/*
* (C) Copyright 2015 by fr3ts0n <erwin.scheuch-heilig@gmx.at>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
package com.fr3ts0n.ecu;
import com.fr3ts0n.pvs.PvLimits;
/**
* Definition of a single OBD data conversion
*
* @author erwin
*/
public class LinearConversion extends NumericConversion
{
/**
*
*/
private static final long serialVersionUID = 7409621816599441879L;
int factor = 1;
int divider = 1;
int offset = 0;
int offsetPhys = 0;
PvLimits limits = null;
/**
* Creates a new instance of Conversion
*/
public LinearConversion()
{
}
/**
* Creates a new instance of Conversion
*
* @param factor conversion factor (integer part)
* @param divider conversion divider (integer part)
* @param offset linear offset to be added to raw memory value before conversion
* @param offsetPhys physical offset to be added after converting raw value
* @param units physical units for this conversion
*/
public LinearConversion(int factor, int divider, int offset, int offsetPhys,
String units)
{
this.offset = offset;
this.factor = factor;
this.divider = divider;
this.offsetPhys = offsetPhys;
this.units = units;
}
/**
* Creates a new instance of Conversion
*
* @param factor conversion factor (integer part)
* @param divider conversion divider (integer part)
* @param offset linear offset to be added to raw memory value before conversion
* @param offsetPhys physical offset to be added after converting raw value
* @param units physical units for this conversion
*/
public LinearConversion(int factor, int divider, int offset, int offsetPhys,
String units, PvLimits limits)
{
this(factor, divider, offset, offsetPhys, units);
this.limits = limits;
}
/**
* convert measurement item from storage format to physical value
*
* @param value raw memory value to be converted
*/
public Number memToPhys(long value)
{
float result = ((float) (value + offset) * factor / divider + offsetPhys);
if (limits != null)
{
result = (Float) limits.limitedValue(result);
}
return result;
}
/**
* convert measurement item from physical value to raw storage format
*
* @param value physical value to be converted
*/
public Number physToMem(Number value)
{
return ((long) java.lang.Math.round((value.floatValue() - offsetPhys)
* divider / factor - offset));
}
}