TempStream.java

/**
 * Copyright 2012 Kevin J. Jones (http://www.kevinjjones.co.uk)
 *
 * 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 uk.co.kevinjjones.vehicle;

import uk.co.kevinjjones.Log;
import uk.co.kevinjjones.model.*;

/**
 * Temperature virtual stream
 */
public class TempStream extends StreamBase {

    public static int DEGC = 1;
    public static int DEGF = 2;
    private static int _isDegC = 0;

    private static boolean isDegC(ROStream s) {
        if (_isDegC != 0) {
            return _isDegC == DEGC;
        }

        DoubleSampler ds = new DoubleSampler(-100.0, 500.0, 12);
        Distribution<Double> d = new Distribution<Double>(ds);
        d.sample(s.toArray());

        // If DegC we should not see > 150
        int b = 5;
        for (; b < 12; b++) {
            if (d.samples(b) > 0) {
                break;
            }
        }
        if (b >= 12) {
            _isDegC = DEGC;
        } else {
            _isDegC = DEGF;
        }

        return _isDegC == DEGC;
    }
    public final static int WATER = 1;
    public final static int OIL = 2;
    public final static int AIR = 3;
    public final static String WATER_NAME = "Water Temp";
    public final static String OIL_NAME = "Oil Temp";
    public final static String AIR_NAME = "Air Temp";

    public static String name(int index) {
        switch (index) {
            case WATER:
                return WATER_NAME;
            case OIL:
                return OIL_NAME;
            case AIR:
                return AIR_NAME;

        }
        return null;
    }
    private View _view;
    private int _type = -1;
    private ROStream _stream;

    public TempStream() {
    }

    @Override
    public void setView(View view, Object arg, ParamHandler handler, WithError<Boolean, BasicError> ok) {
        _view = view;
        _type = ((Integer) arg).intValue();
        assert (_type >= 1 && _type <= 3);

        switch (_type) {
            case WATER:
                _stream = _view.getStream(Log.WATER_STREAM);
                break;
            case OIL:
                _stream = _view.getStream(Log.OILT_STREAM);
                break;
            case AIR:
                _stream = _view.getStream(Log.AIR_STREAM);
                break;
        }

        if (_stream == null) {
            ok.setValue(false);
        } else {
            _stream.setMeta("hide", "true");
        }
        isDegC(_stream);
    }

    @Override
    public String name() {
        return name(_type);
    }

    @Override
    public String description() {
        return name();
    }

    @Override
    public String axis() {
        return "Temperature";
    }

    @Override
    public String units() {
        if (isDegC(_stream)) {
            return "\u00B0C";
        } else {
            return "\u00B0F";
        }
    }

    @Override
    public int size() {
        return _view.getStream(Log.TIME_STREAM).size();
    }

    @Override
    public double getNumeric(int position) throws NumberFormatException {
        return _stream.getNumeric(position);
    }
}