Beispiel #1
0
  // TODO: Make ln fit the 30 line
  public void ln(String firstPath, String secondPath) throws Exception {
    // Initialize the variables.
    JShellItem targetItem;
    JShellItem aliasItem;
    String newName;
    Directory destinationDirectory;

    // Find and reference the target item. Throw Exception if the path
    // doesn't exist.
    targetItem = getItemAtPath(firstPath, 0);
    if (targetItem == null) {
      throw new Exception(firstPath + ": doesn't exist.");
    }

    // Find and reference the destination Directory.
    if (secondPath.endsWith("/")) {
      destinationDirectory = (Directory) getItemAtPath(secondPath, 0);
      newName = targetItem.getName();
    } else {
      destinationDirectory = (Directory) getItemAtPath(secondPath, 1);
      newName = secondPath.substring(secondPath.lastIndexOf("/") + 1);
    }

    // If the Directory destination is not found.
    if (destinationDirectory == null) {
      throw new Exception(secondPath + " is an invalid destination path.");
    }

    // Throw Exception when there is a JShellItem that already exist within
    // the destination Directory.
    if (destinationDirectory.contains(newName)) {
      throw new Exception(secondPath + ": already exists.");
    }

    // If the target item is a Directory object.
    if (targetItem instanceof Directory)
      // Create a new Directory object that will references it's contents
      // from the target item.
      aliasItem =
          new DirectoryAlias(
              newName,
              destinationDirectory.getPath() + newName + "/",
              destinationDirectory,
              (Directory) targetItem);

    // If the target item is a File object.
    else
      // Create a new FileAlias object that will reference it's contents
      // from the target item.
      aliasItem =
          new FileAlias(
              newName,
              destinationDirectory.getPath() + newName,
              destinationDirectory,
              (File) targetItem);

    // Add the alias object to the destination Directory.
    destinationDirectory.addItem(aliasItem);
  }
Beispiel #2
0
  /**
   * Copy file or directory oldFile to newFile;
   *
   * @param oldFile a full path to a JShellItem or the name of a JShellItem in the current directory
   *     which needs to be copied.
   * @param newFile a full path to a directory or the name of a directory in the current directory
   *     to which oldFile needs to be copied.
   */
  public void cp(String oldPath, String newPath) throws Exception {
    Directory destinationParent;
    String newName;
    if (oldPath.equals(newPath)) {
      return;
    }
    JShellItem oldItem = getItemAtPath(oldPath, 0);
    if (oldItem == null) {
      throw new Exception(oldItem + " does not exist.");
    }
    if (newPath.endsWith("/")) {
      destinationParent = (Directory) getItemAtPath(newPath, 0);
      newName = oldItem.getName();
    } else {
      destinationParent = (Directory) getItemAtPath(newPath, 1);
      newName = newPath.substring(newPath.lastIndexOf("/") + 1);
    }

    if (destinationParent == null) {
      throw new Exception(newPath + " is an invalid destination path.");
    }
    if (destinationParent.contains(newName)) {
      throw new Exception(destinationParent.getPath() + newName + " already exists.");
    }
    if (oldItem instanceof File) {
      File newItem =
          new File(
              newName,
              destinationParent.getPath() + "/" + newName,
              destinationParent,
              ((File) oldItem).getContent());
      destinationParent.addItem(newItem);
    } else {
      if (destinationParent.isChildOf((Directory) oldItem)) {
        throw new Exception(
            String.format("cp: cannot copy '%s' into itself, '%s'", oldPath, newPath));
      }
      Directory newItem =
          new Directory(newName, destinationParent.getPath() + newName + "/", destinationParent);
      destinationParent.addItem(newItem);
      for (JShellItem item : ((Directory) oldItem).getContents().values()) {
        cp(item.getPath(), newItem.getPath());
      }
    }
  }
Beispiel #3
0
  /**
   * Move file or directory oldFile to newFile;
   *
   * @param oldFile a full path to a JShellItem or the name of a JShellItem in the current directory
   *     which needs to be moved.
   * @param newFile a full path to a directory or the name of a directory in the current directory
   *     to which oldFile needs to be moved.
   */
  public void mv(String oldFile, String newFile) throws Exception {
    JShellItem source = getItemAtPath(oldFile, 0);
    if (source == null) {
      throw new Exception(oldFile + ": doesn't exist.");
    }
    Directory sourceParent = source.getParentDirectory();
    Directory destinationParent;
    String newName;

    if (newFile.endsWith("/")) {
      destinationParent = (Directory) getItemAtPath(newFile, 0);
      newName = source.getName();

    } else {
      destinationParent = (Directory) getItemAtPath(newFile, 1);
      newName = newFile.substring(newFile.lastIndexOf("/") + 1);
    }

    if (destinationParent == null) {
      throw new Exception(newFile + ": invalid destination path.");
    }
    if (destinationParent.contains(newName)) {
      throw new Exception(newFile + ": already exists.");
    }
    sourceParent.removeItem(source);
    source.setName(newName);
    if (source instanceof Directory) {
      if (destinationParent.isChildOf((Directory) source)) {
        throw new Exception(
            String.format(
                "mv: cannot move '%s' to a subdirectory of itself, '%s'", oldFile, newFile));
      }
      newName.concat("/");
    }
    source.setPath(destinationParent.getPath() + newName);
    source.setParentDirectory(destinationParent);
    destinationParent.addItem(source);
  }