1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.server.connectivity.ipmemorystore; 18 19 import android.annotation.NonNull; 20 import android.annotation.Nullable; 21 import android.net.ipmemorystore.Blob; 22 23 /** {@hide} */ 24 public class Utils { 25 /** Pretty print */ blobToString(@ullable final Blob blob)26 public static String blobToString(@Nullable final Blob blob) { 27 return "Blob : " + byteArrayToString(null == blob ? null : blob.data); 28 } 29 30 /** Pretty print */ byteArrayToString(@ullable final byte[] data)31 public static String byteArrayToString(@Nullable final byte[] data) { 32 if (null == data) return "null"; 33 final StringBuilder sb = new StringBuilder("["); 34 if (data.length <= 24) { 35 appendByteArray(sb, data, 0, data.length); 36 } else { 37 appendByteArray(sb, data, 0, 16); 38 sb.append("..."); 39 appendByteArray(sb, data, data.length - 8, data.length); 40 } 41 sb.append("]"); 42 return sb.toString(); 43 } 44 45 // Adds the hex representation of the array between the specified indices (inclusive, exclusive) appendByteArray(@onNull final StringBuilder sb, @NonNull final byte[] ar, final int from, final int to)46 private static void appendByteArray(@NonNull final StringBuilder sb, @NonNull final byte[] ar, 47 final int from, final int to) { 48 for (int i = from; i < to; ++i) { 49 sb.append(String.format("%02X", ar[i])); 50 } 51 } 52 } 53