Class to load random data for the Roo demo

Loader.java

package com.springsource.petclinic;

import com.springsource.petclinic.domain.Owner;
import com.springsource.petclinic.domain.Pet;
import com.springsource.petclinic.domain.Vet;
import com.springsource.petclinic.domain.Visit;
import com.springsource.petclinic.reference.PetType;
import com.springsource.petclinic.reference.Specialty;
import org.springframework.context.ApplicationListener;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.*;


@Component
public class Loader implements ApplicationListener<ContextRefreshedEvent>{

    @Override
    @Transactional
    public void onApplicationEvent(ContextRefreshedEvent event) {
        if (event.getApplicationContext().getParent() == null) {
            System.out.println(">>>>>>>>  Parent started");
            System.out.println("before: " + Owner.countOwners());

            Vet vet = null;
            Random generator = new Random();

            for (int i = 0; i < 20; i++) {

                if (i % 3 == 0) {
                    vet = new Vet();
                    vet.setLastName(UUID.randomUUID().toString().substring(0, 10));
                    vet.setFirstName(UUID.randomUUID().toString().substring(0, 10));
                    vet.setEmail("q@q.com");
                    vet.setBirthDay(new Date());
                    vet.setAddress("aqqqqqq");
                    vet.setCity("aqqqqqq");
                    vet.setTelephone("00000000");
                    vet.setHomePage("http://www.jeremi.info");

                    GregorianCalendar employedSince = new GregorianCalendar();
                    employedSince.set(2009, 10, 21);

                    vet.setEmployedSince(employedSince);

                    int randomInt = (Math.abs(generator.nextInt()) % 3);
                    if (randomInt == 1) {
                        vet.setSpecialty(Specialty.Cardiology);
                    } else if (randomInt == 2) {
                        vet.setSpecialty(Specialty.Nutrition);
                    } else {
                        vet.setSpecialty(Specialty.Dentistry);
                    }

                    vet.persist();
                }

                Owner owner = new Owner();
                owner.setLastName(UUID.randomUUID().toString().substring(0, 10));
                owner.setFirstName(UUID.randomUUID().toString().substring(0, 10));
                owner.setEmail("q@q.com");
                owner.setBirthDay(new Date());
                owner.setAddress("aqqqqqq");

                int randomInt = (Math.abs(generator.nextInt()) % 3);

                if (randomInt == 1) {
                    owner.setCity("Paris");
                } else if (randomInt == 2) {
                    owner.setCity("Montreuil");
                } else {
                    owner.setCity("Boulogne");
                }

                owner.setTelephone("00000000");
                owner.setHomePage("http://www.jeremi.info");
                owner.persist();

                Pet pet = new Pet();
                pet.setName(UUID.randomUUID().toString());
                pet.setOwner(owner);
                pet.setType(PetType.Bird);
                pet.setWeight(new Float(42.1));
                pet.persist();

                for (int j = 0; j < 3; j++) {

                    Visit visit = new Visit();
                    visit.setDescription(UUID.randomUUID().toString());
                    visit.setPet(pet);
                    visit.setVet(vet);

                    Calendar cal = Calendar.getInstance();

                    cal.add(Calendar.DATE, -(Math.abs(generator.nextInt()) % 31) - 1);

                    visit.setVisitDate(cal.getTime());

                    visit.persist();
                }
            }


            System.out.println("after: " + Owner.countOwners());
        } else {
            System.out.println(">>>>>>>>  Child started; ignoring");
        }
    }
}