Arthur Ishiguro | b9ae7bd | 2017-10-09 12:47:52 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 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 | package android.hardware.location; |
| 17 | |
Arthur Ishiguro | 1eef69f | 2018-11-08 15:17:11 -0800 | [diff] [blame] | 18 | import android.annotation.Nullable; |
Arthur Ishiguro | f2b6f01 | 2017-11-28 15:21:38 -0800 | [diff] [blame] | 19 | import android.annotation.SystemApi; |
Arthur Ishiguro | b9ae7bd | 2017-10-09 12:47:52 -0700 | [diff] [blame] | 20 | import android.os.Parcel; |
| 21 | import android.os.Parcelable; |
| 22 | |
Arthur Ishiguro | 1eef69f | 2018-11-08 15:17:11 -0800 | [diff] [blame] | 23 | import java.util.Arrays; |
| 24 | |
Arthur Ishiguro | b9ae7bd | 2017-10-09 12:47:52 -0700 | [diff] [blame] | 25 | /** |
| 26 | * A class describing messages send to or from nanoapps through the Context Hub Service. |
| 27 | * |
| 28 | * The basis of the class is in the IContextHub.hal ContextHubMsg definition. |
| 29 | * |
| 30 | * @hide |
| 31 | */ |
Arthur Ishiguro | f2b6f01 | 2017-11-28 15:21:38 -0800 | [diff] [blame] | 32 | @SystemApi |
Arthur Ishiguro | b9ae7bd | 2017-10-09 12:47:52 -0700 | [diff] [blame] | 33 | public final class NanoAppMessage implements Parcelable { |
Arthur Ishiguro | 1d3b23c | 2018-01-05 16:05:25 -0800 | [diff] [blame] | 34 | private static final int DEBUG_LOG_NUM_BYTES = 16; |
Arthur Ishiguro | b9ae7bd | 2017-10-09 12:47:52 -0700 | [diff] [blame] | 35 | private long mNanoAppId; |
| 36 | private int mMessageType; |
| 37 | private byte[] mMessageBody; |
| 38 | private boolean mIsBroadcasted; |
| 39 | |
| 40 | private NanoAppMessage( |
| 41 | long nanoAppId, int messageType, byte[] messageBody, boolean broadcasted) { |
| 42 | mNanoAppId = nanoAppId; |
| 43 | mMessageType = messageType; |
| 44 | mMessageBody = messageBody; |
| 45 | mIsBroadcasted = broadcasted; |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * Creates a NanoAppMessage object to send to a nanoapp. |
| 50 | * |
| 51 | * This factory method can be used to generate a NanoAppMessage object to be used in |
| 52 | * the ContextHubClient.sendMessageToNanoApp API. |
| 53 | * |
| 54 | * @param targetNanoAppId the ID of the nanoapp to send the message to |
| 55 | * @param messageType the nanoapp-dependent message type |
| 56 | * @param messageBody the byte array message contents |
| 57 | * |
| 58 | * @return the NanoAppMessage object |
| 59 | */ |
| 60 | public static NanoAppMessage createMessageToNanoApp( |
| 61 | long targetNanoAppId, int messageType, byte[] messageBody) { |
| 62 | return new NanoAppMessage( |
| 63 | targetNanoAppId, messageType, messageBody, false /* broadcasted */); |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * Creates a NanoAppMessage object sent from a nanoapp. |
| 68 | * |
| 69 | * This factory method is intended only to be used by the Context Hub Service when delivering |
| 70 | * messages from a nanoapp to clients. |
| 71 | * |
| 72 | * @param sourceNanoAppId the ID of the nanoapp that the message was sent from |
| 73 | * @param messageType the nanoapp-dependent message type |
| 74 | * @param messageBody the byte array message contents |
| 75 | * @param broadcasted {@code true} if the message was broadcasted, {@code false} otherwise |
| 76 | * |
| 77 | * @return the NanoAppMessage object |
| 78 | */ |
| 79 | public static NanoAppMessage createMessageFromNanoApp( |
| 80 | long sourceNanoAppId, int messageType, byte[] messageBody, boolean broadcasted) { |
| 81 | return new NanoAppMessage(sourceNanoAppId, messageType, messageBody, broadcasted); |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * @return the ID of the source or destination nanoapp |
| 86 | */ |
| 87 | public long getNanoAppId() { |
| 88 | return mNanoAppId; |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * @return the type of the message that is nanoapp-dependent |
| 93 | */ |
| 94 | public int getMessageType() { |
| 95 | return mMessageType; |
| 96 | } |
| 97 | |
| 98 | /** |
| 99 | * @return the byte array contents of the message |
| 100 | */ |
| 101 | public byte[] getMessageBody() { |
| 102 | return mMessageBody; |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * @return {@code true} if the message is broadcasted, {@code false} otherwise |
| 107 | */ |
| 108 | public boolean isBroadcastMessage() { |
| 109 | return mIsBroadcasted; |
| 110 | } |
| 111 | |
| 112 | private NanoAppMessage(Parcel in) { |
| 113 | mNanoAppId = in.readLong(); |
| 114 | mIsBroadcasted = (in.readInt() == 1); |
| 115 | mMessageType = in.readInt(); |
| 116 | |
| 117 | int msgSize = in.readInt(); |
| 118 | mMessageBody = new byte[msgSize]; |
| 119 | in.readByteArray(mMessageBody); |
| 120 | } |
| 121 | |
| 122 | @Override |
| 123 | public int describeContents() { |
| 124 | return 0; |
| 125 | } |
| 126 | |
| 127 | @Override |
| 128 | public void writeToParcel(Parcel out, int flags) { |
| 129 | out.writeLong(mNanoAppId); |
| 130 | out.writeInt(mIsBroadcasted ? 1 : 0); |
| 131 | out.writeInt(mMessageType); |
| 132 | |
| 133 | out.writeInt(mMessageBody.length); |
| 134 | out.writeByteArray(mMessageBody); |
| 135 | } |
| 136 | |
| 137 | public static final Creator<NanoAppMessage> CREATOR = |
| 138 | new Creator<NanoAppMessage>() { |
| 139 | @Override |
| 140 | public NanoAppMessage createFromParcel(Parcel in) { |
| 141 | return new NanoAppMessage(in); |
| 142 | } |
| 143 | |
| 144 | @Override |
| 145 | public NanoAppMessage[] newArray(int size) { |
| 146 | return new NanoAppMessage[size]; |
| 147 | } |
| 148 | }; |
Arthur Ishiguro | 1d3b23c | 2018-01-05 16:05:25 -0800 | [diff] [blame] | 149 | |
| 150 | @Override |
| 151 | public String toString() { |
| 152 | int length = mMessageBody.length; |
| 153 | |
| 154 | String ret = "NanoAppMessage[type = " + mMessageType + ", length = " + mMessageBody.length |
| 155 | + " bytes, " + (mIsBroadcasted ? "broadcast" : "unicast") + ", nanoapp = 0x" |
| 156 | + Long.toHexString(mNanoAppId) + "]("; |
| 157 | if (length > 0) { |
| 158 | ret += "data = 0x"; |
| 159 | } |
| 160 | for (int i = 0; i < Math.min(length, DEBUG_LOG_NUM_BYTES); i++) { |
| 161 | ret += Byte.toHexString(mMessageBody[i], true /* upperCase */); |
| 162 | |
| 163 | if ((i + 1) % 4 == 0) { |
| 164 | ret += " "; |
| 165 | } |
| 166 | } |
| 167 | if (length > DEBUG_LOG_NUM_BYTES) { |
| 168 | ret += "..."; |
| 169 | } |
| 170 | ret += ")"; |
| 171 | |
| 172 | return ret; |
| 173 | } |
Arthur Ishiguro | 1eef69f | 2018-11-08 15:17:11 -0800 | [diff] [blame] | 174 | |
| 175 | @Override |
| 176 | public boolean equals(@Nullable Object object) { |
| 177 | if (object == this) { |
| 178 | return true; |
| 179 | } |
| 180 | |
| 181 | boolean isEqual = false; |
| 182 | if (object instanceof NanoAppMessage) { |
| 183 | NanoAppMessage other = (NanoAppMessage) object; |
| 184 | isEqual = (other.getNanoAppId() == mNanoAppId) |
| 185 | && (other.getMessageType() == mMessageType) |
| 186 | && (other.isBroadcastMessage() == mIsBroadcasted) |
| 187 | && Arrays.equals(other.getMessageBody(), mMessageBody); |
| 188 | } |
| 189 | |
| 190 | return isEqual; |
| 191 | } |
Arthur Ishiguro | b9ae7bd | 2017-10-09 12:47:52 -0700 | [diff] [blame] | 192 | } |