| /* |
| * Copyright (C) 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 android.hardware.biometrics; |
| |
| import android.os.NativeHandle; |
| import android.os.ParcelFileDescriptor; |
| |
| import java.io.IOException; |
| |
| /** |
| * A class that contains utilities for IBiometricNativeHandle. |
| * |
| * @hide |
| */ |
| public final class BiometricNativeHandleUtils { |
| |
| private BiometricNativeHandleUtils() { |
| } |
| |
| /** |
| * Converts a {@link NativeHandle} into an {@link IBiometricNativeHandle} by duplicating the |
| * underlying file descriptors. |
| * |
| * Both the original and new handle must be closed after use. |
| * |
| * @param h {@link NativeHandle}. Usually used to identify a WindowManager window. Can be null. |
| * @return A {@link IBiometricNativeHandle} representation of {@code h}. Will be null if |
| * {@code h} or its raw file descriptors are null. |
| */ |
| public static IBiometricNativeHandle dup(NativeHandle h) { |
| IBiometricNativeHandle handle = null; |
| if (h != null && h.getFileDescriptors() != null && h.getInts() != null) { |
| handle = new IBiometricNativeHandle(); |
| handle.ints = h.getInts().clone(); |
| handle.fds = new ParcelFileDescriptor[h.getFileDescriptors().length]; |
| for (int i = 0; i < h.getFileDescriptors().length; ++i) { |
| try { |
| handle.fds[i] = ParcelFileDescriptor.dup(h.getFileDescriptors()[i]); |
| } catch (IOException e) { |
| return null; |
| } |
| } |
| } |
| return handle; |
| } |
| |
| /** |
| * Closes the handle's file descriptors. |
| * |
| * @param h {@link IBiometricNativeHandle} handle. |
| */ |
| public static void close(IBiometricNativeHandle h) { |
| if (h != null) { |
| for (ParcelFileDescriptor fd : h.fds) { |
| if (fd != null) { |
| try { |
| fd.close(); |
| } catch (IOException e) { |
| // do nothing. |
| } |
| } |
| } |
| } |
| } |
| } |