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      1 /*
      2  * Copyright (C) 2011 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.cts.verifier.nfc.tech;
     18 
     19 import android.nfc.NdefMessage;
     20 import android.nfc.NdefRecord;
     21 
     22 import java.util.Arrays;
     23 
     24 /** Class with utility methods for testing equality of messages and displaying byte payloads. */
     25 public class NfcUtils {
     26 
     27     public static boolean areMessagesEqual(NdefMessage message, NdefMessage otherMessage) {
     28         return message != null && otherMessage != null
     29                 && areRecordArraysEqual(message.getRecords(), otherMessage.getRecords());
     30     }
     31 
     32     private static boolean areRecordArraysEqual(NdefRecord[] records, NdefRecord[] otherRecords) {
     33         if (records.length == otherRecords.length) {
     34             for (int i = 0; i < records.length; i++) {
     35                 if (!areRecordsEqual(records[i], otherRecords[i])) {
     36                     return false;
     37                 }
     38             }
     39             return true;
     40         } else {
     41             return false;
     42         }
     43     }
     44 
     45     private static boolean areRecordsEqual(NdefRecord record, NdefRecord otherRecord) {
     46         return Arrays.equals(record.toByteArray(), otherRecord.toByteArray());
     47     }
     48 
     49     static CharSequence displayByteArray(byte[] bytes) {
     50         StringBuilder builder = new StringBuilder().append("[");
     51         for (int i = 0; i < bytes.length; i++) {
     52             builder.append(Byte.toString(bytes[i]));
     53             if (i + 1 < bytes.length) {
     54                 builder.append(", ");
     55             }
     56         }
     57         return builder.append("]");
     58     }
     59 }
     60