private DataRow[] GetLinearFilteredRows(Range range)
{
DataRow[] resultRows;
if (this.linearExpression == null)
{
int count = range.Count;
resultRows = table.NewRowArray(count);
for (int i = 0; i < count; i++)
{
resultRows[i] = index.GetRow(i + range.Min);
}
return(resultRows);
}
ArrayList matchingRows = new ArrayList();
for (int i = range.Min; i <= range.Max; i++)
{
int record = index.GetRecord(i);
if (AcceptRecord(record))
{
matchingRows.Add(index.GetRow(i));
}
}
resultRows = table.NewRowArray(matchingRows.Count);
matchingRows.CopyTo((Array)resultRows);
return(resultRows);
}
internal void CascadeCommit(DataRow row)
{
if (row.RowState == DataRowState.Detached)
{
return;
}
if (acceptRejectRule == AcceptRejectRule.Cascade)
{
Index childIndex = childKey.GetSortIndex(row.RowState == DataRowState.Deleted ? DataViewRowState.Deleted : DataViewRowState.CurrentRows);
object[] key = row.GetKeyValues(parentKey, row.RowState == DataRowState.Deleted ? DataRowVersion.Original : DataRowVersion.Default);
if (IsKeyNull(key))
{
return;
}
Range range = childIndex.FindRecords(key);
if (!range.IsNull)
{
for (int j = range.Min; j <= range.Max; j++)
{
DataRow childRow = childIndex.GetRow(j);
if (childRow.inCascade)
{
continue;
}
childRow.AcceptChanges();
}
}
}
}
internal void CascadeRollback(DataRow row)
{
Debug.Assert(row.Table.DataSet != null);
Index childIndex = _childKey.GetSortIndex(row.RowState == DataRowState.Deleted ? DataViewRowState.OriginalRows : DataViewRowState.CurrentRows);
object[] key = row.GetKeyValues(_parentKey, row.RowState == DataRowState.Modified ? DataRowVersion.Current : DataRowVersion.Default);
if (IsKeyNull(key))
{
return;
}
Range range = childIndex.FindRecords(key);
if (_acceptRejectRule == AcceptRejectRule.Cascade)
{
if (!range.IsNull)
{
DataRow[] rows = childIndex.GetRows(range);
for (int j = 0; j < rows.Length; j++)
{
if (rows[j]._inCascade)
{
continue;
}
rows[j].RejectChanges();
}
}
}
else
{
// AcceptRejectRule.None
if (row.RowState != DataRowState.Deleted && row.Table.DataSet.EnforceConstraints)
{
if (!range.IsNull)
{
if (range.Count == 1 && childIndex.GetRow(range.Min) == row)
{
return;
}
if (row.HasKeyChanged(_parentKey))
{// if key is not changed, this will not cause child to be stranded
throw ExceptionBuilder.FailedCascadeUpdate(ConstraintName);
}
}
}
}
}
internal void CascadeRollback(DataRow row)
{
Index childIndex = childKey.GetSortIndex(row.RowState == DataRowState.Deleted ? DataViewRowState.OriginalRows : DataViewRowState.CurrentRows);
object[] key = row.GetKeyValues(parentKey, row.RowState == DataRowState.Modified ? DataRowVersion.Current : DataRowVersion.Default);
// Bug : This is definitely not a proper fix. (Ref. MDAC Bug 73592)
if (IsKeyNull(key))
{
return;
}
Range range = childIndex.FindRecords(key);
if (acceptRejectRule == AcceptRejectRule.Cascade)
{
if (!range.IsNull)
{
DataRow[] rows = childIndex.GetRows(range);
for (int j = 0; j < rows.Length; j++)
{
if (rows[j].inCascade)
{
continue;
}
rows[j].RejectChanges();
}
}
}
else
{
// AcceptRejectRule.None
if (row.RowState != DataRowState.Deleted && row.Table.DataSet.EnforceConstraints)
{
if (!range.IsNull)
{
if (range.Count == 1 && childIndex.GetRow(range.Min) == row)
{
return;
}
throw ExceptionBuilder.FailedCascadeUpdate(ConstraintName);
}
}
}
}
internal void CascadeDelete(DataRow row)
{
if (-1 == row.newRecord)
{
return;
}
object[] currentKey = row.GetKeyValues(parentKey, DataRowVersion.Current);
if (IsKeyNull(currentKey))
{
return;
}
Index childIndex = childKey.GetSortIndex();
switch (DeleteRule)
{
case Rule.None: {
if (row.Table.DataSet.EnforceConstraints)
{
// if we're not cascading deletes, we should throw if we're going to strand a child row under enforceConstraints.
Range range = childIndex.FindRecords(currentKey);
if (!range.IsNull)
{
if (range.Count == 1 && childIndex.GetRow(range.Min) == row)
{
return;
}
throw ExceptionBuilder.FailedCascadeDelete(ConstraintName);
}
}
break;
}
case Rule.Cascade: {
object[] key = row.GetKeyValues(parentKey, DataRowVersion.Default);
Range range = childIndex.FindRecords(key);
if (!range.IsNull)
{
DataRow[] rows = childIndex.GetRows(range);
for (int j = 0; j < rows.Length; j++)
{
DataRow r = rows[j];
if (r.inCascade)
{
continue;
}
r.Table.DeleteRow(r);
}
}
break;
}
case Rule.SetNull: {
object[] proposedKey = new object[childKey.Columns.Length];
for (int i = 0; i < childKey.Columns.Length; i++)
{
proposedKey[i] = DBNull.Value;
}
Range range = childIndex.FindRecords(currentKey);
if (!range.IsNull)
{
DataRow[] rows = childIndex.GetRows(range);
for (int j = 0; j < rows.Length; j++)
{
// if (rows[j].inCascade)
// continue;
if (row != rows[j])
{
rows[j].SetKeyValues(childKey, proposedKey);
}
}
}
break;
}
case Rule.SetDefault: {
object[] proposedKey = new object[childKey.Columns.Length];
for (int i = 0; i < childKey.Columns.Length; i++)
{
proposedKey[i] = childKey.Columns[i].DefaultValue;
}
Range range = childIndex.FindRecords(currentKey);
if (!range.IsNull)
{
DataRow[] rows = childIndex.GetRows(range);
for (int j = 0; j < rows.Length; j++)
{
// if (rows[j].inCascade)
// continue;
if (row != rows[j])
{
rows[j].SetKeyValues(childKey, proposedKey);
}
}
}
break;
}
default: {
Debug.Assert(false, "Unknown Rule value");
break;
}
}
}
internal void CascadeRollback(DataRow row)
{
Index sortIndex = this.childKey.GetSortIndex((row.RowState == DataRowState.Deleted) ? DataViewRowState.OriginalRows : DataViewRowState.CurrentRows);
object[] keyValues = row.GetKeyValues(this.parentKey, (row.RowState == DataRowState.Modified) ? DataRowVersion.Current : DataRowVersion.Default);
if (!this.IsKeyNull(keyValues))
{
Range range = sortIndex.FindRecords(keyValues);
if (this.acceptRejectRule == System.Data.AcceptRejectRule.Cascade)
{
if (!range.IsNull)
{
DataRow[] rows = sortIndex.GetRows(range);
for (int i = 0; i < rows.Length; i++)
{
if (!rows[i].inCascade)
{
rows[i].RejectChanges();
}
}
}
}
else if (((((row.RowState != DataRowState.Deleted) && row.Table.DataSet.EnforceConstraints) && !range.IsNull) && ((range.Count != 1) || (sortIndex.GetRow(range.Min) != row))) && row.HasKeyChanged(this.parentKey))
{
throw ExceptionBuilder.FailedCascadeUpdate(this.ConstraintName);
}
}
}
internal void CascadeDelete(DataRow row)
{
if (-1 != row.newRecord)
{
object[] keyValues = row.GetKeyValues(this.parentKey, DataRowVersion.Current);
if (!this.IsKeyNull(keyValues))
{
Index sortIndex = this.childKey.GetSortIndex();
switch (this.DeleteRule)
{
case Rule.None:
if (row.Table.DataSet.EnforceConstraints)
{
Range range4 = sortIndex.FindRecords(keyValues);
if (range4.IsNull)
{
return;
}
if ((range4.Count != 1) || (sortIndex.GetRow(range4.Min) != row))
{
throw ExceptionBuilder.FailedCascadeDelete(this.ConstraintName);
}
}
return;
case Rule.Cascade:
{
object[] key = row.GetKeyValues(this.parentKey, DataRowVersion.Default);
Range range3 = sortIndex.FindRecords(key);
if (!range3.IsNull)
{
foreach (DataRow row2 in sortIndex.GetRows(range3))
{
if (!row2.inCascade)
{
row2.Table.DeleteRow(row2);
}
}
}
return;
}
case Rule.SetNull:
{
object[] objArray3 = new object[this.childKey.ColumnsReference.Length];
for (int i = 0; i < this.childKey.ColumnsReference.Length; i++)
{
objArray3[i] = DBNull.Value;
}
Range range2 = sortIndex.FindRecords(keyValues);
if (!range2.IsNull)
{
DataRow[] rows = sortIndex.GetRows(range2);
for (int j = 0; j < rows.Length; j++)
{
if (row != rows[j])
{
rows[j].SetKeyValues(this.childKey, objArray3);
}
}
}
return;
}
case Rule.SetDefault:
{
object[] objArray2 = new object[this.childKey.ColumnsReference.Length];
for (int k = 0; k < this.childKey.ColumnsReference.Length; k++)
{
objArray2[k] = this.childKey.ColumnsReference[k].DefaultValue;
}
Range range = sortIndex.FindRecords(keyValues);
if (!range.IsNull)
{
DataRow[] rowArray = sortIndex.GetRows(range);
for (int m = 0; m < rowArray.Length; m++)
{
if (row != rowArray[m])
{
rowArray[m].SetKeyValues(this.childKey, objArray2);
}
}
}
return;
}
}
}
}
}
