Java Code Examples for com.google.firebase.FirebaseApp#get()

/**
 * Gets a FirebaseDatabase instance for the specified URL, using the specified FirebaseApp.
 *
 * @param app The FirebaseApp to get a FirebaseDatabase for.
 * @param url The URL to the Firebase Database instance you want to access.
 * @return A FirebaseDatabase instance.
 */
@NonNull
public static synchronized FirebaseDatabase getInstance(
    @NonNull FirebaseApp app, @NonNull String url) {
  if (TextUtils.isEmpty(url)) {
    throw new DatabaseException(
        "Failed to get FirebaseDatabase instance: Specify DatabaseURL within "
            + "FirebaseApp or from your getInstance() call.");
  }

  ParsedUrl parsedUrl = Utilities.parseUrl(url, getEmulatorServiceSettings(app));
  if (!parsedUrl.path.isEmpty()) {
    throw new DatabaseException(
        "Specified Database URL '"
            + url
            + "' is invalid. It should point to the root of a "
            + "Firebase Database but it includes a path: "
            + parsedUrl.path.toString());
  }

  checkNotNull(app, "Provided FirebaseApp must not be null.");
  FirebaseDatabaseComponent component = app.get(FirebaseDatabaseComponent.class);
  checkNotNull(component, "Firebase Database component is not present.");

  return component.get(parsedUrl.repoInfo);
}
 

/**
 * Gets the singleton {@link FirebaseCrashlytics} instance.
 *
 * <p>The default {@link FirebaseApp} instance must be initialized before this function is called.
 * See <a
 * href="https://firebase.google.com/docs/reference/android/com/google/firebase/FirebaseApp">
 * FirebaseApp</a> for more information.
 */
@NonNull
public static FirebaseCrashlytics getInstance() {
  final FirebaseApp app = FirebaseApp.getInstance();
  final FirebaseCrashlytics instance = app.get(FirebaseCrashlytics.class);
  if (instance == null) {
    throw new NullPointerException("FirebaseCrashlytics component is not present.");
  }
  return instance;
}
 

@Test
public void getComponents_publishesLibVersionComponent() {
  FirebaseApp app =
      FirebaseApp.initializeApp(
          RuntimeEnvironment.application.getApplicationContext(),
          new FirebaseOptions.Builder()
              .setApplicationId("1:196403931065:android:60949756fbe381ea")
              .build());

  UserAgentPublisher userAgentPublisher = app.get(UserAgentPublisher.class);
  String actualUserAgent = userAgentPublisher.getUserAgent();

  assertThat(actualUserAgent).contains("fire-fn");
}
 

/**
 * Creates a Cloud Functions client with the given app and region.
 *
 * @param app The app for the Firebase project.
 * @param region The region for the HTTPS trigger, such as "us-central1".
 */
@NonNull
public static FirebaseFunctions getInstance(@NonNull FirebaseApp app, @NonNull String region) {
  Preconditions.checkNotNull(app, "You must call FirebaseApp.initializeApp first.");
  Preconditions.checkNotNull(region);

  FunctionsMultiResourceComponent component = app.get(FunctionsMultiResourceComponent.class);
  Preconditions.checkNotNull(component, "Functions component does not exist.");

  return component.get(region);
}
 

@Test
public void getComponents_publishesLibVersionComponent() {
  FirebaseApp app = appForDatabaseUrl(TEST_NAMESPACE, "test");
  UserAgentPublisher userAgentPublisher = app.get(UserAgentPublisher.class);

  String actualUserAgent = userAgentPublisher.getUserAgent();
  assertThat(actualUserAgent).contains("fire-rtdb");
}
 

@Ignore
@Test
public void storageRegistrar_getComponents_publishesLibVersionComponent() {
  FirebaseApp app =
      FirebaseApp.initializeApp(
          ApplicationProvider.getApplicationContext(),
          new FirebaseOptions.Builder()
              .setProjectId("projectId")
              .setApplicationId("1:196403931065:android:60949756fbe381ea")
              .build());
  UserAgentPublisher userAgentPublisher = app.get(UserAgentPublisher.class);
  String actualUserAgent = userAgentPublisher.getUserAgent();

  assertThat(actualUserAgent).contains("fire-fst");
}
 

@NonNull
private static FirebaseFirestore getInstance(@NonNull FirebaseApp app, @NonNull String database) {
  checkNotNull(app, "Provided FirebaseApp must not be null.");
  FirestoreMultiDbComponent component = app.get(FirestoreMultiDbComponent.class);
  checkNotNull(component, "Firestore component is not present.");
  return component.get(database);
}
 

@Test
public void getComponents_publishesLibVersionComponent() {
  FirebaseApp app =
      FirebaseApp.initializeApp(
          RuntimeEnvironment.application.getApplicationContext(),
          new FirebaseOptions.Builder()
              .setApplicationId("1:196403931065:android:60949756fbe381ea")
              .build());
  UserAgentPublisher userAgentPublisher = app.get(UserAgentPublisher.class);
  String actualUserAgent = userAgentPublisher.getUserAgent();

  assertThat(actualUserAgent).contains("fire-gcs");
}
 

private static FirebaseStorage getInstanceImpl(@NonNull FirebaseApp app, @Nullable Uri url) {
  String bucketName = url != null ? url.getHost() : null;

  if (url != null && !TextUtils.isEmpty(url.getPath())) {
    throw new IllegalArgumentException(STORAGE_BUCKET_WITH_PATH_EXCEPTION);
  }

  Preconditions.checkNotNull(app, "Provided FirebaseApp must not be null.");
  FirebaseStorageComponent component = app.get(FirebaseStorageComponent.class);
  Preconditions.checkNotNull(component, "Firebase Storage component is not present.");
  return component.get(bucketName);
}
 

/** method returns void so it is not allowed. */
public static void getInstance(FirebaseApp app, String foo) {
  // BUG: Diagnostic contains: FirebaseApp#get(Class) is discouraged
  app.get(String.class);
}
 

/** method returns String so it is not allowed. */
public static String getInstance(FirebaseApp app) {
  // BUG: Diagnostic contains: FirebaseApp#get(Class) is discouraged
  app.get(String.class);
  return "";
}
 

/** Valid use with one app parameter. */
public static FirebaseUseExplicitDependenciesNegativeCases getInstance(FirebaseApp app) {
  app.get(String.class);
  return null;
}
 

/** Valid use with multiple parameters. */
public static FirebaseUseExplicitDependenciesNegativeCases getInstance(
    FirebaseApp app, String foo) {
  app.get(String.class);
  return null;
}
 

/** Valid private use with multiple parameters. */
private static FirebaseUseExplicitDependenciesNegativeCases getInstance(
    FirebaseApp app, Integer i) {
  app.get(String.class);
  return null;
}
 

public static SuperType getInstance(FirebaseApp app) {
  app.get(String.class);
  return null;
}
 

public static Iface getInstance(FirebaseApp app) {
  app.get(String.class);
  return null;
}
 

public void useOfAppGetInInstanceMethod(FirebaseApp app) {
  // BUG: Diagnostic contains: FirebaseApp#get(Class) is discouraged
  app.get(String.class);
}
 

@NonNull
public static synchronized FirebaseDynamicLinks getInstance(@NonNull FirebaseApp firebaseApp) {
  return firebaseApp.get(FirebaseDynamicLinks.class);
}
 

/**
 * Returns the {@link FirebaseSegmentation} initialized with a custom {@link FirebaseApp}.
 *
 * @param app a custom {@link FirebaseApp}
 * @return a {@link FirebaseSegmentation} instance
 */
@NonNull
public static FirebaseSegmentation getInstance(@NonNull FirebaseApp app) {
  Preconditions.checkArgument(app != null, "Null is not a valid value " + "of FirebaseApp.");
  return app.get(FirebaseSegmentation.class);
}
 

/**
 * Returns the {@link FirebaseInstallations} initialized with a custom {@link FirebaseApp}.
 *
 * @param app a custom {@link FirebaseApp}
 * @return a {@link FirebaseInstallations} instance
 */
@NonNull
public static FirebaseInstallations getInstance(@NonNull FirebaseApp app) {
  Preconditions.checkArgument(app != null, "Null is not a valid value of FirebaseApp.");
  return (FirebaseInstallations) app.get(FirebaseInstallationsApi.class);
}