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/*
* Copyright 2015 - 2019 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;
import org.traccar.model.Command;
public abstract class StringProtocolEncoder extends BaseProtocolEncoder {
public StringProtocolEncoder(Protocol protocol) {
super(protocol);
}
public interface ValueFormatter {
String formatValue(String key, Object value);
}
protected String formatCommand(Command command, String format, ValueFormatter valueFormatter, String... keys) {
Object[] values = new String[keys.length];
for (int i = 0; i < keys.length; i++) {
String value = null;
if (keys[i].equals(Command.KEY_UNIQUE_ID)) {
value = getUniqueId(command.getDeviceId());
} else {
Object object = command.getAttributes().get(keys[i]);
if (valueFormatter != null) {
value = valueFormatter.formatValue(keys[i], object);
}
if (value == null && object != null) {
value = object.toString();
}
if (value == null) {
value = "";
}
}
values[i] = value;
}
return String.format(format, values);
}
protected String formatCommand(Command command, String format, String... keys) {
return formatCommand(command, format, null, keys);
}
}
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