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/*
* Copyright 2015 Anton Tananaev (anton@traccar.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.traccar.protocol;
import org.traccar.BaseProtocolEncoder;
import org.traccar.Context;
import org.traccar.helper.Checksum;
import org.traccar.model.Command;
public class PretraceProtocolEncoder extends BaseProtocolEncoder {
private String formatCommand(String uniqueId, String data) {
String content = uniqueId + data;
return String.format("(%s^%02X)", content, Checksum.xor(content));
}
@Override
protected Object encodeCommand(Command command) {
String uniqueId = Context.getIdentityManager().getById(command.getDeviceId()).getUniqueId();
switch (command.getType()) {
case Command.TYPE_CUSTOM:
return formatCommand(uniqueId, command.getString(Command.KEY_DATA));
case Command.TYPE_POSITION_PERIODIC:
return formatCommand(
uniqueId, String.format("D221%1$d,%1$d,,", command.getInteger(Command.KEY_FREQUENCY)));
default:
return null;
}
}
}
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