DebugLog

DebugLog.java

public final class DebugLog {
  private static final int LOG_TAG_MAX_LENGTH = 23;
  private static final String TEXT_NULL_VALUE = "null value";
  private static final String TEXT_SEPARATOR = " ";

  private DebugLog() {
  }

  private static boolean isDebuggable() {
    return BuildConfig.DEBUG;
  }

  private static @NonNull String formatMessage(@NonNull String message) {
    StackTraceElement[] stackTrace = (new Throwable().getStackTrace());
    if (stackTrace.length >= 2) {
      return String.format("[%s:%s] -> %s(): %s", stackTrace[2].getFileName(), stackTrace[2].getLineNumber(),
          stackTrace[2].getMethodName(), message);
    } else {
      return message;
    }
  }

  private static @NonNull String getApplicationId() {
    String applicationId = BuildConfig.APPLICATION_ID;
    if (applicationId.length() > LOG_TAG_MAX_LENGTH) {
      applicationId = applicationId.substring(0, LOG_TAG_MAX_LENGTH);
    }
    return applicationId;
  }

  @SuppressWarnings("ConstantConditions") private static @NonNull String concatenate(@NonNull Object[] objects) {
    StringBuilder stringBuilder = new StringBuilder();
    if (objects == null) {
      objects = new String[] { TEXT_NULL_VALUE };
    }
    for (Object o : objects) {
      stringBuilder.append(o).append(TEXT_SEPARATOR);
    }
    return stringBuilder.toString();
  }

  public static void d(@NonNull Object... messages) {
    if (isDebuggable()) {
      Log.d(getApplicationId(), formatMessage(concatenate(messages)));
    }
  }

  public static void d(@NonNull Object message, @NonNull Throwable tr) {
    if (isDebuggable()) {
      Log.d(getApplicationId(), formatMessage(String.valueOf(message)), tr);
    }
  }

  public static void e(@NonNull Object... messages) {
    if (isDebuggable()) {
      Log.e(getApplicationId(), formatMessage(concatenate(messages)));
    }
  }

  public static void e(@NonNull Object message, @NonNull Throwable tr) {
    if (isDebuggable()) {
      Log.e(getApplicationId(), formatMessage(String.valueOf(message)), tr);
    }
  }

  public static void i(@NonNull Object... messages) {
    if (isDebuggable()) {
      Log.i(getApplicationId(), formatMessage(concatenate(messages)));
    }
  }

  public static void i(@NonNull Object message, @NonNull Throwable tr) {
    if (isDebuggable()) {
      Log.i(getApplicationId(), formatMessage(String.valueOf(message)), tr);
    }
  }

  public static void v(@NonNull Object... messages) {
    if (isDebuggable()) {
      Log.v(getApplicationId(), formatMessage(concatenate(messages)));
    }
  }

  public static void v(@NonNull Object message, @NonNull Throwable tr) {
    if (isDebuggable()) {
      Log.v(getApplicationId(), formatMessage(String.valueOf(message)), tr);
    }
  }

  public static void w(@NonNull Object... messages) {
    if (isDebuggable()) {
      Log.w(getApplicationId(), formatMessage(concatenate(messages)));
    }
  }

  public static void w(@NonNull Object message, @NonNull Throwable tr) {
    if (isDebuggable()) {
      Log.w(getApplicationId(), formatMessage(String.valueOf(message)), tr);
    }
  }
}