import java.util.HashMap;
import javax.jws.WebMethod;
import javax.jws.WebService;


@WebService()
public class PersonsLimit {
    private HashMap<String, Integer> hmap = new HashMap<String, Integer>();

    public PersonsLimit() {
        this.hmap.put("IEM", 2000);
        this.hmap.put("ImagineCup", 0);
    }

    @WebMethod()
    public boolean VerifyLimit(String competitonname) throws Exception {
        if(!this.hmap.containsKey(competitonname)) {
            return false;
        }

        Integer limit = this.hmap.get(competitonname);
        this.hmap.put(competitonname, --limit);

        return true;
    }

    @WebMethod()
    public boolean Compensate(String competitonname) {
        Integer limit = this.hmap.get(competitonname);
        this.hmap.put(competitonname, ++limit);

        return false;
    }
}


import javax.jws.WebMethod;
import javax.jws.WebService;


@WebService()
public class NotifyOrganizers {

    @WebMethod()
    public boolean notify(String firstname, String lastname, String competitionname) throws Exception {
        System.out.println(firstname + " " + lastname + " registered for: " + competitionname);
        return true;
    }
}




public class Person {
    private String firstname;
    private String lastname;

    public Person(String firstname, String lastname) {
        this.firstname = firstname;
        this.lastname = lastname;
    }

    public boolean compareTo(String firstname, String lastname) {
        if(firstname == this.firstname &&
           lastname == this.lastname) {
               return true;
           }
        return false;
    }

    public String getFirstname() {
        return this.firstname;
    }

    public String getLastname() {
        return this.lastname;
    }
}




import javax.jws.WebMethod;
import javax.jws.WebService;
import java.util.List;
import java.util.ArrayList;

import verifybannedpersons.Person;


@WebService()
public class VerifyBannedPersons {

    private List<Person> bannedPersons = new ArrayList<Person>();

    public VerifyBannedPersons() {
        super();
        this.bannedPersons.add(new Person("Dawid", "Wojciechowski"));
    }

    @WebMethod()
    public boolean verify(String firstname, String lastname)  throws IllegalAccessException {
        for(int i = 0; i < this.bannedPersons.size(); i++) {
            Person person = this.bannedPersons.get(i);

            if(person.getFirstname().equals(firstname) &&
               person.getLastname().equals(lastname)) {
                   throw new IllegalAccessException("Person " + person.getFirstname() + " " + person.getLastname() + " is banned!");
               }
        }

        return true;
    }
}