1 /* 2 * Copyright (C) 2017 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.car; 18 19 import java.util.HashMap; 20 import java.util.Map; 21 import java.util.List; 22 import java.util.ArrayList; 23 import java.util.Arrays; 24 import com.android.internal.annotations.GuardedBy; 25 import android.util.Log; 26 27 public class VmsPublishersInfo { 28 private static final String TAG = "VmsPublishersInfo"; 29 private static final boolean DBG = true; 30 private final Object mLock = new Object(); 31 @GuardedBy("mLock") 32 private final Map<InfoWrapper, Integer> mPublishersIds = new HashMap(); 33 @GuardedBy("mLock") 34 private final Map<Integer, byte[]> mPublishersInfo = new HashMap(); 35 36 private static class InfoWrapper { 37 private final byte[] mInfo; 38 InfoWrapper(byte[] info)39 public InfoWrapper(byte[] info) { 40 mInfo = info; 41 } 42 getInfo()43 public byte[] getInfo() { 44 return mInfo; 45 } 46 47 @Override equals(Object o)48 public boolean equals(Object o) { 49 if (!(o instanceof InfoWrapper)) { 50 return false; 51 } 52 InfoWrapper p = (InfoWrapper) o; 53 return Arrays.equals(this.mInfo, p.mInfo); 54 } 55 56 @Override hashCode()57 public int hashCode() { 58 return Arrays.hashCode(mInfo); 59 } 60 } 61 62 /** 63 * Returns the ID associated with the publisher info. When called for the first time for a 64 * publisher info will store the info and assign an ID 65 */ getIdForInfo(byte[] publisherInfo)66 public int getIdForInfo(byte[] publisherInfo) { 67 Integer publisherId; 68 InfoWrapper wrappedPublisherInfo = new InfoWrapper(publisherInfo); 69 synchronized (mLock) { 70 maybeAddPublisherInfoLocked(wrappedPublisherInfo); 71 publisherId = mPublishersIds.get(wrappedPublisherInfo); 72 } 73 if (DBG) { 74 Log.i(TAG, "Publisher ID is: " + publisherId); 75 } 76 return publisherId; 77 } 78 getPublisherInfo(int publisherId)79 public byte[] getPublisherInfo(int publisherId) { 80 synchronized (mLock) { 81 return mPublishersInfo.get(publisherId).clone(); 82 } 83 } 84 85 @GuardedBy("mLock") maybeAddPublisherInfoLocked(InfoWrapper wrappedPublisherInfo)86 private void maybeAddPublisherInfoLocked(InfoWrapper wrappedPublisherInfo) { 87 if (!mPublishersIds.containsKey(wrappedPublisherInfo)) { 88 // Assign ID to the info 89 Integer publisherId = mPublishersIds.size(); 90 91 mPublishersIds.put(wrappedPublisherInfo, publisherId); 92 mPublishersInfo.put(publisherId, wrappedPublisherInfo.getInfo()); 93 } 94 } 95 } 96 97