EcuParameterConvertorImpl.java

/*
 * RomRaider Open-Source Tuning, Logging and Reflashing
 * Copyright (C) 2006-2015 RomRaider.com
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

package com.romraider.logger.ecu.definition;

import static com.romraider.logger.ecu.definition.xml.ConverterMaxMinDefaults.getDefault;
import static com.romraider.util.ByteUtil.asUnsignedInt;
import static com.romraider.util.JEPUtil.evaluate;
import static com.romraider.util.ParamChecker.checkNotNull;
import static com.romraider.util.ParamChecker.checkNotNullOrEmpty;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.text.DecimalFormat;
import java.util.HashMap;
import java.util.Map;

import com.romraider.Settings;
import com.romraider.logger.ecu.ui.handler.dash.GaugeMinMax;

public final class EcuParameterConvertorImpl implements EcuDataConvertor {
    private static final String FLOAT = "float";
    private static final String UINT = "uint";
    private final String units;
    private final String expression;
    private final DecimalFormat format;
    private final int bit;
    private final String dataType;
    private final int endian;
    private final Map<String, String> replaceMap;
    private final GaugeMinMax gaugeMinMax;

    public EcuParameterConvertorImpl() {
        this("Raw data", "x", "0", -1, "uint", Settings.ENDIAN_BIG,
                new HashMap<String, String>(), getDefault());
    }

    public EcuParameterConvertorImpl(String units, String expression,
            String format, int bit, String dataType, int endian,
            Map<String, String> replaceMap, GaugeMinMax gaugeMinMax) {

        checkNotNullOrEmpty(units, "units");
        checkNotNullOrEmpty(expression, "expression");
        checkNotNullOrEmpty(format, "format");
        checkNotNull(replaceMap, "replaceMap");
        this.units = units;
        this.expression = expression;
        this.format = new DecimalFormat(format);
        this.bit = bit;
        this.dataType = (dataType == null ? "uint8" : dataType);
        this.endian = endian;
        this.replaceMap = replaceMap;
        this.gaugeMinMax = gaugeMinMax;
    }

    public double convert(byte[] bytes) {
        final ByteBuffer bb = ByteBuffer.wrap(bytes);
        if (endian == Settings.ENDIAN_LITTLE) {
            bb.order(ByteOrder.LITTLE_ENDIAN);
        }

        double result = 0;
        if (bit >= 0 && bit <= 31) {
            return (asUnsignedInt(bytes) & (1 << bit)) != 0 ? 1 : 0;
        }
        else if (dataType.equalsIgnoreCase(FLOAT)) {
            result = evaluate(expression, bb.getFloat());
        }
        else {
            long value = 0;
            switch (bb.capacity()) {
                case 1:
                    value = bb.get();
                    break;
                case 2:
                    value = bb.getShort();
                    break;
                case 4:
                    value = bb.getInt();
                    break;
            }
            if (dataType.toLowerCase().startsWith(UINT)) {
                switch (bb.capacity()) {
                    case 1:
                        value = value & 0xff;
                        break;
                    case 2:
                        value = value & 0xffff;
                        break;
                    case 4:
                        value = value & 0xffffffffL;
                        break;
                }
            }
            result = evaluate(expression, value);
        }
        return Double.isNaN(result) || Double.isInfinite(result) ? 0.0 : result;
    }

    public String getUnits() {
        return units;
    }

    public GaugeMinMax getGaugeMinMax() {
        return gaugeMinMax;
    }

    public String getFormat() {
        return format.toPattern();
    }

    public String format(double value) {
        String formattedValue = format.format(value);
        if (replaceMap.containsKey(formattedValue)) {
            return replaceMap.get(formattedValue);
        } else {
            return formattedValue;
        }
    }

    public String toString() {
        return getUnits();
    }

    public String getExpression() {
        return expression;
    }

    @Override
    public String getDataType() {
        return dataType;
    }
}