1 /*
2  * Copyright (C) 2022 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.libraries.pcc.chronicle.api.operation
18 
19 /**
20  * An [OperationLibrary] is a collection of [Operations][Operation] which is searchable by
21  * [Operation.name], [Operation.inputType], and [Operation.outputType].
22  */
23 interface OperationLibrary {
24   /**
25    * Finds a matching [Operation] within the [OperationLibrary], or returns `null` if none is found.
26    */
findOperationnull27   fun <Input, Output> findOperation(
28     name: String,
29     inputType: Class<in Input>,
30     outputType: Class<out Output>,
31   ): Operation<in Input, out Output>?
32 }
33 
34 /**
35  * Finds a matching [Operation] within the receiving [OperationLibrary], or returns `null` if none
36  * is found.
37  */
38 inline fun <reified T> OperationLibrary.findOperation(name: String): Operation<in T, out T>? =
39   findOperation(name, T::class.java, T::class.java)
40