LensFacingConverter.java
/*
* Copyright 2019 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;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.annotation.RestrictTo;
/**
* Helper class that defines certain enum-like methods for {@link LensFacing}
*
* @hide
*/
@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP)
public class LensFacingConverter {
private LensFacingConverter() {
}
/**
* @return an array containing the constants of {@link LensFacing} in the order they're
* declared.
*/
@NonNull
public static Integer[] values() {
return new Integer[]{LensFacing.FRONT, LensFacing.BACK};
}
/**
* Returns the {@link LensFacing} constant for the specified name
*
* @param name The name of the {@link LensFacing} to return
* @return The {@link LensFacing} constant for the specified name
*/
@LensFacing
public static int valueOf(@Nullable final String name) {
if (name == null) {
throw new NullPointerException("name cannot be null");
}
switch (name) {
case "FRONT":
return LensFacing.FRONT;
case "BACK":
return LensFacing.BACK;
default:
throw new IllegalArgumentException("Unknown len facing name " + name);
}
}
/**
* Returns the name of the {@link LensFacing} constant, exactly as it is declared.
*
* @param lensFacing A {@link LensFacing} constant
* @return The name of the {@link LensFacing} constant.
*/
@NonNull
public static String nameOf(@LensFacing final int lensFacing) {
switch (lensFacing) {
case LensFacing.FRONT:
return "FRONT";
case LensFacing.BACK:
return "BACK";
default:
throw new IllegalArgumentException("Unknown lens facing " + lensFacing);
}
}
}