src/main/java/eu/svjatoslav/instantlauncher/Configuration.java

   1 package eu.svjatoslav.instantlauncher;
   2
   3 import java.io.File;
   4 import java.io.FileInputStream;
   5 import java.io.FileOutputStream;
   6 import java.io.IOException;
   7 import java.util.Properties;
   8
   9 public class Configuration {
  10
  11     private static final String KEY_ROOT_DIRECTORY = "KEY_ROOT_DIRECTORY";
  12     private static final String CONFIG_FILE_NAME = ".instantlauncher";
  13     private final Properties properties = new Properties();
  14
  15     private boolean propertiesChanged = false;
  16
  17     public Configuration() throws IOException {
  18         initialize();
  19     }
  20
  21     private File getPropertiesFile() {
  22         return new File(System.getProperty("user.home") + "/" + CONFIG_FILE_NAME);
  23     }
  24
  25     public File getRootDirectory() {
  26
  27         if (properties.containsKey(KEY_ROOT_DIRECTORY)) {
  28             return new File(properties.getProperty(KEY_ROOT_DIRECTORY));
  29         } else {
  30             properties.put(KEY_ROOT_DIRECTORY, System.getProperty("user.home") + "/");
  31             propertiesChanged = true;
  32             return getRootDirectory();
  33         }
  34
  35     }
  36
  37     private void initialize() throws IOException {
  38
  39         loadIfFileExists();
  40
  41         validatePropertiesFile();
  42
  43         if (propertiesChanged) {
  44             saveFile();
  45         }
  46     }
  47
  48     private void loadIfFileExists() throws IOException {
  49         final File propertiesFile = getPropertiesFile();
  50
  51         if (propertiesFile.exists()) {
  52             final FileInputStream inStream = new FileInputStream(propertiesFile);
  53             properties.load(inStream);
  54             inStream.close();
  55         }
  56     }
  57
  58     private void saveFile() throws IOException {
  59         properties.store(new FileOutputStream(getPropertiesFile()), "Instantlauncher configuration file.");
  60     }
  61
  62     private void validatePropertiesFile() {
  63         getRootDirectory();
  64     }
  65
  66 }