/**
* Copyright 2011-2012 Adrian Stabiszewski, as@nfctools.org
*
* 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 org.nfctools.spi.acs;
import java.io.IOException;
import org.nfctools.api.ApduTag;
import org.nfctools.io.ByteArrayReader;
import org.nfctools.io.ByteArrayWriter;
import org.nfctools.scio.Command;
import org.nfctools.scio.Response;
import org.nfctools.utils.NfcUtils;
public class ApduTagReaderWriter implements ByteArrayReader, ByteArrayWriter {
private byte[] responseData;
private final ApduTag apduTag;
public ApduTagReaderWriter(ApduTag apduTag) {
this.apduTag = apduTag;
}
@Override
public void write(byte[] data, int offset, int length) throws IOException {
Command command = new Command(data, offset, length);
Response response = apduTag.transmit(command);
responseData = response.getData();
if (!response.isSuccess())
throw new ApduException("Error sending message [" + NfcUtils.convertBinToASCII(data) + "] (" + offset + ","
+ length + ") => [SW1: " + response.getSw1() + ", SW2:" + response.getSw2() + ", Data: "
+ NfcUtils.convertBinToASCII(responseData) + "]");
}
@Override
public void setTimeout(long millis) {
}
@Override
public int read(byte[] data, int offset, int length) throws IOException {
if (responseData.length > length - offset)
throw new IllegalArgumentException("buffer too small for response, needed " + responseData.length
+ " bytes");
System.arraycopy(responseData, 0, data, offset, responseData.length);
return responseData.length;
}
}