays.asList("Partly Sunny",
            "Scattered Thunderstorms",
            "Showers",
            "Scattered Showers",
            "Rain and Snow",
            "Overcast",
            "Light Snow",
            "Freezing Drizzle",
            "Chance of Rain",
            "Sunny",
            "Clear",
            "Mostly Sunny",
            "Partly Cloudy",
            "Mostly Cloudy",
            "Chance of Storm",
            "Rain",
            "Chance of Snow",
            "Cloudy",
            "Mist",
            "Storm",
            "Thunderstorm",
            "Chance of TStorm",
            "Sleet",
            "Snow",
            "Icy",
            "Dust",
            "Fog",
            "Smoke",
            "Haze",
            "Flurries",
            "Light Rain",
            "Snow Showers",
            "Hail");
}