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/*
* Copyright (C) 2010 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.
*/
/**
* File : NDEFTag.java
* Original-Author : Trusted Logic S.A. (Jeremie Corbier)
* Created : 04-12-2009
*/
package com.trustedlogic.trustednfc.android;
import java.io.IOException;
import android.os.RemoteException;
import android.util.Log;
/**
* NdefTag represents tags complying with the NFC Forum's NFC Data Exchange
* Format.
*
* @since AA01.04
* @hide
*/
public class NdefTag extends NfcTag {
private static final String TAG = "NdefTag";
public NdefTag(NfcTag tag){
super(tag.mService,tag.mHandle);
this.isConnected = tag.isConnected;
this.isClosed = tag.isClosed;
tag.isClosed = false;
}
/**
* Internal constructor for the NfcNdefTag class.
*
* @param service The entry point to the Nfc Service for NfcNdefTag class.
* @param handle The handle returned by the NFC service and used to identify
* the tag in subsequent calls.
* @hide
*/
NdefTag(INfcTag service, int handle) {
super(service, handle);
}
/**
* Read NDEF data from an NDEF tag.
*
* @return the NDEF message read from the tag.
* @throws NfcException if the tag is not NDEF-formatted.
* @throws IOException if the target has been lost or the connection has
* been closed.
* @see NdefMessage
*/
public NdefMessage read() throws NfcException, IOException {
// Check state
checkState();
//Check if the tag is Ndef compliant
if(isNdef != true){
isNdef = isNdef();
if(isNdef != true) {
throw new NfcException("Tag is not NDEF compliant");
}
}
// Perform transceive
try {
NdefMessage msg = mService.read(mHandle);
if (msg == null) {
throw new IOException("NDEF read failed");
}
return msg;
} catch (RemoteException e) {
Log.e(TAG, "RemoteException in read(): ", e);
return null;
}
}
/**
* Write NDEF data to an NDEF-compliant tag.
*
* @param msg NDEF message to be written to the tag.
* @throws NfcException if the tag is not NDEF formatted.
* @throws IOException if the target has been lost or the connection has
* been closed.
* @see NdefMessage
*/
public void write(NdefMessage msg) throws NfcException, IOException {
// Check state
checkState();
//Check if the tag is Ndef compliant
if(isNdef != true){
isNdef = isNdef();
if(isNdef != true) {
throw new NfcException("Tag is not NDEF compliant");
}
}
// Perform transceive
try {
boolean isSuccess = mService.write(mHandle, msg);
if (!isSuccess) {
throw new IOException("NDEF write failed");
}
} catch (RemoteException e) {
Log.e(TAG, "RemoteException in write(): ", e);
}
}
}
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