| // Copyright (c) 2020, the R8 project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| package com.android.tools.r8.ir.analysis.value; |
| |
| import com.android.tools.r8.graph.AppView; |
| import com.android.tools.r8.graph.DexEncodedField; |
| import com.android.tools.r8.graph.DexField; |
| import com.android.tools.r8.graph.GraphLens; |
| import com.android.tools.r8.shaking.AppInfoWithLiveness; |
| import java.util.function.BiConsumer; |
| |
| public class EmptyObjectState extends ObjectState { |
| |
| private static final EmptyObjectState INSTANCE = new EmptyObjectState(); |
| |
| private EmptyObjectState() {} |
| |
| public static EmptyObjectState getInstance() { |
| return INSTANCE; |
| } |
| |
| @Override |
| public void forEachAbstractFieldValue(BiConsumer<DexField, AbstractValue> consumer) { |
| // Intentionally empty. |
| } |
| |
| @Override |
| public AbstractValue getAbstractFieldValue(DexEncodedField field) { |
| return UnknownValue.getInstance(); |
| } |
| |
| @Override |
| public boolean isEmpty() { |
| return true; |
| } |
| |
| @Override |
| public ObjectState rewrittenWithLens(AppView<AppInfoWithLiveness> appView, GraphLens lens) { |
| return this; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| return this == o; |
| } |
| |
| @Override |
| public int hashCode() { |
| return System.identityHashCode(this); |
| } |
| } |