com.github.pires.obd.commands.control.VinCommand Maven / Gradle / Ivy

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OBD Java API compatible with ELM327.

There is a newer version: 1.0

package com.github.pires.obd.commands.control;

import com.github.pires.obd.commands.PersistentCommand;
import com.github.pires.obd.enums.AvailableCommandNames;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class VinCommand extends PersistentCommand {

    String vin = "";

    /**
     * Default ctor.
     */
    public VinCommand() {
        super("09 02");
    }

    /**
     * Copy ctor.
     *
     * @param other a {@link com.github.pires.obd.commands.control.VinCommand} object.
     */
    public VinCommand(VinCommand other) {
        super(other);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void performCalculations() {
        final String result = getResult();
        String workingData;
        if (result.contains(":")) {//CAN(ISO-15765) protocol.
            workingData = result.replaceAll(".:", "").substring(9);//9 is xxx490201, xxx is bytes of information to follow.
            Matcher m = Pattern.compile("[^a-z0-9 ]", Pattern.CASE_INSENSITIVE).matcher(convertHexToString(workingData));
            if(m.find()) workingData = result.replaceAll("0:49", "").replaceAll(".:", "");
        } else {//ISO9141-2, KWP2000 Fast and KWP2000 5Kbps (ISO15031) protocols.
            workingData = result.replaceAll("49020.", "");
        }
        vin = convertHexToString(workingData).replaceAll("[\u0000-\u001f]", "");
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public String getFormattedResult() {
        return String.valueOf(vin);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public String getName() {
        return AvailableCommandNames.VIN.getValue();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public String getCalculatedResult() {
        return String.valueOf(vin);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void fillBuffer() {
    }

    public String convertHexToString(String hex) {
        StringBuilder sb = new StringBuilder();
        //49204c6f7665204a617661 split into two characters 49, 20, 4c...
        for (int i = 0; i < hex.length() - 1; i += 2) {

            //grab the hex in pairs
            String output = hex.substring(i, (i + 2));
            //convert hex to decimal
            int decimal = Integer.parseInt(output, 16);
            //convert the decimal to character
            sb.append((char) decimal);
        }
        return sb.toString();
    }
}