ImmutableZoomState.java
/*
* Copyright 2020 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.internal;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import androidx.camera.core.ZoomState;
import com.google.auto.value.AutoValue;
/**
* An implementation of {@link ZoomState} that is immutable.
*/
@RequiresApi(21) // TODO(b/200306659): Remove and replace with annotation on package-info.java
@AutoValue
public abstract class ImmutableZoomState implements ZoomState {
/** Create an immutable instance of {@link ZoomState}. */
@NonNull
public static ZoomState create(float zoomRatio, float maxZoomRatio, float minZoomRatio,
float linearZoom) {
return new AutoValue_ImmutableZoomState(zoomRatio, maxZoomRatio, minZoomRatio, linearZoom);
}
/** Create an immutable instance of {@link ZoomState}. */
@NonNull
public static ZoomState create(@NonNull ZoomState zoomState) {
return new AutoValue_ImmutableZoomState(zoomState.getZoomRatio(),
zoomState.getMaxZoomRatio(),
zoomState.getMinZoomRatio(), zoomState.getLinearZoom());
}
@Override
public abstract float getZoomRatio();
@Override
public abstract float getMaxZoomRatio();
@Override
public abstract float getMinZoomRatio();
@Override
public abstract float getLinearZoom();
}