CustomUploadField.php

<?php
class CustomUploadField extends UploadField {
  /**
	 * FieldList $fields or string $name (of a method on File to provide a fields) for the EditForm
	 * @example 'getCMSFields'
	 *
	 * @var FieldList|string
	 */
	private static $fileOwnerId =0;
  /**
	 * FieldList $fields or string $name (of a method on File to provide a fields) for the EditForm
	 * @example 'getCMSFields'
	 *
	 * @var FieldList|string
	 */
	private static $itemTitle = 'Defualt';
  /**
	 * FieldList $fields or string $name (of a method on File to provide a fields) for the EditForm
	 * @example 'getCMSFields'
	 *
	 * @var FieldList|string
	 */
	private static $itemVersion = '0.0.1';
  // public function setFileOwnerId($fileOwnerId){
  //   $this->$fileOwnerId = $fileOwnerId;
  //   Debug::show($this->$fileOwnerId);
  //   Debug::show($fileOwnerId);
  // }
  // public function setItemTitle($itemTitle){
  //   $this->$itemTitle = $itemTitle;
  // }
  // public function setItemVersion($itemVersion){
  //   $this->$itemVersion = $itemVersion;
  // }
  // public function setNameGeneratorInfo($fileOwnerId,$itemTitle,$itemVersion){
  //   $this->$fileOwnerId = $fileOwnerId;
  //   $this->$itemTitle = $itemTitle;
  //   $this->$itemVersion = $itemVersion;
	// 	return $this;
  // }
  public function getGeneratedFileName(){
    $userId = $this->$fileOwnerId;
    $itemTitle = $this->$itemTitle;
    $itemVersion = $this->$itemVersion;
    return hash("md5", $userId.$itemTitle.$itemVersion);
  }