#107 Dependency Injection example JavaDoc
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@ -9,23 +9,27 @@ import com.google.inject.Injector;
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* implements so called inversion of control principle. Inversion of control has two specific rules:
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* implements so called inversion of control principle. Inversion of control has two specific rules:
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* - High-level modules should not depend on low-level modules. Both should depend on abstractions.
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* - High-level modules should not depend on low-level modules. Both should depend on abstractions.
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* - Abstractions should not depend on details. Details should depend on abstractions.
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* - Abstractions should not depend on details. Details should depend on abstractions.
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*
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* <p>
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* In this example we show you three different wizards. The first one (SimpleWizard) is a naive
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* In this example we show you three different wizards. The first one ({@link SimpleWizard}) is a naive
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* implementation violating the inversion of control principle. It depends directly on a concrete
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* implementation violating the inversion of control principle. It depends directly on a concrete
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* implementation which cannot be changed.
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* implementation which cannot be changed.
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*
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* <p>
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* The second wizard (AdvancedWizard) is more flexible. It does not depend on any concrete implementation
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* The second wizard ({@link AdvancedWizard}) is more flexible. It does not depend on any concrete implementation
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* but abstraction. It utilizes Dependency Injection pattern allowing its Tobacco dependency to be
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* but abstraction. It utilizes Dependency Injection pattern allowing its {@link Tobacco} dependency to be
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* injected through its constructor. This way, handling the dependency is no longer the wizard's
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* injected through its constructor. This way, handling the dependency is no longer the wizard's
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* responsibility. It is resolved outside the wizard class.
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* responsibility. It is resolved outside the wizard class.
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*
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* <p>
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* The third example takes the pattern a step further. It uses Guice framework for Dependency Injection.
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* The third example takes the pattern a step further. It uses Guice framework for Dependency Injection.
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* TobaccoModule binds a concrete implementation to abstraction. Injector is then used to create
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* {@link TobaccoModule} binds a concrete implementation to abstraction. Injector is then used to create
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* GuiceWizard object with correct dependencies.
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* {@link GuiceWizard} object with correct dependencies.
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*
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*
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*/
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*/
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public class App {
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public class App {
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/**
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* Program entry point
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* @param args command line args
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*/
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public static void main( String[] args ) {
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public static void main( String[] args ) {
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SimpleWizard simpleWizard = new SimpleWizard();
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SimpleWizard simpleWizard = new SimpleWizard();
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simpleWizard.smoke();
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simpleWizard.smoke();
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@ -2,7 +2,7 @@ package com.iluwatar.dependency.injection;
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/**
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/**
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*
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*
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* OldTobyTobacco concrete Tobacco implementation
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* OldTobyTobacco concrete {@link Tobacco} implementation
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*
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*
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*/
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*/
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public class OldTobyTobacco extends Tobacco {
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public class OldTobyTobacco extends Tobacco {
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@ -2,7 +2,7 @@ package com.iluwatar.dependency.injection;
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/**
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/**
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*
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*
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* RivendellTobacco concrete Tobacco implementation
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* RivendellTobacco concrete {@link Tobacco} implementation
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*
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*
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*/
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*/
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public class RivendellTobacco extends Tobacco {
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public class RivendellTobacco extends Tobacco {
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@ -2,7 +2,7 @@ package com.iluwatar.dependency.injection;
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/**
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/**
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*
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*
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* SecondBreakfastTobacco concrete Tobacco implementation
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* SecondBreakfastTobacco concrete {@link Tobacco} implementation
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*
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*
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*/
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*/
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public class SecondBreakfastTobacco extends Tobacco {
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public class SecondBreakfastTobacco extends Tobacco {
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@ -4,7 +4,7 @@ import com.google.inject.AbstractModule;
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/**
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/**
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*
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*
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* Guice module for binding certain concrete Tobacco implementation.
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* Guice module for binding certain concrete {@link Tobacco} implementation.
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*
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*
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*/
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*/
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public class TobaccoModule extends AbstractModule {
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public class TobaccoModule extends AbstractModule {
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@ -4,6 +4,11 @@ import org.junit.Test;
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import com.iluwatar.dependency.injection.App;
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import com.iluwatar.dependency.injection.App;
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/**
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*
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* Application test
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*
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*/
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public class AppTest {
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public class AppTest {
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@Test
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@Test
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