ExtendedCameraConfigProviderStore.java
/*
* Copyright 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.camera.core.impl;
import androidx.annotation.GuardedBy;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import java.util.HashMap;
import java.util.Map;
/**
* Stores {@link CameraConfigProvider} instances which allow building {@link CameraConfig} using
* keys (extensions modes for example). The provided {@link CameraConfig}s are unique to the device.
*/
@RequiresApi(21) // TODO(b/200306659): Remove and replace with annotation on package-info.java
public final class ExtendedCameraConfigProviderStore {
private static final Object LOCK = new Object();
@GuardedBy("LOCK")
private static final Map<Object, CameraConfigProvider> CAMERA_CONFIG_PROVIDERS =
new HashMap<>();
private ExtendedCameraConfigProviderStore() {
}
/**
* Associates the specified {@link CameraConfigProvider} with the specified key and stores them.
*/
public static void addConfig(@NonNull Object key, @NonNull CameraConfigProvider provider) {
synchronized (LOCK) {
CAMERA_CONFIG_PROVIDERS.put(key, provider);
}
}
/**
* Retrieves the {@link CameraConfigProvider} associated with the specified key.
*
* <p>A default {@link CameraConfigProvider#EMPTY} will be returned if there isn't a
* {@link CameraConfigProvider} associated with the key.
*/
@NonNull
public static CameraConfigProvider getConfigProvider(@NonNull Object key) {
final CameraConfigProvider provider;
synchronized (LOCK) {
provider = CAMERA_CONFIG_PROVIDERS.get(key);
}
if (provider == null) {
return CameraConfigProvider.EMPTY;
}
return provider;
}
}