Keeping the new line as current after executeQuery.
Hello
JDev 11.1.2.4.0
'Because of spam, this content is blocked "= > http://pastebin.com/jtwWWseQ ".
Kind regards
Pamela
It is a scenario common, yet very tricky to implement in a way that doesn't create performance issues.
Option 1: run the query and reset the current row thereafter:
Public Sub executeAndPreserveRow()
{
Line currentRow = getCurrentRow();
If (currentRow is nothing)
{
executeQuery();
}
on the other
{
Key currentRowKey = currentRow.getKey ();
int rangePosOfCurrentRow = getRangeIndexOf (currentRow);
int rangeStartBeforeQuery = getRangeStart();
executeQuery();
If (rangeStartBeforeQuery <> this.getEstimatedRowCount (())
{
setRangeStart (rangeStartBeforeQuery);
}
Line lines [] = findByKey (currentRowKey, 1);
If (rows! = null & rows.length == 1 & rangePosOfCurrentRow > = 0)
{
scrollRangeTo (lines [0], rangePosOfCurrentRow);
setCurrentRowAtRangeIndex (getRangeIndexOf(rows[0]));
}
}
}
Now, if your view object is mapped to a potentially important game data or not,
You can use either this.getEstimatedRowCount () or this.getRowCount ().
The first fact the count at the database level by pulling a SELECT COUNT, while the letter No County in the server's memory,
That's why he must extract all records in memory first, which is very costly in terms of scalability.
Bottom line: you can use getRowCount() then the original version contains a small no records (1-50) and getEstimatedRowCount() when
the dataset is larger.
Option 2: make insert, make commit, Rollback
You can follow this blog:
Andrejus Baranovskis Blog: ADF Restore Operation and stay on Current Row
On top of the blog instructions, depending on the version of the ADF, you may need to add the attribute ClearCacheOnRollback on your Application Module:
<>
Name = "AppModule.
.........
ClearCacheOnRollback = "false" >
Tags: Java
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JDEV 11G PS 3/** * Insert new Rows at the end of RowSet. * @param row */ @Override public void insertRow(Row row) { //go to the end of Rowset if it has rows Row lastRow = this.last(); if (lastRow != null) { //insert new row at the end and make it current int indx = this.getRangeIndexOf(lastRow) + 1; this.insertRowAtRangeIndex(indx, row); this.setCurrentRow(row); } else { // empty Rowset super.insertRow(row); } }
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Salim cordially.
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