1 /* 2 * Copyright (C) 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 package com.android.car.storagemonitoring; 17 18 import static java.util.Objects.hash; 19 20 import android.car.storagemonitoring.WearEstimate; 21 import java.time.Instant; 22 23 public final class WearInformation { 24 public static final int UNKNOWN_LIFETIME_ESTIMATE = -1; 25 26 public static final int UNKNOWN_PRE_EOL_INFO = 0; 27 public static final int PRE_EOL_INFO_NORMAL = 1; 28 public static final int PRE_EOL_INFO_WARNING = 2; 29 public static final int PRE_EOL_INFO_URGENT = 3; 30 31 private static final String UNKNOWN = "unknown"; 32 private static final String[] PRE_EOL_STRINGS = new String[] { 33 UNKNOWN, "normal", "warning", "urgent" 34 }; 35 36 /** 37 * A lower bound on the lifetime estimate for "type A" memory cells, expressed as a percentage. 38 */ 39 public final int lifetimeEstimateA; 40 41 /** 42 * A lower bound on the lifetime estimate for "type B" memory cells, expressed as a percentage. 43 */ 44 public final int lifetimeEstimateB; 45 46 /** 47 * An estimate of the lifetime based on reserved block consumption. 48 */ 49 public final int preEolInfo; 50 WearInformation(int lifetimeA, int lifetimeB, int preEol)51 public WearInformation(int lifetimeA, int lifetimeB, int preEol) { 52 lifetimeEstimateA = lifetimeA; 53 lifetimeEstimateB = lifetimeB; 54 preEolInfo = preEol; 55 } 56 57 @Override hashCode()58 public int hashCode() { 59 return hash(lifetimeEstimateA, lifetimeEstimateB, preEolInfo); 60 } 61 62 @Override equals(Object other)63 public boolean equals(Object other) { 64 if (other instanceof WearInformation) { 65 WearInformation wi = (WearInformation)other; 66 return (wi.lifetimeEstimateA == lifetimeEstimateA) && 67 (wi.lifetimeEstimateB == lifetimeEstimateB) && 68 (wi.preEolInfo == preEolInfo); 69 } else { 70 return false; 71 } 72 } 73 lifetimeToString(int lifetime)74 private String lifetimeToString(int lifetime) { 75 if (lifetime == UNKNOWN_LIFETIME_ESTIMATE) return UNKNOWN; 76 77 return lifetime + "%"; 78 } 79 80 @Override toString()81 public String toString() { 82 return String.format("lifetime estimate: A = %s, B = %s; pre EOL info: %s", 83 lifetimeToString(lifetimeEstimateA), 84 lifetimeToString(lifetimeEstimateB), 85 PRE_EOL_STRINGS[preEolInfo]); 86 } 87 toWearEstimate()88 public WearEstimate toWearEstimate() { 89 return new WearEstimate(lifetimeEstimateA, lifetimeEstimateB); 90 } 91 } 92