/* * Copyright (c) 2013 - present Facebook, Inc. * All rights reserved. * * This source code is licensed under the BSD style license found in the * LICENSE file in the root directory of this source tree. An additional grant * of patent rights can be found in the PATENTS file in the same directory. */ package codetoanalyze.java.eradicate; import android.support.annotation.NonNull; import android.widget.EditText; import butterknife.Bind; import com.facebook.infer.annotation.SuppressViewNullability; import javax.annotation.Nonnull; import javax.annotation.Nullable; import javax.inject.Inject; public class FieldNotInitialized { String a; @Nullable String b; @Nonnull String c; // Means: assume it will be initialized to a nonnull value somewhere else. @Inject String d; // Means: assume it will be initialized via dependency injection @NonNull String e; @Bind(42) EditText f; // Means: assume it will be initialized, and ignore null assignment @SuppressViewNullability EditText g; // Eradicate should only report one initialization error FieldNotInitialized() {} void testNullifyFields() { f = null; // OK the framework could write null into the field g = null; // OK the framework could write null into the field } class OnlyRead { Object o; OnlyRead() { Object x = o; // not initialized } } class WriteItself { Object o; WriteItself() { o = o; // not initialized } } class Swap { Object o1; Object o2; Swap() { o1 = o2; // not initialized o2 = new Object(); } } class SwapOK { Object o1; Object o2; SwapOK() { o1 = new Object(); o2 = o1; } } class OnlyReadIndirect { Object o1; Object o2; private void indirect() { Object x = o1; // not initialized o2 = new Object(); } OnlyReadIndirect() { indirect(); } } class ConditionalFieldInit { Object o1; @Nullable Object o2 = null; public ConditionalFieldInit() { if (o2 != null) { o1 = new Object(); // Not always initialized } } } class InitIfNull { Object o; public InitIfNull() { if (o == null) o = new Object(); } } class InitIfNull2 { Object o; public InitIfNull2(Object x) { if (o == null) o = x; } } class InitIfNull3 { Object o; Object getNotNull() { return new Object(); } public InitIfNull3() { if (o == null) o = getNotNull(); } } }