1 /* 2 * Copyright (C) 2024 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.adservices.shared.meta_testing; 18 19 import com.android.adservices.shared.testing.DynamicLogger; 20 import com.android.adservices.shared.testing.Logger; 21 22 import java.util.Objects; 23 24 /** 25 * Helper class used to wrap an object 26 * 27 * @param <T> class being wrapped 28 */ 29 public abstract class Wrapper<T> { 30 31 protected final Logger mLog; 32 33 private T mWrapped; 34 35 /** Default constructor, sets logger. */ Wrapper()36 public Wrapper() { 37 this(/* checkLogger= */ false, /* logger= */ null); 38 } 39 40 /** Constructor with a custom logger. */ Wrapper(Logger logger)41 public Wrapper(Logger logger) { 42 this(/* checkLogger= */ true, logger); 43 } 44 Wrapper(boolean checkLogger, Logger logger)45 private Wrapper(boolean checkLogger, Logger logger) { 46 if (logger != null) { 47 mLog = logger; 48 } else if (!checkLogger) { 49 mLog = new Logger(DynamicLogger.getInstance(), getClass()); 50 } else { 51 throw new NullPointerException("logger cannot be null"); 52 } 53 } 54 55 /** Sets the wrapped object. */ setWrapped(T wrapped)56 public final void setWrapped(T wrapped) { 57 mWrapped = Objects.requireNonNull(wrapped, "wrapped object cannot be null"); 58 } 59 60 /** Gets the wrapped object. */ getWrapped()61 public final T getWrapped() { 62 if (mWrapped == null) { 63 throw new IllegalStateException("setWrapped() not called"); 64 } 65 return mWrapped; 66 } 67 68 @Override toString()69 public String toString() { 70 return mLog.getTag() + "[wrapped=" + mWrapped + "]"; 71 } 72 } 73