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ec8cbe0fb6
This factors the functionality that was in `FlutterActivity` to live in `FlutterActivityDelegate`. This will allow the creation of a `FlutterFragmentActivity` that has the same core functionality, which in turn unlocks certain Android plugins that choose to require the v4 support library (like Google Sign-In). https://github.com/flutter/flutter/issues/10072
30 lines
898 B
Java
30 lines
898 B
Java
// Copyright 2017 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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package io.flutter.util;
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/**
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* Static convenience methods that help a method or constructor check whether
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* it was invoked correctly (that is, whether its <i>preconditions</i> were
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* met).
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*/
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public final class Preconditions {
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private Preconditions() {}
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/**
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* Ensures that an object reference passed as a parameter to the calling
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* method is not null.
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*
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* @param reference an object reference
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* @return the non-null reference that was validated
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* @throws NullPointerException if {@code reference} is null
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*/
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public static <T> T checkNotNull(T reference) {
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if (reference == null) {
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throw new NullPointerException();
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}
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return reference;
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}
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}
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