gaspersic/java-design-patterns
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Inclusion of log4j dependency rather than relying on

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System.out.println() statements.
Added unit tests for doa module.
This commit is contained in:
Alan
2015-09-05 21:54:14 +01:00
parent 5956873fc9
commit 3da48d970c
10 changed files with 282 additions and 96 deletions
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47
dao/src/main/java/com/iluwatar/dao/App.java
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@@ -3,6 +3,8 @@ package com.iluwatar.dao;
import java.util.ArrayList;
import java.util.List;
import org.apache.log4j.Logger;
/**
*
* With the DAO pattern, we can use various method calls to retrieve/add/delete/update data without directly
@@ -11,43 +13,38 @@ import java.util.List;
*/
public class App {
private static Logger LOGGER = Logger.getLogger(App.class);
/**
* Program entry point
* @param args command line args
* Program entry point.
*
* @param args command line args.
*/
public static void main(String[] args) {
CustomerDaoImpl customerDao = new CustomerDaoImpl(generateSampleCustomers());
System.out.println("customerDao.getAllCustomers(): " + customerDao.getAllCustomers());
System.out.println("customerDao.getCusterById(2): " + customerDao.getCusterById(2));
Customer customer = new Customer(4, "Dan", "Danson");
public static void main(final String[] args) {
final CustomerDaoImpl customerDao = new CustomerDaoImpl(generateSampleCustomers());
LOGGER.info("customerDao.getAllCustomers(): " + customerDao.getAllCustomers());
LOGGER.info("customerDao.getCusterById(2): " + customerDao.getCustomerById(2));
final Customer customer = new Customer(4, "Dan", "Danson");
customerDao.addCustomer(customer);
System.out.println("customerDao.getAllCustomers(): " + customerDao.getAllCustomers());
LOGGER.info("customerDao.getAllCustomers(): " + customerDao.getAllCustomers());
customer.setFirstName("Daniel");
customer.setLastName("Danielson");
customerDao.updateCustomer(customer);
System.out.println("customerDao.getAllCustomers(): " + customerDao.getAllCustomers());
LOGGER.info("customerDao.getAllCustomers(): " + customerDao.getAllCustomers());
customerDao.deleteCustomer(customer);
System.out.println("customerDao.getAllCustomers(): " + customerDao.getAllCustomers());
LOGGER.info("customerDao.getAllCustomers(): " + customerDao.getAllCustomers());
}
/**
* Generate customers
* @return list of customers
* Generate customers.
*
* @return list of customers.
*/
public static List<Customer> generateSampleCustomers() {
Customer customer1 = new Customer(1, "Adam", "Adamson");
Customer customer2 = new Customer(2, "Bob", "Bobson");
Customer customer3 = new Customer(3, "Carl", "Carlson");
List<Customer> customers = new ArrayList<Customer>();
final Customer customer1 = new Customer(1, "Adam", "Adamson");
final Customer customer2 = new Customer(2, "Bob", "Bobson");
final Customer customer3 = new Customer(3, "Carl", "Carlson");
final List<Customer> customers = new ArrayList<Customer>();
customers.add(customer1);
customers.add(customer2);
customers.add(customer3);

41
dao/src/main/java/com/iluwatar/dao/Customer.java
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@@ -11,7 +11,7 @@ public class Customer {
private String firstName;
private String lastName;
public Customer(int id, String firstName, String lastName) {
public Customer(final int id, final String firstName, final String lastName) {
this.id = id;
this.firstName = firstName;
this.lastName = lastName;
@@ -21,7 +21,7 @@ public class Customer {
return id;
}
public void setId(int id) {
public void setId(final int id) {
this.id = id;
}
@@ -29,7 +29,7 @@ public class Customer {
return firstName;
}
public void setFirstName(String firstName) {
public void setFirstName(final String firstName) {
this.firstName = firstName;
}
@@ -37,34 +37,39 @@ public class Customer {
return lastName;
}
public void setLastName(String lastName) {
public void setLastName(final String lastName) {
this.lastName = lastName;
}
@Override
public String toString() {
return "Customer{" +
"id=" + id +
", firstName='" + firstName + '\'' +
", lastName='" + lastName + '\'' +
"id=" + getId() +
", firstName='" + getFirstName() + '\'' +
", lastName='" + getLastName() + '\'' +
'}';
}
/**
* Checks if two objects are the same.
*
* @return true if the two objects are Customer objects and have the same id value, false otherwise.
*/
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Customer customer = (Customer) o;
if (id != customer.id) return false;
return true;
public boolean equals(final Object o) {
boolean isEqual = false;
final Customer customer = (Customer) o;
if (getId() == customer.getId()) {
isEqual = true;
}
return isEqual;
}
@Override
public int hashCode() {
int result = id;
int result = getId();
id += getFirstName().hashCode();
id += getLastName().hashCode();
return result;
}
}

10
dao/src/main/java/com/iluwatar/dao/CustomerDao.java
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@@ -9,9 +9,9 @@ import java.util.List;
*/
public interface CustomerDao {
public List<Customer> getAllCustomers();
public Customer getCusterById(int id);
public void addCustomer(Customer customer);
public void updateCustomer(Customer customer);
public void deleteCustomer(Customer customer);
List<Customer> getAllCustomers();
Customer getCustomerById(final int id);
void addCustomer(final Customer customer);
void updateCustomer(final Customer customer);
void deleteCustomer(final Customer customer);
}

28
dao/src/main/java/com/iluwatar/dao/CustomerDaoImpl.java
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@@ -17,7 +17,7 @@ public class CustomerDaoImpl implements CustomerDao {
// Note: Normally this would be in the form of an actual database and not part of the Dao Impl.
private List<Customer> customers;
public CustomerDaoImpl(List<Customer> customers) {
public CustomerDaoImpl(final List<Customer> customers) {
this.customers = customers;
}
@@ -27,31 +27,33 @@ public class CustomerDaoImpl implements CustomerDao {
}
@Override
public Customer getCusterById(int id) {
for (int i = 0; i < customers.size(); i++) {
if (customers.get(i).getId() == id) {
return customers.get(i);
public Customer getCustomerById(final int id) {
Customer customer = null;
for (final Customer cus : getAllCustomers()) {
if (cus.getId() == id) {
customer = cus;
break;
}
}
// No customer found
return null;
return customer;
}
@Override
public void addCustomer(Customer customer) {
public void addCustomer(final Customer customer) {
customers.add(customer);
}
@Override
public void updateCustomer(Customer customer) {
if (customers.contains(customer)) {
customers.set(customers.indexOf(customer), customer);
public void updateCustomer(final Customer customer) {
if (getAllCustomers().contains(customer)) {
final int index = getAllCustomers().indexOf(customer);
getAllCustomers().set(index, customer);
}
}
@Override
public void deleteCustomer(Customer customer) {
customers.remove(customer);
public void deleteCustomer(final Customer customer) {
getAllCustomers().remove(customer);
}
}