/// <summary>
/// Enumerate the diff items found based on the query passed in as well as the filterString and version passed
/// to InitializeForDiff. The return type is IEnumerable<> so that adapter implementations do not need download and keep
/// all of the IWITDiffItems in memory at once.
/// </summary>
/// <param name="queryCondition">A string that specifies a query used to select a subset of the work items defined by
/// the set that the filter string identified.</param>
/// <returns>An enumeration of IWITDiffItems each representing a work item to be compared by the WIT Diff operation</returns>
public IEnumerable <IWITDiffItem> GetWITDiffItems(string queryCondition)
{
if (null == m_workItemPager)
{
StringBuilder conditionBuilder = new StringBuilder(m_filterString);
if (!string.IsNullOrEmpty(queryCondition))
{
if (conditionBuilder.Length > 0)
{
conditionBuilder.Append(" AND ");
}
conditionBuilder.Append(queryCondition);
}
m_workItemPager = new TfsWorkItemPager(m_projectName, m_workItemStore, conditionBuilder.ToString());
}
WorkItemCollection workItems;
bool workItemFromProjectFound = false;
do
{
workItems = m_workItemPager.GetNextPage();
if (null == workItems)
{
yield break;
}
else
{
foreach (WorkItem workItem in workItems)
{
IWITDiffItem witDiffItem = null;
try
{
if (string.Equals(workItem.Project.Name, m_projectName, StringComparison.OrdinalIgnoreCase))
{
workItemFromProjectFound = true;
witDiffItem = (IWITDiffItem) new TfsWITDiffItem(this, workItem);
}
}
catch (DeniedOrNotExistException)
{
// Ignore this work item and continue
}
if (witDiffItem != null)
{
yield return(witDiffItem);
}
}
}
}
// Continue with the next page if none of the work item in the current page are in the configured project
while (workItems != null && !workItemFromProjectFound);
}
/// <summary>
/// Give the IWITDiffProvider a chance to cleanup any reources allocated during InitializeForDiff()
/// </summary>
public void Cleanup()
{
m_filterString = null;
m_mappedWorkItemTypes = null;
m_workItemPager = null;
}