1 /*
2  * Copyright 2018 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 androidx.work
17 
18 /**
19  * An [InputMerger] that attempts to add all keys from all inputs to the output. In case of a
20  * conflict, this class will overwrite the previously-set key. Because there is no defined order for
21  * inputs, this implementation is best suited for cases where conflicts will not happen, or where
22  * overwriting is a valid strategy to deal with them.
23  */
24 class OverwritingInputMerger : InputMerger() {
mergenull25     override fun merge(inputs: List<Data>): Data {
26         val output = Data.Builder()
27         val mergedValues = mutableMapOf<String, Any?>()
28         for (input in inputs) {
29             mergedValues.putAll(input.keyValueMap)
30         }
31         output.putAll(mergedValues)
32         return output.build()
33     }
34 }
35