/**
* Copyright 2011 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.ndef.wkt.handover.encoder;
import org.nfctools.ndef.NdefEncoderException;
import org.nfctools.ndef.NdefMessageEncoder;
import org.nfctools.ndef.wkt.WellKnownRecordPayloadEncoder;
import org.nfctools.ndef.wkt.handover.records.ErrorRecord;
import org.nfctools.ndef.wkt.handover.records.ErrorRecord.ErrorReason;
import org.nfctools.ndef.wkt.records.WellKnownRecord;
/**
*
* @author Thomas Rorvik Skjolberg (skjolber@gmail.com)
*
*/
public class ErrorRecordEncoder implements WellKnownRecordPayloadEncoder {
@Override
public byte[] encodePayload(WellKnownRecord wellKnownRecord, NdefMessageEncoder messageEncoder) {
ErrorRecord errorRecord = (ErrorRecord)wellKnownRecord;
if (!errorRecord.hasErrorReason()) {
throw new NdefEncoderException("Expected error reason", wellKnownRecord);
}
if (!errorRecord.hasErrorData()) {
throw new NdefEncoderException("Expected error data", wellKnownRecord);
}
ErrorReason errorReason = errorRecord.getErrorReason();
switch (errorReason) {
case TemporaryMemoryConstraints: {
/**
* An 8-bit unsigned integer that expresses the minimum number of milliseconds after which a Handover
* Request Message with the same number of octets might be processed successfully. The number of
* milliseconds SHALL be determined by the time interval between the sending of the error indication and
* the subsequent receipt of a Handover Request Message by the Handover Selector.
*/
return new byte[] { errorReason.getValue(), (byte)(errorRecord.getErrorData().shortValue() & 0xFF) };
}
case PermanenteMemoryConstraints: {
/**
* A 32-bit unsigned integer, encoded with the most significant byte first, that indicates the maximum
* number of octets of an acceptable Handover Select Message. The number of octets SHALL be determined
* by the total length of the NDEF message, including all header information.
*/
long unsignedInt = errorRecord.getErrorData().longValue();
return new byte[] { errorReason.getValue(), (byte)((unsignedInt >> 24) & 0xFF),
(byte)((unsignedInt >> 16) & 0xFF), (byte)((unsignedInt >> 8) & 0xFF),
(byte)(unsignedInt & 0xFF) };
}
case CarrierSpecificConstraints: {
/**
* An 8-bit unsigned integer that expresses the minimum number of milliseconds after which a Handover
* Request Message might be processed successfully. The number of milliseconds SHALL be determined by
* the time interval between the sending of the error indication and the subsequent receipt of a
* Handover Request Message by the Handover Selector.
*/
return new byte[] { errorReason.getValue(), (byte)(errorRecord.getErrorData().shortValue() & 0xFF) };
}
}
throw new NdefEncoderException("Unknown error reason " + errorReason, wellKnownRecord);
}
}