//Rolls back index to a chosen ID
private void RollBackLast(int id)
{
// System.out.println("Attempting to rollback to "+id);
System.String ids = "-" + id;
IndexCommit last = null;
System.Collections.ICollection commits = IndexReader.ListCommits(dir);
for (System.Collections.IEnumerator iterator = commits.GetEnumerator(); iterator.MoveNext();)
{
IndexCommit commit = (IndexCommit)iterator.Current;
System.Collections.Generic.IDictionary <string, string> ud = commit.GetUserData();
if (ud.Count > 0)
{
if (((System.String)ud["index"]).EndsWith(ids))
{
last = commit;
}
}
}
if (last == null)
{
throw new System.SystemException("Couldn't find commit point " + id);
}
IndexWriter w = new IndexWriter(dir, new WhitespaceAnalyzer(), new RollbackDeletionPolicy(this, id), MaxFieldLength.UNLIMITED, last);
System.Collections.Generic.IDictionary <string, string> data = new System.Collections.Generic.Dictionary <string, string>();
data["index"] = "Rolled back to 1-" + id;
w.Commit(data);
w.Close();
}
public override IDictionary <string, string> GetUserData()
{
return(cp.GetUserData());
}
public virtual void OnInit(System.Collections.IList commits)
{
for (System.Collections.IEnumerator iterator = commits.GetEnumerator(); iterator.MoveNext();)
{
IndexCommit commit = (IndexCommit)iterator.Current;
System.Collections.Generic.IDictionary <string, string> userData = commit.GetUserData();
if (userData.Count > 0)
{
// Label for a commit point is "Records 1-30"
// This code reads the last id ("30" in this example) and deletes it
// if it is after the desired rollback point
System.String x = (System.String)userData["index"];
System.String lastVal = x.Substring(x.LastIndexOf("-") + 1);
int last = System.Int32.Parse(lastVal);
if (last > rollbackPoint)
{
/*
* System.out.print("\tRolling back commit point:" +
* " UserData="+commit.getUserData() +") ("+(commits.size()-1)+" commit points left) files=");
* Collection files = commit.getFileNames();
* for (Iterator iterator2 = files.iterator(); iterator2.hasNext();) {
* System.out.print(" "+iterator2.next());
* }
* System.out.println();
*/
commit.Delete();
}
}
}
}
public override System.Collections.Generic.IDictionary <string, string> GetUserData()
{
return(cp.GetUserData());
}