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/*
* Copyright (C) 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 android.net.util;
import android.annotation.NonNull;
import android.util.SparseArray;
import java.io.FileDescriptor;
import java.io.IOException;
import java.util.List;
import java.util.function.Predicate;
/**
* Collection of utilities for the network stack.
*/
public class NetworkStackUtils {
/**
* @return True if the array is null or 0-length.
*/
public static <T> boolean isEmpty(T[] array) {
return array == null || array.length == 0;
}
/**
* Close a socket, ignoring any exception while closing.
*/
public static void closeSocketQuietly(FileDescriptor fd) {
try {
SocketUtils.closeSocket(fd);
} catch (IOException ignored) {
}
}
/**
* Returns an int array from the given Integer list.
*/
public static int[] convertToIntArray(@NonNull List<Integer> list) {
int[] array = new int[list.size()];
for (int i = 0; i < list.size(); i++) {
array[i] = list.get(i);
}
return array;
}
/**
* Returns a long array from the given long list.
*/
public static long[] convertToLongArray(@NonNull List<Long> list) {
long[] array = new long[list.size()];
for (int i = 0; i < list.size(); i++) {
array[i] = list.get(i);
}
return array;
}
/**
* @return True if there exists at least one element in the sparse array for which
* condition {@code predicate}
*/
public static <T> boolean any(SparseArray<T> array, Predicate<T> predicate) {
for (int i = 0; i < array.size(); ++i) {
if (predicate.test(array.valueAt(i))) {
return true;
}
}
return false;
}
}
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