diff --git a/guice/src/main/java/com/baeldung/examples/common/Account.java b/guice/src/main/java/com/baeldung/examples/common/Account.java new file mode 100644 index 0000000000..09a9d80b6a --- /dev/null +++ b/guice/src/main/java/com/baeldung/examples/common/Account.java @@ -0,0 +1,27 @@ +package com.baeldung.examples.common; + +import org.springframework.stereotype.Component; + +@Component +public class Account { + + private String accountNumber; + private String type; + + public String getAccountNumber() { + return accountNumber; + } + + public void setAccountNumber(String accountNumber) { + this.accountNumber = accountNumber; + } + + public String getType() { + return type; + } + + public void setType(String type) { + this.type = type; + } + +} diff --git a/guice/src/main/java/com/baeldung/examples/common/AccountService.java b/guice/src/main/java/com/baeldung/examples/common/AccountService.java new file mode 100644 index 0000000000..d6a7fe1d11 --- /dev/null +++ b/guice/src/main/java/com/baeldung/examples/common/AccountService.java @@ -0,0 +1,8 @@ +package com.baeldung.examples.common; + +import java.util.List; + +public interface AccountService { + public List listAccountTypes(); + +} diff --git a/guice/src/main/java/com/baeldung/examples/common/AccountServiceImpl.java b/guice/src/main/java/com/baeldung/examples/common/AccountServiceImpl.java new file mode 100644 index 0000000000..9cecf021fe --- /dev/null +++ b/guice/src/main/java/com/baeldung/examples/common/AccountServiceImpl.java @@ -0,0 +1,15 @@ +package com.baeldung.examples.common; + +import java.util.Arrays; +import java.util.List; + +import org.springframework.stereotype.Component; + +@Component +public class AccountServiceImpl implements AccountService { + + public List listAccountTypes() { + return Arrays.asList("Checking", "Saving"); + } + +} diff --git a/guice/src/main/java/com/baeldung/examples/common/Address.java b/guice/src/main/java/com/baeldung/examples/common/Address.java new file mode 100644 index 0000000000..3b07c47011 --- /dev/null +++ b/guice/src/main/java/com/baeldung/examples/common/Address.java @@ -0,0 +1,35 @@ +package com.baeldung.examples.common; + +import org.springframework.stereotype.Component; + +@Component +public class Address { + private String city; + private String state; + private String county; + + public String getCity() { + return city; + } + + public void setCity(String city) { + this.city = city; + } + + public String getState() { + return state; + } + + public void setState(String state) { + this.state = state; + } + + public String getCounty() { + return county; + } + + public void setCounty(String county) { + this.county = county; + } + +} diff --git a/guice/src/main/java/com/baeldung/examples/common/BookService.java b/guice/src/main/java/com/baeldung/examples/common/BookService.java new file mode 100644 index 0000000000..3aca9d90d7 --- /dev/null +++ b/guice/src/main/java/com/baeldung/examples/common/BookService.java @@ -0,0 +1,9 @@ +package com.baeldung.examples.common; + +import java.util.List; + +public interface BookService { + + public List findBestSellerBooks(); + +} diff --git a/guice/src/main/java/com/baeldung/examples/common/BookServiceImpl.java b/guice/src/main/java/com/baeldung/examples/common/BookServiceImpl.java new file mode 100644 index 0000000000..b5499c678d --- /dev/null +++ b/guice/src/main/java/com/baeldung/examples/common/BookServiceImpl.java @@ -0,0 +1,12 @@ +package com.baeldung.examples.common; + +import java.util.Arrays; +import java.util.List; + +public class BookServiceImpl implements BookService { + + public List findBestSellerBooks() { + return Arrays.asList("Harry Potter", "Lord of The Rings"); + } + +} diff --git a/guice/src/main/java/com/baeldung/examples/guice/Employee.java b/guice/src/main/java/com/baeldung/examples/guice/Employee.java new file mode 100644 index 0000000000..b85d251a05 --- /dev/null +++ b/guice/src/main/java/com/baeldung/examples/guice/Employee.java @@ -0,0 +1,32 @@ +package com.baeldung.examples.guice; + +import com.google.inject.Inject; + +public class Employee { + + private String firstName; + private String lastName; + + @Inject + public Employee(String firstName) { + this.firstName = firstName; + this.lastName = "Default"; + } + + public String getFirstName() { + return firstName; + } + + public void setFirstName(String firstName) { + this.firstName = firstName; + } + + public String getLastName() { + return lastName; + } + + public void setLastName(String lastName) { + this.lastName = lastName; + } + +} diff --git a/guice/src/main/java/com/baeldung/examples/guice/Foo.java b/guice/src/main/java/com/baeldung/examples/guice/Foo.java new file mode 100644 index 0000000000..a4f22a6f69 --- /dev/null +++ b/guice/src/main/java/com/baeldung/examples/guice/Foo.java @@ -0,0 +1,5 @@ +package com.baeldung.examples.guice; + + +public class Foo { +} diff --git a/guice/src/main/java/com/baeldung/examples/guice/FooGenerator.java b/guice/src/main/java/com/baeldung/examples/guice/FooGenerator.java new file mode 100644 index 0000000000..b2d3309d0e --- /dev/null +++ b/guice/src/main/java/com/baeldung/examples/guice/FooGenerator.java @@ -0,0 +1,11 @@ +package com.baeldung.examples.guice; + +import org.springframework.lang.Nullable; + +import com.google.inject.Inject; + +public class FooGenerator { + @Inject + public FooGenerator(@Nullable Foo foo) { + } +} \ No newline at end of file diff --git a/guice/src/main/java/com/baeldung/examples/guice/GuiceUser.java b/guice/src/main/java/com/baeldung/examples/guice/GuiceUser.java new file mode 100644 index 0000000000..df438add5b --- /dev/null +++ b/guice/src/main/java/com/baeldung/examples/guice/GuiceUser.java @@ -0,0 +1,32 @@ +package com.baeldung.examples.guice; + +import com.baeldung.examples.common.Account; +import com.baeldung.examples.common.Address; +import com.google.inject.Inject; + +public class GuiceUser { + + @Inject + private Account account; + + private Address address; + + public Account getAccount() { + return account; + } + + public void setAccount(Account account) { + this.account = account; + } + + public Address getAddress() { + return address; + } + + @Inject + public void setAddress(Address address) { + this.address = address; + address.setCity("Default"); + } + +} diff --git a/guice/src/main/java/com/baeldung/examples/guice/GuiceUserService.java b/guice/src/main/java/com/baeldung/examples/guice/GuiceUserService.java new file mode 100644 index 0000000000..18cb076661 --- /dev/null +++ b/guice/src/main/java/com/baeldung/examples/guice/GuiceUserService.java @@ -0,0 +1,19 @@ +package com.baeldung.examples.guice; + +import com.baeldung.examples.common.AccountService; +import com.google.inject.Inject; + +public class GuiceUserService { + + @Inject + private AccountService accountService; + + public AccountService getAccountService() { + return accountService; + } + + public void setAccountService(AccountService accountService) { + this.accountService = accountService; + } + +} diff --git a/guice/src/main/java/com/baeldung/examples/guice/Person.java b/guice/src/main/java/com/baeldung/examples/guice/Person.java new file mode 100644 index 0000000000..45ee5f4b89 --- /dev/null +++ b/guice/src/main/java/com/baeldung/examples/guice/Person.java @@ -0,0 +1,39 @@ +package com.baeldung.examples.guice; + +import com.baeldung.examples.common.Address; +import com.google.inject.Inject; + +public class Person { + private String firstName; + + private String lastName; + + private Address address; + + public String getFirstName() { + return firstName; + } + + public void setFirstName(String firstName) { + this.firstName = firstName; + } + + public String getLastName() { + return lastName; + } + + public void setLastName(String lastName) { + this.lastName = lastName; + } + + public Address getAddress() { + return address; + } + + @Inject + public void setAddress(Address address) { + this.address = address; + address.setCity("Default"); + } + +} diff --git a/guice/src/main/java/com/baeldung/examples/guice/modules/GuiceModule.java b/guice/src/main/java/com/baeldung/examples/guice/modules/GuiceModule.java new file mode 100644 index 0000000000..44b566240e --- /dev/null +++ b/guice/src/main/java/com/baeldung/examples/guice/modules/GuiceModule.java @@ -0,0 +1,47 @@ +package com.baeldung.examples.guice.modules; + +import com.baeldung.examples.common.AccountService; +import com.baeldung.examples.common.AccountServiceImpl; +import com.baeldung.examples.common.BookService; +import com.baeldung.examples.common.BookServiceImpl; +import com.baeldung.examples.guice.Foo; +import com.baeldung.examples.guice.Person; +import com.google.inject.AbstractModule; +import com.google.inject.Provider; +import com.google.inject.Provides; + +public class GuiceModule extends AbstractModule { + + @Override + protected void configure() { + try { + bind(AccountService.class).to(AccountServiceImpl.class); + bind(Foo.class).toProvider(new Provider() { + public Foo get() { + return null; + } + }); + + bind(Person.class).toConstructor(Person.class.getConstructor()); + // bind(Person.class).toProvider(new Provider() { + // public Person get() { + // Person p = new Person(); + // return p; + // } + // }); + } catch (NoSuchMethodException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + } catch (SecurityException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + } + + } + + @Provides + public BookService bookServiceGenerator() { + return new BookServiceImpl(); + } + +} diff --git a/guice/src/main/java/com/baeldung/examples/spring/AppConfig.java b/guice/src/main/java/com/baeldung/examples/spring/AppConfig.java new file mode 100644 index 0000000000..e5b6648e0d --- /dev/null +++ b/guice/src/main/java/com/baeldung/examples/spring/AppConfig.java @@ -0,0 +1,19 @@ +package com.baeldung.examples.spring; + +import org.springframework.context.annotation.Bean; +import org.springframework.context.annotation.ComponentScan; +import org.springframework.context.annotation.Configuration; + +import com.baeldung.examples.common.BookService; +import com.baeldung.examples.common.BookServiceImpl; + +@Configuration +@ComponentScan("com.baeldung.examples") +public class AppConfig { + + @Bean + public BookService bookServiceGenerator() { + return new BookServiceImpl(); + } + +} diff --git a/guice/src/main/java/com/baeldung/examples/spring/SpringUser.java b/guice/src/main/java/com/baeldung/examples/spring/SpringUser.java new file mode 100644 index 0000000000..ba6aaab09b --- /dev/null +++ b/guice/src/main/java/com/baeldung/examples/spring/SpringUser.java @@ -0,0 +1,35 @@ +package com.baeldung.examples.spring; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.stereotype.Component; + +import com.baeldung.examples.common.Account; +import com.baeldung.examples.common.Address; + +@Component +public class SpringUser { + + @Autowired + private Account account; + + private Address address; + + public Account getAccount() { + return account; + } + + public void setAccount(Account account) { + this.account = account; + } + + public Address getAddress() { + return address; + } + + @Autowired + public void setAddress(Address address) { + this.address = address; + address.setCity("Default"); + } + +} diff --git a/guice/src/main/java/com/baeldung/examples/spring/Student.java b/guice/src/main/java/com/baeldung/examples/spring/Student.java new file mode 100644 index 0000000000..d8b61a91ef --- /dev/null +++ b/guice/src/main/java/com/baeldung/examples/spring/Student.java @@ -0,0 +1,34 @@ +package com.baeldung.examples.spring; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.beans.factory.annotation.Value; +import org.springframework.stereotype.Component; + +@Component +public class Student { + private String firstName; + private String lastName; + + @Autowired + public Student(@Value("Default") String firstName, @Value("Default") String lastName) { + this.firstName = firstName; + this.lastName = lastName; + } + + public String getFirstName() { + return firstName; + } + + public void setFirstName(String firstName) { + this.firstName = firstName; + } + + public String getLastName() { + return lastName; + } + + public void setLastName(String lastName) { + this.lastName = lastName; + } + +} diff --git a/guice/src/main/java/com/baeldung/examples/spring/UserService.java b/guice/src/main/java/com/baeldung/examples/spring/UserService.java new file mode 100644 index 0000000000..91b95c100d --- /dev/null +++ b/guice/src/main/java/com/baeldung/examples/spring/UserService.java @@ -0,0 +1,22 @@ +package com.baeldung.examples.spring; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.stereotype.Component; + +import com.baeldung.examples.common.AccountService; + +@Component +public class UserService { + + @Autowired + private AccountService accountService; + + public AccountService getAccountService() { + return accountService; + } + + public void setAccountService(AccountService accountService) { + this.accountService = accountService; + } + +} diff --git a/guice/src/test/java/com/baeldung/examples/GuiceTests.java b/guice/src/test/java/com/baeldung/examples/GuiceTests.java new file mode 100644 index 0000000000..b87289a1a4 --- /dev/null +++ b/guice/src/test/java/com/baeldung/examples/GuiceTests.java @@ -0,0 +1,72 @@ +package com.baeldung.examples; + +import static org.junit.Assert.assertEquals; +import static org.junit.Assert.assertNotNull; + +import org.junit.Test; + +import com.baeldung.examples.common.BookService; +import com.baeldung.examples.guice.Employee; +import com.baeldung.examples.guice.FooGenerator; +import com.baeldung.examples.guice.GuiceUser; +import com.baeldung.examples.guice.GuiceUserService; +import com.baeldung.examples.guice.Person; +import com.baeldung.examples.guice.modules.GuiceModule; +import com.google.inject.Guice; +import com.google.inject.Injector; + +public class GuiceTests { + + @Test + public void givenAccountFieldInjectedInGuiceUser_WhenGetAccountInvoked_ThenReturnValueIsNotNull() { + Injector injector = Guice.createInjector(new GuiceModule()); + GuiceUser guiceUser = injector.getInstance(GuiceUser.class); + assertNotNull(guiceUser.getAccount()); + } + + @Test + public void givenAccountServiceInjectedInGuiceUserService_WhenGetAccountServiceInvoked_ThenReturnValueIsNotNull() { + Injector injector = Guice.createInjector(new GuiceModule()); + GuiceUserService guiceUserService = injector.getInstance(GuiceUserService.class); + assertNotNull(guiceUserService.getAccountService()); + } + + @Test + public void givenBookServiceIsRegisteredInModule_WhenBookServiceIsInjected_ThenReturnValueIsNotNull() { + Injector injector = Guice.createInjector(new GuiceModule()); + BookService bookService = injector.getInstance(BookService.class); + assertNotNull(bookService); + } + + @Test + public void givenFooGeneratorConstructorParameterIsNotNullable_WhenFooGeneratorIsInjected_ThenTestFailsByProvisionException() { + Injector injector = Guice.createInjector(new GuiceModule()); + FooGenerator fooGenerator = injector.getInstance(FooGenerator.class); + assertNotNull(fooGenerator); + } + + @Test + public void givenMultipleBindingsForPerson_WhenPersonIsInjected_ThenTestFailsByProvisionException() { + Injector injector = Guice.createInjector(new GuiceModule()); + Person person = injector.getInstance(Person.class); + assertNotNull(person); + } + + @Test + public void givenEmployeeConstructorAnnotatedByInject_WhenEmployeeIsInjected_ThenInstanceWillBeCreatedFromTheConstructor() { + Injector injector = Guice.createInjector(new GuiceModule()); + Employee employee = injector.getInstance(Employee.class); + assertNotNull(employee); + assertEquals("Default", employee.getLastName()); + } + + @Test + public void givenAddressAutowiredToGuiceUserBySetterInjection_WhenGuiceUserIsInjected_ThenAddressInitializedByTheSetter() { + Injector injector = Guice.createInjector(new GuiceModule()); + GuiceUser guiceUser = injector.getInstance(GuiceUser.class); + assertNotNull(guiceUser); + assertNotNull(guiceUser.getAddress()); + assertEquals("Default", guiceUser.getAddress().getCity()); + } + +} diff --git a/guice/src/test/java/com/baeldung/examples/SpringTests.java b/guice/src/test/java/com/baeldung/examples/SpringTests.java new file mode 100644 index 0000000000..327e409cc1 --- /dev/null +++ b/guice/src/test/java/com/baeldung/examples/SpringTests.java @@ -0,0 +1,58 @@ +package com.baeldung.examples; + +import static org.junit.Assert.assertEquals; +import static org.junit.Assert.assertNotNull; + +import org.junit.Test; +import org.junit.runner.RunWith; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.context.ApplicationContext; +import org.springframework.test.context.ContextConfiguration; +import org.springframework.test.context.junit4.SpringRunner; + +import com.baeldung.examples.common.BookService; +import com.baeldung.examples.spring.AppConfig; +import com.baeldung.examples.spring.SpringUser; +import com.baeldung.examples.spring.Student; +import com.baeldung.examples.spring.UserService; + +@RunWith(SpringRunner.class) +@ContextConfiguration(classes = { AppConfig.class }) +public class SpringTests { + @Autowired + ApplicationContext context; + + @Test + public void givenAccountFieldAutowiredToSpringUser_WhenGetAccountInvoked_ThenReturnValueIsNotNull() { + SpringUser springUser = context.getBean(SpringUser.class); + assertNotNull(springUser.getAccount()); + } + + @Test + public void givenAccountServiceFieldAutowiredToUserService_WhenGetAccountServiceInvoked_ThenReturnValueIsNotNull() { + UserService userService = context.getBean(UserService.class); + assertNotNull(userService.getAccountService()); + } + + @Test + public void givenBookServiceIsRegisteredAsBeanInContext_WhenBookServiceIsRetrievedFromContext_ThenReturnValueIsNotNull() { + BookService bookService = context.getBean(BookService.class); + assertNotNull(bookService); + } + + @Test + public void givenStudentConstructorAnnotatedByAutowired_WhenStudentIsRetrievedFromContext_ThenInstanceWillBeCreatedFromTheConstructor() { + Student student = context.getBean(Student.class); + assertNotNull(student); + assertEquals("Default", student.getFirstName()); + assertEquals("Default", student.getLastName()); + } + + @Test + public void givenAddressAutowiredToSpringUserBySetterInjection_WhenSpringUserRetrievedFromContext_ThenAddressInitializedByTheSetter() { + SpringUser springUser = context.getBean(SpringUser.class); + assertNotNull(springUser.getAddress()); + assertEquals("Default", springUser.getAddress().getCity()); + } + +}