吉拉：如何获取自定义IssueEventListener中的自定义字段的先前值

问题描述

那么，如何获得 自定义 字段的 上一个 值 在Jira IssueEventListener中？我正在为issueUpdated（IssueEvent）事件编写自定义处理程序，如果某个自定义字段已更改，我想更改处理程序的行为。为了检测更改的类型，我想比较以前的值和当前的值。

So how does one obtain the previous value of a custom field in a Jira IssueEventListener? I am writing a custom handler for the issueUpdated(IssueEvent) event and I would like to alter the handler's behavior if a certain custom field has changed. To detect the type of change I would like to compare the previous and current values.

（我不是在问如何获取其当前值。 em>值-我知道如何从相关问题中获得收益）

(I'm am not asking about how to obtain its current value - I know how to get that from the related Issue)

我正在针对Windows上的Jira 4.0.2进行开发。

I am developing against Jira 4.0.2 on Windows.

是否是扫描更改历史记录中最后一个已知值的最佳方法？

Is the best way to scan the change history for the last known value?

List changes = changeHistoryManager.getChangeHistoriesForUser(issue, user);

推荐答案

我假设原始海报正在编写JIRA Java插件。我不能确定如何在JIRA v4.0.2中完成此任务，但是这是我如何通过JIRA v5.0.2来做到这一点（解决方案可能完全相同）：

I'm assuming the original poster is writing a JIRA plugin with Java. I cannot be certain of how to accomplish this task in JIRA v4.0.2, but here is how I managed to do so with JIRA v5.0.2 (the solutions may very well be the same):

public void workflowEvent( IssueEvent event )
{
  Long eventTypeId = event.getEventTypeId();
  if( eventTypeId.equals( EventType.ISSUE_UPDATED_ID ) )
  {
    List<GenericValue> changeItemList = null;
    try
    {
      changeItemList = event.getChangeLog().getRelated( "ChildChangeItem" );
    }
    catch( GenericEntityException e )
    {
      // Error or do what you need to do here.
      e.printStackTrace();
    }

    if( changeItemList == null )
    {
      // Same deal here.
      return;
    }

    Iterator<GenericValue> changeItemListIterator = changeItemList.iterator();
    while( changeItemListIterator.hasNext() )
    {
      GenericValue changeItem = ( GenericValue )changeItemListIterator.next();
      String fieldName = changeItem.get( "field" ).toString();
      if( fieldName.equals( customFieldName ) ) // Name of custom field.
      {
        Object oldValue = changeItem.get( "oldvalue" );
        Object newValue = changeItem.get( "newvalue" );
      }
    }
  }
}

有些changeItem的可能键值为：

Some possible key values for changeItem are:

• newvalue


• oldstring


• field


• id


• fieldtype


• newstring


• oldvalue


• group

• newvalue
• oldstring
• field
• id
• fieldtype
• newstring
• oldvalue
• group

对于许多自定义字段类型，对象oldValue可能只是一个串。但我认为并非每种情况都如此。

For many of the custom field types Object oldValue is probably just a String. But I don't think that's true for every case.

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