Part 2

part-2/src/main/java/com/acme/GpsSensor.java

@@ -0,0 +1,10 @@
+package com.acme;
+
+public class GpsSensor {
+
+    public GpsSensor() {
+    }
+
+    public void calibrate() {
+    }
+}

part-2/src/main/java/com/example/Application.java

@@ -0,0 +1,55 @@
+package com.example;
+
+import javax.inject.*;
+import dagger.*;
+import com.acme.*;
+
+@Module
+class YahooWeatherModule {
+
+    private final String key;
+
+    public YahooWeatherModule(String key) {
+        this.key = key;
+    }
+
+    @Provides
+    WeatherService provideWeatherService(WebSocket socket) {
+        return new YahooWeather(key, socket);
+    }
+}
+
+@Module
+class WeatherChannelModule {
+    @Provides
+    WeatherService provideWeatherService() {
+        return new WeatherChannel();
+    }
+}
+
+@Module
+class GpsSensorModule {
+    @Provides
+    GpsSensor provideGpsSensor() {
+        GpsSensor gps = new GpsSensor();
+        gps.calibrate();
+        return gps;
+    }
+}
+
+@Component(modules = {YahooWeatherModule.class, GpsSensorModule.class})
+interface AppComponent {
+    WeatherReporter getWeatherReporter();
+}
+
+public class Application {
+    public static void main(String args[]) {
+        String apiKey = args[0];
+        YahooWeatherModule yahoo = new YahooWeatherModule(apiKey);
+        AppComponent component = DaggerAppComponent.builder()
+               .yahooWeatherModule(yahoo)
+               .build();
+        WeatherReporter reporter = component.getWeatherReporter();
+        reporter.report();
+    }
+}

part-2/src/main/java/com/example/LocationManager.java

@@ -0,0 +1,14 @@
+package com.example;
+
+import javax.inject.*;
+import com.acme.*;
+
+public class LocationManager {
+
+    private final GpsSensor gps;
+
+    @Inject
+    public LocationManager(GpsSensor gps) {
+        this.gps = gps;
+    }
+}

part-2/src/main/java/com/example/WeatherChannel.java

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+package com.example;
+import javax.inject.Inject;
+
+public class WeatherChannel implements WeatherService {
+    @Inject
+    public WeatherChannel() {
+    }
+}

part-2/src/main/java/com/example/WeatherReporter.java

@@ -0,0 +1,22 @@
+package com.example;
+import javax.inject.*;
+
+public class WeatherReporter {
+
+    private final WeatherService weatherService;
+
+    private final LocationManager locationManager;
+
+    @Inject
+    public WeatherReporter(WeatherService weatherService,
+                           LocationManager locationManager) {
+        this.locationManager = locationManager;
+        this.weatherService = weatherService;
+    }
+
+    public void report() {
+        // locationManager.getCurrentLocation()
+        // weatherService.getConditionsAt(currentLocation)
+        System.out.println("Mostly clouded, 26 C\n");
+    }
+}

part-2/src/main/java/com/example/WeatherService.java

@@ -0,0 +1,5 @@
+package com.example;
+import javax.inject.*;
+
+public interface WeatherService {
+}

part-2/src/main/java/com/example/WebSocket.java

@@ -0,0 +1,8 @@
+package com.example;
+import javax.inject.Inject;
+
+public class WebSocket {
+    @Inject
+    public WebSocket() {
+    }
+}

part-2/src/main/java/com/example/YahooWeather.java

@@ -0,0 +1,14 @@
+package com.example;
+import javax.inject.Inject;
+
+public class YahooWeather implements WeatherService {
+
+    private final WebSocket socket;
+
+    private final String key;
+
+    public YahooWeather(String key, WebSocket socket) {
+        this.key = key;
+        this.socket = socket;
+    }
+}