public static org.sakaiproject.content.api.ContentResourceEdit editResource(
      java.lang.String param0)
      throws org.sakaiproject.exception.PermissionException,
          org.sakaiproject.exception.IdUnusedException, org.sakaiproject.exception.TypeException,
          org.sakaiproject.exception.InUseException {
    org.sakaiproject.content.api.ContentHostingService service = getInstance();
    if (service == null) return null;

    return service.editResource(param0);
  }
  /* (non-Javadoc)
   * @see uk.ac.ox.oucs.oxam.logic.PaperFileService#deposit(uk.ac.ox.oucs.oxam.logic.PaperFile, uk.ac.ox.oucs.oxam.logic.Callback)
   */
  public void deposit(PaperFile paperFile, InputStream in) {
    PaperFileImpl impl = castToImpl(paperFile);
    String path = impl.getPath();
    ContentResourceEdit resource = null;
    try {

      try {
        contentHostingService.checkResource(path);
        resource = contentHostingService.editResource(path);
        // Ignore PermissionException, IdUnusedException, TypeException
        // As they are too serious to continue.
      } catch (IdUnusedException iue) {
        // Will attempt to create containing folders.

        resource = contentHostingService.addResource(path);
        // Like the basename function.
        String filename = StringUtils.substringAfterLast(path, "/");
        ResourceProperties props = resource.getPropertiesEdit();
        props.addProperty(ResourceProperties.PROP_DISPLAY_NAME, filename);
        resource.setContentType(mimeTypes.getContentType(filename));
      }
      resource.setContent(in);
      contentHostingService.commitResource(resource, NotificationService.NOTI_NONE);
      LOG.debug("Sucessfully copied file to: " + path);
    } catch (OverQuotaException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } catch (ServerOverloadException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } catch (PermissionException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } catch (InUseException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } catch (TypeException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } catch (IdUsedException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } catch (IdInvalidException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } catch (InconsistentException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } finally {
      // Close the stream here as this is where it's created.
      if (resource.isActiveEdit()) {
        contentHostingService.cancelResource(resource);
      }
    }
  }