KeyFilter

@Named
@RequestScoped
public class AutoCompleteView {
    
    private String txt1;
    private String txt2;
    private String txt3;
    private String txt4;
    private String txt5;
    private String txt6;
    private String txt7;
    private String txt8;
    private String txt9;
    private Country country1;
    private Country country2;
    private Country country3;
    private Country country4;
    private Country country5;
    private List<Country> selectedCountries;

    @Inject
    private CountryService countryService;

    public List<String> completeText(String query) {
        String queryLowerCase = query.toLowerCase();
        List<String> countryList = new ArrayList<>();
        List<Country> countries = countryService.getCountries();
        for (Country country : countries) {
            countryList.add(country.getName());
        }

        return countryList.stream().filter(t -> t.toLowerCase().startsWith(queryLowerCase)).collect(Collectors.toList());
    }
    public List<String> noResults(String query) {
        return Collections.EMPTY_LIST;
    }

    public List<Country> completeCountry(String query) {
        String queryLowerCase = query.toLowerCase();
        List<Country> countries = countryService.getCountries();
        return countries.stream().filter(t -> t.getName().toLowerCase().contains(queryLowerCase)).collect(Collectors.toList());
    }

    public void onItemSelect(SelectEvent<String> event) {
        FacesContext.getCurrentInstance().addMessage(null, new FacesMessage("Country Selected", event.getObject()));
    }

    public void onEmptyMessageSelect() {
        FacesContext.getCurrentInstance().addMessage(null, new FacesMessage("Empty message selected"));
    }

    public String getTxt1() {
        return txt1;
    }

    public void setTxt1(String txt1) {
        this.txt1 = txt1;
    }

    public String getTxt2() {
        return txt2;
    }

    public void setTxt2(String txt2) {
        this.txt2 = txt2;
    }

    public String getTxt3() {
        return txt3;
    }

    public void setTxt3(String txt3) {
        this.txt3 = txt3;
    }

    public String getTxt4() {
        return txt4;
    }

    public void setTxt4(String txt4) {
        this.txt4 = txt4;
    }

    public String getTxt5() {
        return txt5;
    }

    public void setTxt5(String txt5) {
        this.txt5 = txt5;
    }

    public String getTxt6() {
        return txt6;
    }

    public void setTxt6(String txt6) {
        this.txt6 = txt6;
    }

    public String getTxt7() {
        return txt7;
    }

    public void setTxt7(String txt7) {
        this.txt7 = txt7;
    }

    public String getTxt8() {
        return txt8;
    }

    public void setTxt8(String txt8) {
        this.txt8 = txt8;
    }

    public String getTxt9() {
        return txt9;
    }

    public void setTxt9(String txt9) {
        this.txt9 = txt9;
    }

    public Country getCountry1() {
        return country1;
    }

    public void setCountry1(Country country1) {
        this.country1 = country1;
    }

    public Country getCountry2() {
        return country2;
    }

    public void setCountry2(Country country2) {
        this.country2 = country2;
    }

    public Country getCountry3() {
        return country3;
    }

    public void setCountry3(Country country3) {
        this.country3 = country3;
    }

    public Country getCountry4() {
        return country4;
    }

    public void setCountry4(Country country4) {
        this.country4 = country4;
    }

    public Country getCountry5() {
        return country5;
    }

    public void setCountry5(Country country5) {
        this.country5 = country5;
    }

    public List<Country> getSelectedCountries() {
        return selectedCountries;
    }

    public void setSelectedCountries(List<Country> selectedCountries) {
        this.selectedCountries = selectedCountries;
    }

    public void setCountryService(CountryService countryService) {
        this.countryService = countryService;
    }

    public char getCountryGroup(Country country) {
        return country.getName().charAt(0);
    }
}

public class Country implements Serializable, Comparable<Country> {
	
	private static final long serialVersionUID = 1L;
	
    private int id;
    private String name;
    private String code;
    private Locale locale;
    private boolean rtl;

    public Country() {}
    
    public Country(int id, Locale locale) {
    	this(id, locale.getDisplayCountry(), locale.getCountry().toLowerCase(), locale);
    }
    
    public Country(int id, Locale locale, boolean rtl) {
    	this(id, locale.getDisplayCountry(), locale.getCountry().toLowerCase(), locale);
    	this.rtl = rtl;
    }
   
    
    public Country(int id, String name, String code) {
    	this(id, name, code, null);
    }

    public Country(int id, String name, String code, Locale locale) {
        this.id = id;
        this.name = name;
        this.code = code;
        this.locale = locale;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }
    
	public Locale getLocale() {
		return locale;
	}

	public void setLocale(Locale locale) {
		this.locale = locale;
	}
	
	public String getLanguage( ) {
		return locale == null ? "en" : locale.getLanguage();
	}
	
	public String getDisplayLanguage( ) {
		return locale == null ? "English" : locale.getDisplayLanguage();
	}
	
	public boolean isRtl() {
		return rtl;
	}

	public void setRtl(boolean rtl) {
		this.rtl = rtl;
	}

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Country country = (Country) o;
        return id == country.id &&
                Objects.equals(name, country.name) &&
                Objects.equals(code, country.code);
    }

    @Override
    public int hashCode() {
        return Objects.hash(id, name, code);
    }

    @Override
    public String toString() {
        return name;
    }

    @Override
    public int compareTo(Country o) {
        return name.compareTo(o.name);
    }

}

@Named
@ApplicationScoped
public class CountryService {

    private List<Country> countries;
    private Map<Integer, Country> countriesAsMap;
    private List<Country> locales;
    private Map<Integer, Country> localesAsMap;

    @PostConstruct
    public void init() {
        countries = new ArrayList<>();
        locales = new ArrayList<>();

        String[] isoCodes = Locale.getISOCountries();

        for (int i = 0; i < isoCodes.length; i++) {
            Locale locale = new Locale("", isoCodes[i]);
            countries.add(new Country(i, locale));
        }

        Collections.sort(countries, (Country c1, Country c2) -> c1.getName().compareTo(c2.getName()));
        
        int i = 0;
        locales.add(new Country(i++, Locale.US));
        locales.add(new Country(i++, Locale.FRANCE));
        locales.add(new Country(i++, Locale.GERMANY));
        locales.add(new Country(i++, Locale.ITALY));
        locales.add(new Country(i++, new Locale("es", "ES")));
        locales.add(new Country(i++, new Locale("ca", "ES")));
        locales.add(new Country(i++, new Locale("nl", "NL")));
        locales.add(new Country(i++, new Locale("pt", "BR")));
        locales.add(new Country(i++, new Locale("pt", "PT")));
        locales.add(new Country(i++, new Locale("ar", "SA"), true));
        locales.add(new Country(i++, new Locale("cs", "CZ")));
        locales.add(new Country(i++, new Locale("el", "GR")));
        locales.add(new Country(i++, new Locale("fa", "IR"), true));
        locales.add(new Country(i++, new Locale("hi", "IN")));
        locales.add(new Country(i++, new Locale("in", "ID")));
        locales.add(new Country(i++, new Locale("hr", "HR")));
        locales.add(new Country(i++, new Locale("hu", "HU")));
        locales.add(new Country(i++, new Locale("iw", "IL"), true));
        locales.add(new Country(i++, new Locale("ka", "GE")));
        locales.add(new Country(i++, new Locale("lv", "LV")));
        locales.add(new Country(i++, new Locale("no", "NO")));
        locales.add(new Country(i++, new Locale("pl", "PL")));
        locales.add(new Country(i++, new Locale("ro", "RO")));
        locales.add(new Country(i++, new Locale("ru", "RU")));
        locales.add(new Country(i++, new Locale("sk", "SK")));
        locales.add(new Country(i++, new Locale("sl", "SI")));
        locales.add(new Country(i++, new Locale("sr", "RS")));
        locales.add(new Country(i++, new Locale("sv", "SE")));
        locales.add(new Country(i++, new Locale("tr", "TR")));
        locales.add(new Country(i++, new Locale("uk", "UA")));
        locales.add(new Country(i++, new Locale("vi", "VN")));
        locales.add(new Country(i++, Locale.SIMPLIFIED_CHINESE));
        locales.add(new Country(i++, Locale.TRADITIONAL_CHINESE));
    }

    public List<Country> getCountries() {
        return new ArrayList<>(countries);
    }

    public Map<Integer, Country> getCountriesAsMap() {
        if (countriesAsMap == null) {
            countriesAsMap = getCountries().stream().collect(Collectors.toMap(Country::getId, country -> country));
        }
        return countriesAsMap;
    }
    
    public List<Country> getLocales() {
        return new ArrayList<>(locales);
    }
    
    public Map<Integer, Country> getLocalesAsMap() {
        if (localesAsMap == null) {
        	localesAsMap = getLocales().stream().collect(Collectors.toMap(Country::getId, country -> country));
        }
        return localesAsMap;
    }
}