WheelStream.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.*;

/**
 * Wheel virtual stream
 */
public class WheelStream extends StreamBase {

    public final static int LUSP = 0;
    public final static int RUSP = 1;
    public final static int LDSP = 2;
    public final static int RDSP = 3;

    public static String name(int index) {
        switch (index) {
            case LUSP:
                return "Left undriven wheel";
            case RUSP:
                return "Right undriven wheel";
            case LDSP:
                return "Left driven wheel";
            case RDSP:
                return "Right driven wheel";
        }
        return null;
    }
    private View _view;
    private int _wheel = -1;
    private ROStream _stream;

    public WheelStream() {
    }

    @Override
    public void setView(View view, Object arg, ParamHandler handler, WithError<Boolean, BasicError> ok) {
        super.setView(view, arg, handler, ok);
        _view = view;
        _wheel = ((Integer) arg).intValue();
        assert (_wheel >= 0 && _wheel < 4);

        switch (_wheel) {
            case LUSP:
                _stream = new SmoothStream(_view.getStream(Log.LUSP_STREAM));
                break;
            case RUSP:
                _stream = new SmoothStream(_view.getStream(Log.RUSP_STREAM));
                break;
            case LDSP:
                _stream = new SmoothStream(_view.getStream(Log.LDSP_STREAM));
                break;
            case RDSP:
                _stream = new SmoothStream(_view.getStream(Log.RDSP_STREAM));
                break;
        }
        if (_stream == null) {
            ok.setValue(false);
            return;
        }

        // Check for zero stream
        for (int i = 0; i < size(); i++) {
            if (getNumeric(i) != 0) {
                _stream.setMeta("hide", "true");
                return;
            }
        }

        ok.addError(new BasicError(BasicError.WARN, name() + " trace is present but does did not record any values, ignoring it."));
        ok.setValue(false);
    }

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

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

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

    @Override
    public String units() {
        switch (isKPH(false)) {
            case 1:
                return "kph";
            case 2:
                return "mph";
        }
        return null;
    }

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