DataTable Filter

@Named("dtFilterView")
@ViewScoped
public class FilterView implements Serializable {

    @Inject
    private CustomerService service;

    private List<Customer> customers1;

    private List<Customer> customers2;

    private List<Customer> customers3;

    private List<Customer> filteredCustomers1;

    private List<Customer> filteredCustomers2;

    private List<Customer> filteredCustomers3;

    private List<FilterMeta> filterBy;

    private boolean globalFilterOnly;

    @PostConstruct
    public void init() {
        globalFilterOnly = false;
        customers1 = service.getCustomers(10);
        customers2 = service.getCustomers(50);
        customers3 = service.getCustomers(10);

        filterBy = new ArrayList<>();

        filterBy.add(FilterMeta.builder()
                .field("status")
                .filterValue(CustomerStatus.NEW)
                .matchMode(MatchMode.EQUALS)
                .build());

        filterBy.add(FilterMeta.builder()
                .field("date")
                .filterValue(new ArrayList<>(Arrays.asList(LocalDate.now().minusDays(28), LocalDate.now().plusDays(28))))
                .matchMode(MatchMode.BETWEEN)
                .build());

    }

    public boolean globalFilterFunction(Object value, Object filter, Locale locale) {
        String filterText = (filter == null) ? null : filter.toString().trim().toLowerCase();
        if (LangUtils.isBlank(filterText)) {
            return true;
        }
        int filterInt = getInteger(filterText);

        Customer customer = (Customer) value;
        return customer.getName().toLowerCase().contains(filterText)
                || customer.getCountry().getName().toLowerCase().contains(filterText)
                || customer.getRepresentative().getName().toLowerCase().contains(filterText)
                || customer.getDate().toString().toLowerCase().contains(filterText)
                || customer.getStatus().name().toLowerCase().contains(filterText)
                || customer.getActivity() < filterInt;
    }

    public void toggleGlobalFilter() {
        setGlobalFilterOnly(!isGlobalFilterOnly());
    }

    private int getInteger(String string) {
        try {
            return Integer.parseInt(string);
        }
        catch (NumberFormatException ex) {
            return 0;
        }
    }

    public List<Representative> getRepresentatives() {
        return service.getRepresentatives();
    }

    public CustomerStatus[] getCustomerStatus() {
        return service.getCustomerStatus();
    }

    public List<Customer> getCustomers1() {
        return customers1;
    }

    public List<Customer> getCustomers2() {
        return customers2;
    }

    public List<Customer> getCustomers3() {
        return customers3;
    }

    public List<Customer> getFilteredCustomers1() {
        return filteredCustomers1;
    }

    public void setFilteredCustomers1(List<Customer> filteredCustomers1) {
        this.filteredCustomers1 = filteredCustomers1;
    }

    public List<Customer> getFilteredCustomers2() {
        return filteredCustomers2;
    }

    public void setFilteredCustomers2(List<Customer> filteredCustomers2) {
        this.filteredCustomers2 = filteredCustomers2;
    }

    public List<Customer> getFilteredCustomers3() {
        return filteredCustomers3;
    }

    public void setFilteredCustomers3(List<Customer> filteredCustomers3) {
        this.filteredCustomers3 = filteredCustomers3;
    }

    public void setService(CustomerService service) {
        this.service = service;
    }

    public List<FilterMeta> getFilterBy() {
        return filterBy;
    }

    public boolean isGlobalFilterOnly() {
        return globalFilterOnly;
    }

    public void setGlobalFilterOnly(boolean globalFilterOnly) {
        this.globalFilterOnly = globalFilterOnly;
    }
}

@Named
@ApplicationScoped
public class CustomerService {

    private Random random = new SecureRandom();
    private Country[] countries;
    private Representative[] representatives;
    private String[] firstNames;
    private String[] lastNames;
    private String[] companies;

    @PostConstruct
    public void init() {
        countries = new Country[]{
            new Country(0, "Argentina", "ar"),
            new Country(1, "Australia", "au"),
            new Country(2, "Brazil", "br"),
            new Country(3, "Canada", "ca"),
            new Country(4, "Germany", "de"),
            new Country(5, "France", "fr"),
            new Country(6, "India", "in"),
            new Country(7, "Italy", "it"),
            new Country(8, "Japan", "jp"),
            new Country(9, "Russia", "ru"),
            new Country(10, "Spain", "es"),
            new Country(11, "United Kingdom", "gb")};

        companies = new String[]{"Benton, John B Jr", "Chanay, Jeffrey A Esq", "Chemel, James L Cpa", "Feltz Printing Service",
            "Printing Dimensions", "Chapman, Ross E Esq", "Morlong Associates", "Commercial Press", "Truhlar And Truhlar Attys",
            "King, Christopher A Esq", "Dorl, James J Esq", "Rangoni Of Florence", "Feiner Bros", "Buckley Miller Wright",
            "Rousseaux, Michael Esq"};

        representatives = new Representative[]{
            new Representative("Amy Elsner", "amyelsner.png"),
            new Representative("Anna Fali", "annafali.png"),
            new Representative("Asiya Javayant", "asiyajavayant.png"),
            new Representative("Bernardo Dominic", "bernardodominic.png"),
            new Representative("Elwin Sharvill", "elwinsharvill.png"),
            new Representative("Ioni Bowcher", "ionibowcher.png"),
            new Representative("Ivan Magalhaes", "ivanmagalhaes.png"),
            new Representative("Onyama Limba", "onyamalimba.png"),
            new Representative("Stephen Shaw", "stephenshaw.png"),
            new Representative("Xuxue Feng", "xuxuefeng.png")};

        firstNames = new String[]{"James", "David", "Jeanfrancois", "Ivar", "Tony",
            "Adams", "Claire", "Costa", "Juan", "Maria", "Jennifer",
            "Stacey", "Leja", "Morrow", "Arvin", "Darci", "Izzy",
            "Ricardo", "Clifford", "Emily", "Kadeem", "Mujtaba", "Aika",
            "Mayumi", "Misaki", "Silvio", "Nicolas", "Antonio",
            "Deepesh", "Aditya", "Aruna", "Jones", "Julie", "Smith",
            "Johnson", "Francesco", "Salvatore", "Kaitlin", "Faith",
            "Maisha", "Jefferson", "Leon", "Rodrigues", "Alejandro",
            "Munro", "Cody", "Chavez", "Sinclair", "Isabel", "Octavia",
            "Murillo", "Greenwood", "Wickens", "Ashley"};
        lastNames = new String[]{"Butt", "Darakjy", "Venere", "Paprocki", "Foller",
            "Morasca", "Tollner", "Dilliard", "Wieser", "Marrier", "Amigon",
            "Maclead", "Caldarera", "Ruta", "Albares", "Poquette", "Garufi",
            "Gaucho", "Rim", "Whobrey", "Flosi", "Nicka", "Inouye",
            "Kolmetz", "Royster", "Slusarski", "Iturbide", "Caudy",
            "Chui", "Kusko", "Figeroa", "Vocelka", "Stenseth", "Glick",
            "Sergi", "Shinko", "Stockham", "Ostrosky", "Gillian",
            "Rulapaugh", "Schemmer", "Oldroyd", "Campain", "Perin",
            "Ferencz", "Saylors", "Briddick", "Waycott", "Bowley", "Malet",
            "Malet", "Bolognia", "Nestle", "Doe"};
    }

    public List<Customer> getCustomers(int number) {
        List<Customer> customers = new ArrayList<>();
        for (int i = 0; i < number; i++) {
            customers.add(
                    new Customer(i + 1000, getName(), getCompany(), getCountry(), getDate(),
                            CustomerStatus.random(), getActivity(), getRepresentative()));
        }
        return customers;
    }

    public List<Country> getCountries() {
        return Arrays.asList(countries);
    }

    public CustomerStatus[] getCustomerStatus() {
        return CustomerStatus.values();
    }

    public List<Representative> getRepresentatives() {
        return Arrays.asList(representatives);
    }

    private String getName() {
        return firstNames[random.nextInt(firstNames.length)] + Constants.SPACE
                + (char) (random.nextInt(26) + 'A') + Constants.SPACE
                + lastNames[random.nextInt(lastNames.length)];
    }

    private Country getCountry() {
        return countries[random.nextInt(countries.length)];
    }

    private String getCompany() {
        return companies[random.nextInt(companies.length)];
    }

    private LocalDate getDate() {
        LocalDate now = LocalDate.now();
        long randomDay = ThreadLocalRandom.current().nextLong(now.minusDays(30).toEpochDay(), now.toEpochDay());
        return LocalDate.ofEpochDay(randomDay);
    }

    private int getActivity() {
        return random.nextInt(100);
    }

    private Representative getRepresentative() {
        return representatives[random.nextInt(representatives.length)];
    }
}

public class Customer implements Serializable {

    private static final long serialVersionUID = 1L;

    private int id;
    private String name;
    private String company;
    private Country country;
    private LocalDate date;
    private CustomerStatus status;
    private int activity;
    private Representative representative;

    public Customer() {
    }

    public Customer(int id, String name, String company, Country country, LocalDate date, CustomerStatus status, int activity,
                Representative representative) {
        this.id = id;
        this.name = name;
        this.company = company;
        this.country = country;
        this.date = date;
        this.status = status;
        this.activity = activity;
        this.representative = representative;
    }

    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 getCompany() {
        return company;
    }

    public void setCompany(String company) {
        this.company = company;
    }

    public Country getCountry() {
        return country;
    }

    public void setCountry(Country country) {
        this.country = country;
    }

    public LocalDate getDate() {
        return date;
    }

    public void setDate(LocalDate date) {
        this.date = date;
    }

    public CustomerStatus getStatus() {
        return status;
    }

    public void setStatus(CustomerStatus status) {
        this.status = status;
    }

    public int getActivity() {
        return activity;
    }

    public void setActivity(int activity) {
        this.activity = activity;
    }

    public Representative getRepresentative() {
        return representative;
    }

    public void setRepresentative(Representative representative) {
        this.representative = representative;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        Customer customer = (Customer) o;
        return id == customer.id
                    && activity == customer.activity
                    && Objects.equals(name, customer.name)
                    && Objects.equals(company, customer.company)
                    && Objects.equals(country, customer.country)
                    && Objects.equals(date, customer.date)
                    && status == customer.status
                    && Objects.equals(representative, customer.representative);
    }

    @Override
    public int hashCode() {
        return Objects.hash(id, name, company, country, date, status, activity, representative);
    }
}

public class Country implements Serializable, Comparable<Country> {

    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);
    }

}

public enum CustomerStatus {
    QUALIFIED,
    UNQUALIFIED,
    NEGOTIATION,
    NEW,
    RENEWAL,
    PROPOSAL;

    public static CustomerStatus random() {
        Random random = new Random();
        return values()[random.nextInt(values().length)];
    }
}

public class Representative implements Serializable, Comparable<Representative> {

    private static final long serialVersionUID = 1L;

    private String name;
    private String image;

    public Representative() {
    }

    public Representative(String name, String image) {
        this.name = name;
        this.image = image;
    }

    public String getName() {
        return name;
    }

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

    public String getImage() {
        return image;
    }

    public void setImage(String image) {
        this.image = image;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        Representative that = (Representative) o;
        return Objects.equals(name, that.name)
                && Objects.equals(image, that.image);
    }

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

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

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