GPSSensorController.java

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package project.latex.balloon.sensor.gps;

import project.latex.balloon.sensor.SensorReadFailedException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.apache.log4j.Logger;
import project.latex.balloon.sensor.SensorController;

/**
 *
 * @author will
 */
public class GPSSensorController implements SensorController {

    private static final Logger logger = Logger.getLogger(GPSSensorController.class);
    private final UBloxGPSSensor gps;
    private final ArrayList<String> keys = new ArrayList<>();

    public GPSSensorController(UBloxGPSSensor gps, List<String> keys) {
        this.keys.addAll(keys);
        this.gps = gps;
    }

    @Override
    public HashMap<String, Object> getCurrentData() throws SensorReadFailedException {
        HashMap<String, Object> requestedData = new HashMap<>();
        HashMap<String, String> allData = new HashMap<>();

        // Get and parse all data from all supported sentence types. 
        allData = PolledSentenceParser.parse(gps.getPolledSentence());

        // Match this controllers keys to the keys in allData and collect together 
        // the data corrsponding to matching keys.
        for (String key : keys) {
            if (allData.get(key) == null) {
                logger.info("Data not available for key: " + key);
            } else {
                requestedData.put(key, allData.get(key));
            }
        }

        return requestedData;
    }
}