ConfigParser.java

package cz.cvut.fel.restauracefel.library.service;

import java.io.File;
import java.io.FileNotFoundException;
import org.w3c.dom.Document;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

/**
 * Servisni trida. Slouzi pro nacitani konfiguracnich dat z XML souroru.
 *
 * @author Jarda
 */
public class ConfigParser {

    private File file = null;
    private DocumentBuilder db = null;
    private Document doc = null;
    private String configFileNS = "";

    private static String configFile = "config"+System.getProperty("file.separator")+"config.xml";

    /**
     * Konstruktor tridy ConfigParser. Cesta ke konfiguracnimu souboru je urcena
     * ve staticke promenne "configFile".
     *
     * @throws FileNotFoundException
     */
    public ConfigParser() throws FileNotFoundException {
        file = new File(configFile);
        if (!file.exists()) {
            throw new FileNotFoundException("Soubor "+ file.getPath() +" nebyl nalezen.");
        }
        try {
            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            db = dbf.newDocumentBuilder();
            doc = db.parse(file);
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    /**
     * Metoda navraci relativni cestu ke konfiguracnimu souboru.
     *
     * @return relativni cesta ke konfiguracnimu souboru
     */
    public static String getConfigFile(){
        return ConfigParser.configFile;
    }

    public static void setConfigFile(String configFile){
        ConfigParser.configFile = configFile;
    }

    /**
     * Metoda navraci cestu ke konfiguracnimu souboru.
     *
     * @return cesta ke konfiguracnimu souboru
     */
    public String getAbsoluteConfigFilePath(){
        return file.getAbsolutePath();
    }

    /**
     * Metoda cte element se jmenem uvedenem jako parametr teto metody.
     *
     * @param tagName nazev elementu XML souboru
     * @return Obsah daneho elementu.
     */
    private String getValue(String tagName) throws FileNotFoundException {
        if (!file.exists()) throw new FileNotFoundException("Soubor "+ file.getPath() +" nebyl nalezen.");
        try {
            doc = db.parse(file);
        } catch (Exception e) {
            e.printStackTrace();
        }
        NodeList elems = doc.getElementsByTagName(tagName);
        Node node = elems.item(0);
        return node.getTextContent();
    }

    /**
     * Konstruktor tridy ConfigParser. Cesta ke konfiguracnimu souboru je urcena
     * ve staticke promenne "configFileNS".
     *
     * @param path cesta ke konfiguracnimu souboru
     * @throws FileNotFoundException
     */
    public ConfigParser(String path) throws FileNotFoundException {
        this.configFileNS = path;
        file = new File(configFileNS);
        if (!file.exists()) {
            throw new FileNotFoundException("Soubor " + file.getPath() + " nebyl nalezen.");
        }
        try {
            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            db = dbf.newDocumentBuilder();
            doc = db.parse(file);
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    /**
     * Metoda zapisuje do elementu "tagName" hodnotu "value".
     *
     * @param tagName nazev elementu
     * @param value hodnota, ktera se na zapsat do elementu
     * @throws java.io.FileNotFoundException
     * @throws java.lang.Exception
     */
    private void writeValue(String tagName, String value) throws FileNotFoundException, Exception {
        //if (!file.exists()) throw new FileNotFoundException("Soubor "+ file.getPath() +" nebyl nalezen.");
        NodeList elems = doc.getElementsByTagName(tagName);
        Node node = elems.item(0);
        node.setTextContent(value);
        TransformerFactory tf = TransformerFactory.newInstance();
        Transformer writer = tf.newTransformer();
        writer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
        writer.transform(new DOMSource(doc), new StreamResult(configFile));
    }

    /**
     * Metoda navraci informaci o pouzivane mene v ramci klienta.
     *
     * @return String retezec udavajici pouzivanou menu.
     * @throws java.io.FileNotFoundException
     */
    public String getMoney() throws FileNotFoundException {
        return getValue("money");
    }

    /**
     * Metoda navraci IP adresu primarniho serveru.
     *
     * @return
     * @throws java.io.FileNotFoundException
     */
    public String getPrimaryServerIP() throws FileNotFoundException {
        return getValue("primaryServerIP");
    }

    /**
     * Metoda navraci IP adresu sekundarniho serveru.
     *
     * @return
     * @throws java.io.FileNotFoundException
     */
    public String getSecondaryServerIP() throws FileNotFoundException {
        return getValue("secondaryServerIP");
    }

    /**
     * Metoda navraci cestu k adresari s tiskovymi sestavami.
     *
     * @return cesta k adresari se sestavami
     * @throws java.io.FileNotFoundException
     */
    public String getTemplatesDir() throws FileNotFoundException {
        return getValue("printingTemplatesDir");
    }

    /**
     * Metoda vraci zpusob komunikace s vahou (viz EnumScaleCommunicatorType)
     * @return zpusob komuniukace s vahou
     * @throws FileNotFoundException
     */
    public String getScaleType() throws FileNotFoundException {
        return getValue("scaletype");
    }
    
    /**
     * Metoda vraci cislo com portu.
     *
     * @return cislo com portu
     * @throws java.io.FileNotFoundException
     */
    public String getCom() throws FileNotFoundException {
        return getValue("com");
    }

    /**
     * Metoda vraci nastaveny baudrate pro com port
     * @return baudrate pro com port
     * @throws FileNotFoundException
     */
    public String getBaudrate() throws FileNotFoundException {
        return getValue("baudrate");
    }

    /**
     * Metoda vraci nastavene databits pro com port
     * @return databits pro com port
     * @throws FileNotFoundException
     */
    public String getDatabits() throws FileNotFoundException {
        return getValue("databits");
    }

    /**
     * Metoda vraci nastavene paritybits pro com port
     * @return paritybits pro com port
     * @throws FileNotFoundException
     */
    public String getParitybits() throws FileNotFoundException {
        return getValue("paritybits");
    }

    /**
     * Metoda vraci nastavene stopbits pro com port
     * @return stopbits pro com port
     * @throws FileNotFoundException
     */
    public String getStopbits() throws FileNotFoundException {
        return getValue("stopbits");
    }

    /**
     * Metoda zapisujici pouzivanou menu.
     *
     * @param money nazev (pripadne zkratka) pouzivane meny
     * @throws java.io.FileNotFoundException
     * @throws java.lang.Exception
     */
    public void setMoney(String money) throws FileNotFoundException, Exception {
        writeValue("money", money);
    }

    /**
     * Metoda zapisujici IP adresu primarniho serveru.
     *
     * @param serverIP IP adresa primarniho serveru
     * @throws java.io.FileNotFoundException
     * @throws java.lang.Exception
     */
    public void setPrimaryServerIP(String serverIP) throws FileNotFoundException, Exception {
        writeValue("primaryServerIP", serverIP);
    }

    /**
     * Metoda zapisujici IP adresu sekundarniho (zalozniho serveru).
     *
     * @param serverIP IP adresa sekundarniho serveru
     * @throws java.io.FileNotFoundException
     * @throws java.lang.Exception
     */
    public void setSecondaryServerIP(String serverIP) throws FileNotFoundException, Exception {
        writeValue("secondaryServerIP", serverIP);
    }

    /**
     * Metoda zapisujici cestu k adresari obsahujicimu tiskove sestavy.
     *
     * @param dir adresar s tiskovymi sestavami
     * @throws java.io.FileNotFoundException
     * @throws java.lang.Exception
     */
    public void setTemplatesDir(String dir) throws FileNotFoundException, Exception {
        writeValue("printingTemplatesDir", dir);
    }

    /**
     * Metoda nastavuje zpusob komunikace s vahou (prozatim je jedina moznost pres COM port)
     * @param scaleType zpusob komunikace
     * @throws FileNotFoundException
     * @throws Exception
     */
    public void setScaleType(String scaleType) throws FileNotFoundException, Exception {
        writeValue("scaletype", scaleType);
    }
    /**
     * Metoda zapisuje com port
     *
     * @param com port (napr. COM1)
     * @throws java.io.FileNotFoundException
     * @throws java.lang.Exception
     */
    public void setCom(String com) throws FileNotFoundException, Exception {
        writeValue("com", com);
    }

    /**
     * Metoda nastavuje baudrate pro com port.
     * @param baudrate baudrate pro com port
     * @throws FileNotFoundException
     * @throws Exception
     */
    public void setBaudrate(String baudrate) throws FileNotFoundException, Exception {
        writeValue("baudrate", baudrate);
    }

    /**
     * Metoda nastavuje databits pro com port
     * @param databits databits pro com port
     * @throws FileNotFoundException
     * @throws Exception
     */
    public void setDatabits(String databits) throws FileNotFoundException, Exception {
        writeValue("databits", databits);
    }

    /**
     * Metoda nastavuje paritybits pro com port
     * @param databits paritybits pro com port
     * @throws FileNotFoundException
     * @throws Exception
     */
    public void setParitybits(String paritybits) throws FileNotFoundException, Exception {
        writeValue("paritybits", paritybits);
    }

    /**
     * Metoda nastavuje stopbits pro com port
     * @param databits stopbits pro com port
     * @throws FileNotFoundException
     * @throws Exception
     */
    public void setStopbits(String stopbits) throws FileNotFoundException, Exception {
        writeValue("stopbits", stopbits);
    }

    /**
     * Metoda navraci relativni cestu ke konfiguracnimu souboru.
     *
     * @return relativni cesta ke konfiguracnimu souboru
     */
    public String getConfigFileNS() {
        return configFileNS;
    }

    public void setConfigFileNS(String configFile) {
        this.configFileNS = configFile;
    }


    /**
     * Metoda navraci IP adresu na ktere server pobezi serveru.
     *
     * @return
     * @throws java.io.FileNotFoundException
     */
    public String getServerIP() throws FileNotFoundException {
        return getValue("serverIP");
    }

}