1 /* 2 * Copyright 2017 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.internal.telephony.util; 18 19 import android.os.SystemClock; 20 21 /** 22 * A pair containing a value and an associated time stamp. 23 * 24 * @param <T> The type of the value. 25 */ 26 public final class TimeStampedValue<T> { 27 28 /** The value. */ 29 public final T mValue; 30 31 /** 32 * The value of {@link SystemClock#elapsedRealtime} or equivalent when value was 33 * determined. 34 */ 35 public final long mElapsedRealtime; 36 37 public TimeStampedValue(T value, long elapsedRealtime) { 38 this.mValue = value; 39 this.mElapsedRealtime = elapsedRealtime; 40 } 41 42 @Override 43 public boolean equals(Object o) { 44 if (this == o) { 45 return true; 46 } 47 if (o == null || getClass() != o.getClass()) { 48 return false; 49 } 50 51 TimeStampedValue<?> that = (TimeStampedValue<?>) o; 52 53 if (mElapsedRealtime != that.mElapsedRealtime) { 54 return false; 55 } 56 return mValue != null ? mValue.equals(that.mValue) : that.mValue == null; 57 } 58 59 @Override 60 public int hashCode() { 61 int result = mValue != null ? mValue.hashCode() : 0; 62 result = 31 * result + (int) (mElapsedRealtime ^ (mElapsedRealtime >>> 32)); 63 return result; 64 } 65 66 @Override 67 public String toString() { 68 return "TimeStampedValue{" 69 + "mValue=" + mValue 70 + ", elapsedRealtime=" + mElapsedRealtime 71 + '}'; 72 } 73 } 74
