Configuration.ConfigHelper.java Source code

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Here is the source code for Configuration.ConfigHelper.java

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/*
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package Configuration;

import java.io.ByteArrayOutputStream;
import java.io.File;
import org.apache.commons.io.IOUtils;

/**
 *
 * @author estevo
 */

/*=================================================================
 | Interface:  ConfigHelper
 | Purpose: Search and return the database configuration file
 ===================================================================*/

public class ConfigHelper implements StaticConfiguration {

    public static File getConfigFile(String fileName) throws NoConfigFileFoundException {
        for (int i = 0; i < CONFIG_LOCATIONS.length; i++) {
            String location = CONFIG_LOCATIONS[i];
            if (location.startsWith("%HOME%")) {
                if (isUnix()) {
                    String home = getUserHome();
                    if (home == null || home.length() <= 0) {
                        continue;
                    }
                    location = location.replace("%HOME%", home);
                } else {
                    continue;
                }
            }
            File dir = new File(location);
            if (!dir.isDirectory() || !dir.exists()) {
                continue;
            }
            File configFile = new File(dir, fileName);
            if (!configFile.exists() || !configFile.canRead()) {
                continue;
            }
            return configFile;

        }
        throw new NoConfigFileFoundException();
    }

    public static String getUserHome() {
        String home = System.getProperty("user.home");
        if (home == null || home.length() <= 0) {
            try {
                Process exec = Runtime.getRuntime().exec(new String[] { "bash", "-c", "echo $HOME" });
                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                IOUtils.copy(exec.getInputStream(), baos);
                exec.getInputStream().close();
                home = baos.toString();
            } catch (Exception e) {
                return null;
            }
        }
        return home;
    }

    public static boolean isUnix() {
        String OS = System.getProperty("os.name").toLowerCase();

        return (OS.indexOf("nix") >= 0 || OS.indexOf("nux") >= 0 || OS.indexOf("") >= 0 || OS.indexOf("aix") >= 0);

    }
}