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
17package android.nfc;
18
19import android.os.Parcel;
20import android.os.Parcelable;
21
22import java.io.IOException;
23
24/**
25 * Class used to pipe transceive result from the NFC service.
26 *
27 * @hide
28 */
29public final class TransceiveResult implements Parcelable {
30    public static final int RESULT_SUCCESS = 0;
31    public static final int RESULT_FAILURE = 1;
32    public static final int RESULT_TAGLOST = 2;
33    public static final int RESULT_EXCEEDED_LENGTH = 3;
34
35    final int mResult;
36    final byte[] mResponseData;
37
38    public TransceiveResult(final int result, final byte[] data) {
39        mResult = result;
40        mResponseData = data;
41    }
42
43    public byte[] getResponseOrThrow() throws IOException {
44        switch (mResult) {
45            case RESULT_SUCCESS:
46                return mResponseData;
47            case RESULT_TAGLOST:
48                throw new TagLostException("Tag was lost.");
49            case RESULT_EXCEEDED_LENGTH:
50                throw new IOException("Transceive length exceeds supported maximum");
51            default:
52                throw new IOException("Transceive failed");
53        }
54    }
55
56    @Override
57    public int describeContents() {
58        return 0;
59    }
60
61    @Override
62    public void writeToParcel(Parcel dest, int flags) {
63        dest.writeInt(mResult);
64        if (mResult == RESULT_SUCCESS) {
65            dest.writeInt(mResponseData.length);
66            dest.writeByteArray(mResponseData);
67        }
68    }
69
70    public static final Parcelable.Creator<TransceiveResult> CREATOR =
71            new Parcelable.Creator<TransceiveResult>() {
72        @Override
73        public TransceiveResult createFromParcel(Parcel in) {
74            int result = in.readInt();
75            byte[] responseData;
76
77            if (result == RESULT_SUCCESS) {
78                int responseLength = in.readInt();
79                responseData = new byte[responseLength];
80                in.readByteArray(responseData);
81            } else {
82                responseData = null;
83            }
84            return new TransceiveResult(result, responseData);
85        }
86
87        @Override
88        public TransceiveResult[] newArray(int size) {
89            return new TransceiveResult[size];
90        }
91    };
92
93}
94