| /* |
| * Copyright (C) 2014 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.bluetooth.le; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| import android.util.Log; |
| |
| import java.nio.BufferOverflowException; |
| import java.nio.ByteBuffer; |
| import java.util.Arrays; |
| |
| /** |
| * Wrapper for Transport Discovery Data Transport Blocks. |
| * This class represents a Transport Block from a Transport Discovery Data. |
| * |
| * @see TransportDiscoveryData |
| * @see AdvertiseData |
| */ |
| public final class TransportBlock implements Parcelable { |
| private static final String TAG = "TransportBlock"; |
| private final int mOrgId; |
| private final int mTdsFlags; |
| private final int mTransportDataLength; |
| private final byte[] mTransportData; |
| |
| /** |
| * Creates an instance of TransportBlock from raw data. |
| * |
| * @param orgId the Organization ID |
| * @param tdsFlags the TDS flags |
| * @param transportDataLength the total length of the Transport Data |
| * @param transportData the Transport Data |
| */ |
| public TransportBlock(int orgId, int tdsFlags, int transportDataLength, |
| @Nullable byte[] transportData) { |
| mOrgId = orgId; |
| mTdsFlags = tdsFlags; |
| mTransportDataLength = transportDataLength; |
| mTransportData = transportData; |
| } |
| |
| private TransportBlock(Parcel in) { |
| mOrgId = in.readInt(); |
| mTdsFlags = in.readInt(); |
| mTransportDataLength = in.readInt(); |
| if (mTransportDataLength > 0) { |
| mTransportData = new byte[mTransportDataLength]; |
| in.readByteArray(mTransportData); |
| } else { |
| mTransportData = null; |
| } |
| } |
| |
| @Override |
| public void writeToParcel(@NonNull Parcel dest, int flags) { |
| dest.writeInt(mOrgId); |
| dest.writeInt(mTdsFlags); |
| dest.writeInt(mTransportDataLength); |
| if (mTransportData != null) { |
| dest.writeByteArray(mTransportData); |
| } |
| } |
| |
| /** |
| * @hide |
| */ |
| @Override |
| public int describeContents() { |
| return 0; |
| } |
| |
| /** |
| * @hide |
| */ |
| @Override |
| public boolean equals(@Nullable Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null || getClass() != obj.getClass()) { |
| return false; |
| } |
| TransportBlock other = (TransportBlock) obj; |
| return Arrays.equals(toByteArray(), other.toByteArray()); |
| } |
| |
| public static final @NonNull Creator<TransportBlock> CREATOR = new Creator<TransportBlock>() { |
| @Override |
| public TransportBlock createFromParcel(Parcel in) { |
| return new TransportBlock(in); |
| } |
| |
| @Override |
| public TransportBlock[] newArray(int size) { |
| return new TransportBlock[size]; |
| } |
| }; |
| |
| /** |
| * Gets the Organization ID of the Transport Block which corresponds to one of the |
| * the Bluetooth SIG Assigned Numbers. |
| */ |
| public int getOrgId() { |
| return mOrgId; |
| } |
| |
| /** |
| * Gets the TDS flags of the Transport Block which represents the role of the device and |
| * information about its state and supported features. |
| */ |
| public int getTdsFlags() { |
| return mTdsFlags; |
| } |
| |
| /** |
| * Gets the total number of octets in the Transport Data field in this Transport Block. |
| */ |
| public int getTransportDataLength() { |
| return mTransportDataLength; |
| } |
| |
| /** |
| * Gets the Transport Data of the Transport Block which contains organization-specific data. |
| */ |
| @Nullable |
| public byte[] getTransportData() { |
| return mTransportData; |
| } |
| |
| /** |
| * Converts this TransportBlock to byte array |
| * |
| * @return byte array representation of this Transport Block or null if the conversion failed |
| */ |
| @Nullable |
| public byte[] toByteArray() { |
| try { |
| ByteBuffer buffer = ByteBuffer.allocate(totalBytes()); |
| buffer.put((byte) mOrgId); |
| buffer.put((byte) mTdsFlags); |
| buffer.put((byte) mTransportDataLength); |
| if (mTransportData != null) { |
| buffer.put(mTransportData); |
| } |
| return buffer.array(); |
| } catch (BufferOverflowException e) { |
| Log.e(TAG, "Error converting to byte array: " + e.toString()); |
| return null; |
| } |
| } |
| |
| /** |
| * @return total byte count of this TransportBlock |
| */ |
| public int totalBytes() { |
| // 3 uint8 + byte[] length |
| int size = 3 + mTransportDataLength; |
| return size; |
| } |
| } |