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 android.nfc; 18 19 import android.os.Parcel; 20 import android.os.Parcelable; 21 22 import java.io.IOException; 23 24 /** 25 * Class used to pipe transceive result from the NFC service. 26 * 27 * @hide 28 */ 29 public 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 TransceiveResult(final int result, final byte[] data)38 public TransceiveResult(final int result, final byte[] data) { 39 mResult = result; 40 mResponseData = data; 41 } 42 getResponseOrThrow()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 describeContents()57 public int describeContents() { 58 return 0; 59 } 60 61 @Override writeToParcel(Parcel dest, int flags)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