1 /* 2 * Copyright (C) 2023 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 android.tools.common 18 19 import kotlin.js.JsExport 20 import kotlin.js.JsName 21 22 @JsExport 23 interface ITrace<Entry : ITraceEntry> { 24 @JsName("entries") val entries: Array<Entry> 25 slicenull26 @JsName("slice") fun slice(startTimestamp: Timestamp, endTimestamp: Timestamp): ITrace<Entry> 27 28 /** 29 * @return an entry that matches exactly [timestamp] 30 * @throws if there is no entry in the trace at [timestamp] 31 */ 32 @JsName("getEntryExactlyAt") 33 fun getEntryExactlyAt(timestamp: Timestamp): Entry { 34 return entries.firstOrNull { it.timestamp == timestamp } 35 ?: throw RuntimeException("Entry does not exist for timestamp $timestamp") 36 } 37 38 /** 39 * @return the entry that is "active' at [timestamp] 40 * 41 * ``` 42 * (the entry at [timestamp] or the one before it if no entry exists at [timestamp]) 43 * @throws if 44 * ``` 45 * 46 * the provided [timestamp] is before all entries in the trace 47 */ 48 @JsName("getEntryAt") getEntryAtnull49 fun getEntryAt(timestamp: Timestamp): Entry { 50 return entries.dropLastWhile { it.timestamp > timestamp }.lastOrNull() 51 ?: error("No entry at or before timestamp $timestamp") 52 } 53 } 54