1 /*
2  * Copyright 2019 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 androidx.camera.core;
18 
19 import androidx.annotation.RestrictTo;
20 import androidx.camera.core.impl.MutableConfig;
21 
22 import org.jspecify.annotations.NonNull;
23 
24 /**
25  * Extendable builders are used to add externally defined options that can be passed to the
26  * implementation being built.
27  *
28  * @param <T> the type being built by this builder.
29  */
30 public interface ExtendableBuilder<T> {
31 
32     /**
33      * Returns the underlying {@link MutableConfig} being modified by this builder.
34      *
35      * @return The underlying {@link MutableConfig}.
36      */
37     @RestrictTo(RestrictTo.Scope.LIBRARY_GROUP)
getMutableConfig()38     @NonNull MutableConfig getMutableConfig();
39 
40     /** Creates an instance of the object that this builder produces. */
build()41     @NonNull T build();
42 }
43