Examples of java.io.File$LazyInitialization

java.io.File
An abstract representation of file and directory pathnames.
User interfaces and operating systems use system-dependent pathname strings to name files and directories. This class presents an abstract, system-independent view of hierarchical pathnames. An abstract pathname has two components:
1. An optional system-dependent prefix string, such as a disk-drive specifier, "/" for the UNIX root directory, or "\\\\" for a Microsoft Windows UNC pathname, and
2. A sequence of zero or more string names.
The first name in an abstract pathname may be a directory name or, in the case of Microsoft Windows UNC pathnames, a hostname. Each subsequent name in an abstract pathname denotes a directory; the last name may denote either a directory or a file. The empty abstract pathname has no prefix and an empty name sequence.
The conversion of a pathname string to or from an abstract pathname is inherently system-dependent. When an abstract pathname is converted into a pathname string, each name is separated from the next by a single copy of the default separator character. The default name-separator character is defined by the system property file.separator, and is made available in the public static fields {@link #separator} and {@link #separatorChar} of this class. When a pathname string is converted into an abstract pathname, the names within it may be separated by the default name-separator character or by any other name-separator character that is supported by the underlying system.
A pathname, whether abstract or in string form, may be either absolute or relative. An absolute pathname is complete in that no other information is required in order to locate the file that it denotes. A relative pathname, in contrast, must be interpreted in terms of information taken from some other pathname. By default the classes in the java.io package always resolve relative pathnames against the current user directory. This directory is named by the system property user.dir, and is typically the directory in which the Java virtual machine was invoked.
The parent of an abstract pathname may be obtained by invoking the {@link #getParent} method of this class and consists of the pathname'sprefix and each name in the pathname's name sequence except for the last. Each directory's absolute pathname is an ancestor of any File object with an absolute abstract pathname which begins with the directory's absolute pathname. For example, the directory denoted by the abstract pathname "/usr" is an ancestor of the directory denoted by the pathname "/usr/local/bin".
The prefix concept is used to handle root directories on UNIX platforms, and drive specifiers, root directories and UNC pathnames on Microsoft Windows platforms, as follows:
- For UNIX platforms, the prefix of an absolute pathname is always "/". Relative pathnames have no prefix. The abstract pathname denoting the root directory has the prefix "/" and an empty name sequence.
- For Microsoft Windows platforms, the prefix of a pathname that contains a drive specifier consists of the drive letter followed by ":" and possibly followed by "\\" if the pathname is absolute. The prefix of a UNC pathname is "\\\\"; the hostname and the share name are the first two names in the name sequence. A relative pathname that does not specify a drive has no prefix.
Instances of this class may or may not denote an actual file-system object such as a file or a directory. If it does denote such an object then that object resides in a partition. A partition is an operating system-specific portion of storage for a file system. A single storage device (e.g. a physical disk-drive, flash memory, CD-ROM) may contain multiple partitions. The object, if any, will reside on the partition named by some ancestor of the absolute form of this pathname.
A file system may implement restrictions to certain operations on the actual file-system object, such as reading, writing, and executing. These restrictions are collectively known as access permissions. The file system may have multiple sets of access permissions on a single object. For example, one set may apply to the object's owner, and another may apply to all other users. The access permissions on an object may cause some methods in this class to fail.
Instances of the File class are immutable; that is, once created, the abstract pathname represented by a File object will never change. @version 1.142, 04/01/09 @author unascribed @since JDK1.0

   * @param absolute the File to convert to relative path
   * @return a File with a path that is relative to the user's directory
   * @exception Exception if the path cannot be constructed
   */
  protected static File createRelativePath(File absolute) throws Exception {
    File userDir = new File(System.getProperty("user.dir"));
    String userPath = userDir.getAbsolutePath() + File.separator;
    String targetPath = (new File(absolute.getParent())).getPath() 
      + File.separator;
    String fileName = absolute.getName();
    StringBuffer relativePath = new StringBuffer();
    //    relativePath.append("."+File.separator);
    //    System.err.println("User dir "+userPath);
    //    System.err.println("Target path "+targetPath);
    
    // file is in user dir (or subdir)
    int subdir = targetPath.indexOf(userPath);
    if (subdir == 0) {
      if (userPath.length() == targetPath.length()) {
  relativePath.append(fileName);
      } else {
  int ll = userPath.length();
  relativePath.append(targetPath.substring(ll));
  relativePath.append(fileName);
      }
    } else {
      int sepCount = 0;
      String temp = new String(userPath);
      while (temp.indexOf(File.separator) != -1) {
  int ind = temp.indexOf(File.separator);
  sepCount++;
  temp = temp.substring(ind+1, temp.length());
      }
      
      String targetTemp = new String(targetPath);
      String userTemp = new String(userPath);
      int tcount = 0;
      while (targetTemp.indexOf(File.separator) != -1) {
  int ind = targetTemp.indexOf(File.separator);
  int ind2 = userTemp.indexOf(File.separator);
  String tpart = targetTemp.substring(0,ind+1);
  String upart = userTemp.substring(0,ind2+1);
  if (tpart.compareTo(upart) != 0) {
    if (tcount == 0) {
      tcount = -1;
    }
    break;
  }
  tcount++;
  targetTemp = targetTemp.substring(ind+1, targetTemp.length());
  userTemp = userTemp.substring(ind2+1, userTemp.length());
      }
      if (tcount == -1) {
  // then target file is probably on another drive (under windows)
  throw new Exception("Can't construct a path to file relative to user "
          +"dir.");
      }
      if (targetTemp.indexOf(File.separator) == -1) {
  targetTemp = "";
      }
      for (int i = 0; i < sepCount - tcount; i++) {
  relativePath.append(".."+File.separator);
      }
      relativePath.append(targetTemp + fileName);
    }
    //    System.err.println("new path : "+relativePath.toString());
    return new File(relativePath.toString());
  }

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   * weka.gui.GUICHooser.HowToFindPackageManager).
   * @return true if the user has opted not to view the named dialog
   * in the future.
   */
  public static boolean getDontShowDialog(String dialogName) {
    File wekaHome = WekaPackageManager.WEKA_HOME;
    
    if (!wekaHome.exists()) {
      return false;
    }
    
    File dialogSubDir = new File(wekaHome.toString() + File.separator + "systemDialogs");
    if (!dialogSubDir.exists()) {
      return false;
    }
    
    File dialogFile = new File(dialogSubDir.toString() + File.separator + dialogName);
    
    return dialogFile.exists();
  }

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   * @throws Exception if the marker file that is used to indicate that
   * a named dialog is not to be shown can't be created. This file lives
   * in $WEKA_HOME/systemDialogs
   */
  public static void setDontShowDialog(String dialogName) throws Exception {
    File wekaHome = WekaPackageManager.WEKA_HOME;
    
    if (!wekaHome.exists()) {
      return;
    }
    
    File dialogSubDir = new File(wekaHome.toString() + File.separator + "systemDialogs");
    if (!dialogSubDir.exists()) {
      if (!dialogSubDir.mkdir()) {
        return;
      }
    }
    
    File dialogFile = new File(dialogSubDir.toString() + File.separator + dialogName);
    dialogFile.createNewFile();
  }

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  public static String getDontShowDialogResponse(String dialogName) throws Exception {
    if (!getDontShowDialog(dialogName)) {
      return null; // This must be the first time - no file recorded yet.
    }
    
    File wekaHome = WekaPackageManager.WEKA_HOME;
    File dialogSubDir = new File(wekaHome.toString() + File.separator 
        + "systemDialogs" + File.separator + dialogName);


    
    BufferedReader br = new BufferedReader(new FileReader(dialogSubDir));
    String response = br.readLine();

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   * @throws Exception if there is a problem saving the information
   */
  public static void setDontShowDialogResponse(String dialogName, String response) 
    throws Exception {
    
    File wekaHome = WekaPackageManager.WEKA_HOME;
    
    if (!wekaHome.exists()) {
      return;
    }
    
    File dialogSubDir = new File(wekaHome.toString() + File.separator + "systemDialogs");
    if (!dialogSubDir.exists()) {
      if (!dialogSubDir.mkdir()) {
        return;
      }
    }
    
    File dialogFile = new File(dialogSubDir.toString() + File.separator + dialogName);
    BufferedWriter br = new BufferedWriter(new FileWriter(dialogFile));
    br.write(response + "\n");
    br.flush();
    br.close();
  }

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      if (m_FileChooser == null) {
  createFileChooser();
      }
      int returnVal = m_FileChooser.showOpenDialog(this);
      if (returnVal == JFileChooser.APPROVE_OPTION) {
  File selected = m_FileChooser.getSelectedFile();
  try {
    ObjectInputStream oi = new ObjectInputStream(new BufferedInputStream(new FileInputStream(selected)));
    Object obj = oi.readObject();
    oi.close();
    if (!m_ClassType.isAssignableFrom(obj.getClass())) {
      throw new Exception("Object not of type: " + m_ClassType.getName());
    }
    return obj;
  } catch (Exception ex) {
    JOptionPane.showMessageDialog(this,
          "Couldn't read object: "
          + selected.getName() 
          + "\n" + ex.getMessage(),
          "Open object file",
          JOptionPane.ERROR_MESSAGE);
  }
      }

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      if (m_FileChooser == null) {
  createFileChooser();
      }
      int returnVal = m_FileChooser.showSaveDialog(this);
      if (returnVal == JFileChooser.APPROVE_OPTION) {
  File sFile = m_FileChooser.getSelectedFile();
  try {
    ObjectOutputStream oo = new ObjectOutputStream(new BufferedOutputStream(new FileOutputStream(sFile)));
    oo.writeObject(object);
    oo.close();
  } catch (Exception ex) {
    JOptionPane.showMessageDialog(this,
          "Couldn't write to file: "
          + sFile.getName() 
          + "\n" + ex.getMessage(),
          "Save object",
          JOptionPane.ERROR_MESSAGE);
  }
      }

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    /**
     * Creates the file chooser the user will use to save/load files with.
     */
    protected void createFileChooser() {
      
      m_FileChooser = new JFileChooser(new File(System.getProperty("user.dir")));
      m_FileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
    }

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    super.setOptions(options);
    
    tmpStr = Utils.getOption("model", options);
    if (tmpStr.length() != 0)
      setModelFile(new File(tmpStr));
    else
      setModelFile(new File(System.getProperty("user.dir")));
  }

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                org.apache.synapse.config.xml.endpoints.TemplateFactory templateFactory =
                        new org.apache.synapse.config.xml.endpoints.TemplateFactory();


                Template tm = templateFactory.createEndpointTemplate(artifactConfig, properties);


                tm.setFileName(new File(fileName).getName());
                if (log.isDebugEnabled()) {
                    log.debug("Endpoint Template named '" + tm.getName()
                            + "' has been built from the file " + fileName);
                }


                getSynapseConfiguration().addEndpointTemplate(tm.getName(), tm);
                if (log.isDebugEnabled()) {
                    log.debug("Template Deployment from file : " + fileName + " : Completed");
                }
                log.info("Endpoint Template named '" + tm.getName()
                        + "' has been deployed from file : " + fileName);


                return tm.getName();
            } else {
                element = artifactConfig.getFirstChildWithName(
                        new QName(SynapseConstants.SYNAPSE_NAMESPACE, "sequence"));
                if (element != null) {
                    Mediator mediator = MediatorFactoryFinder.getInstance().
                            getMediator(artifactConfig, properties);
                    if (mediator instanceof TemplateMediator) {
                        TemplateMediator tm = (TemplateMediator) mediator;


                        tm.setFileName((new File(fileName)).getName());
                        if (log.isDebugEnabled()) {
                            log.debug("Sequence Template named '" + tm.getName()
                                    + "' has been built from the file " + fileName);
                        }

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