public interface FieldRenderer {
  String renderCustomField(Issue issue, String fieldKey);//
  String renderVersions(Collection<Version> versions);//
  String renderComponents(Collection<ProjectComponent> components);//
  String renderLabels(Collection<Label> labels);//
  String renderSecurityLevel(GenericValue securityLevel);//
  String renderIssueConstant(IssueConstant issueConstant);//
  String renderUser(User user);//
  String renderDateTime(Timestamp ts);//
  String renderEstimate(TemplateIssue ti, I18nHelper i18n);
  String renderRemainingEstimate(TemplateIssue ti, I18nHelper i18n);
  String renderWorklog(TemplateIssue ti, I18nHelper i18n);
  Object renderCustomFieldAsObject(Issue issue, String fieldKey);
  I18nHelper getI18nBean(String locale); //Returns a I18nBean for the given locale, locale string follows java syntax
}

public interface FieldFormatters {
 
//JIRA Date Formatting Options
  /**
  * @returns An object of https://docs.atlassian.com/software/jira/docs/api/latest/com/atlassian/jira/datetime/DateTimeFormatter.html
  */
  DateTimeFormatter getJiraDateTimeFormatter();
 
  /**
  * @returns An object of https://docs.atlassian.com/software/jira/docs/api/latest/com/atlassian/jira/datetime/DateTimeFormatter.html
  */
  DateTimeFormatter getJiraDateTimeFormatter(String styleName);
 
  /**
	Formats a Date object using the given formatter.
    @returns formatted date string or empty string if format is not valid, never returns null
  */
  String formatSafely(DateTimeFormatter dateFormat, Date value);
 
  /**
	Formats a object using the given formatter. If the value object is not a Date, it returns empty string.

    @returns formatted date string or empty string if format is not valid, never returns null
  */
  String formatSafely(DateTimeFormatter dateFormat, Object value);
 
//Java Date Formatting Options
  DateFormat getJavaDateFormat();
  DateFormat getJavaDateFormat(int style);
  DateFormat getJavaDateFormat(int style, String locale);
  DateFormat getJavaDateTimeFormat();
  DateFormat getJavaDateTimeFormat(int dateStyle, int timeStyle);
  DateFormat getJavaDateTimeFormat(int dateStyle, int timeStyle, String locale);  
  DateFormat getJavaDateTimeFormat(String pattern);
 
  /**
	Formats a object using the given DateFormat. If the value object is not a Date, it returns empty string.

    @returns formatted date string or empty string if format is not valid, never returns null
  */
  String formatSafely(DateFormat dateFormat, Object value);
 
 /**
	Formats a object using the given DateFormat. If the value object is not a Date, it returns empty string.

    @returns formatted date string or empty string if format is not valid, never returns null
  */
  String formatSafely(DateFormat dateFormat, Date value);

}