| private ConvertValue ( object value ) : object | ||
| value | object | |
| return | object | |
internal override void CheckConstraint(DataRow childRow, DataRowAction action)
{
if ((action == DataRowAction.Change ||
action == DataRowAction.Add ||
action == DataRowAction.Rollback) &&
Table.DataSet != null && Table.DataSet.EnforceConstraints &&
childRow.HasKeyChanged(_childKey))
{
// This branch is for cascading case verification.
DataRowVersion version = (action == DataRowAction.Rollback) ? DataRowVersion.Original : DataRowVersion.Current;
object[] childKeyValues = childRow.GetKeyValues(_childKey);
// check to see if this is just a change to my parent's proposed value.
if (childRow.HasVersion(version))
{
// this is the new proposed value for the parent.
DataRow parentRow = DataRelation.GetParentRow(ParentKey, ChildKey, childRow, version);
if (parentRow != null && parentRow._inCascade)
{
object[] parentKeyValues = parentRow.GetKeyValues(_parentKey, action == DataRowAction.Rollback ? version : DataRowVersion.Default);
int parentKeyValuesRecord = childRow.Table.NewRecord();
childRow.Table.SetKeyValues(_childKey, parentKeyValues, parentKeyValuesRecord);
if (_childKey.RecordsEqual(childRow._tempRecord, parentKeyValuesRecord))
{
return;
}
}
}
// now check to see if someone exists... it will have to be in a parent row's current, not a proposed.
object[] childValues = childRow.GetKeyValues(_childKey);
if (!IsKeyNull(childValues))
{
Index parentIndex = _parentKey.GetSortIndex();
if (!parentIndex.IsKeyInIndex(childValues))
{
// could be self-join constraint
if (_childKey.Table == _parentKey.Table && childRow._tempRecord != -1)
{
int lo = 0;
for (lo = 0; lo < childValues.Length; lo++)
{
DataColumn column = _parentKey.ColumnsReference[lo];
object value = column.ConvertValue(childValues[lo]);
if (0 != column.CompareValueTo(childRow._tempRecord, value))
{
break;
}
}
if (lo == childValues.Length)
{
return;
}
}
throw ExceptionBuilder.ForeignKeyViolation(ConstraintName, childKeyValues);
}
}
}
}
private int FindNodeByKey(object?originalKey)
{
int x, c;
if (_indexFields.Length != 1)
{
throw ExceptionBuilder.IndexKeyLength(_indexFields.Length, 1);
}
x = _records.root;
if (IndexTree.NIL != x)
{
// otherwise storage may not exist
DataColumn column = _indexFields[0].Column;
object? key = column.ConvertValue(originalKey);
x = _records.root;
if (_indexFields[0].IsDescending)
{
while (IndexTree.NIL != x)
{
c = column.CompareValueTo(_records.Key(x), key);
if (c == 0)
{
break;
}
if (c < 0)
{
x = _records.Left(x);
} // < for decsending
else
{
x = _records.Right(x);
}
}
}
else
{
while (IndexTree.NIL != x)
{
c = column.CompareValueTo(_records.Key(x), key);
if (c == 0)
{
break;
}
if (c > 0)
{
x = _records.Left(x);
} // > for ascending
else
{
x = _records.Right(x);
}
}
}
}
return(x);
}
private int FindNodeByKey(object originalKey)
{
if (this.IndexFields.Length != 1)
{
throw ExceptionBuilder.IndexKeyLength(this.IndexFields.Length, 1);
}
int root = this.records.root;
if (root != 0)
{
int num2;
DataColumn column = this.IndexFields[0].Column;
object obj2 = column.ConvertValue(originalKey);
root = this.records.root;
if (!this.IndexFields[0].IsDescending)
{
while (root != 0)
{
num2 = column.CompareValueTo(this.records.Key(root), obj2);
if (num2 == 0)
{
return root;
}
if (num2 > 0)
{
root = this.records.Left(root);
}
else
{
root = this.records.Right(root);
}
}
return root;
}
while (root != 0)
{
num2 = column.CompareValueTo(this.records.Key(root), obj2);
if (num2 == 0)
{
return root;
}
if (num2 < 0)
{
root = this.records.Left(root);
}
else
{
root = this.records.Right(root);
}
}
}
return root;
}
internal override void CheckConstraint(DataRow childRow, DataRowAction action)
{
if (((((action == DataRowAction.Change) || (action == DataRowAction.Add)) || (action == DataRowAction.Rollback)) && ((this.Table.DataSet != null) && this.Table.DataSet.EnforceConstraints)) && childRow.HasKeyChanged(this.childKey))
{
DataRowVersion version = (action == DataRowAction.Rollback) ? DataRowVersion.Original : DataRowVersion.Current;
object[] keyValues = childRow.GetKeyValues(this.childKey);
if (childRow.HasVersion(version))
{
DataRow row = DataRelation.GetParentRow(this.ParentKey, this.ChildKey, childRow, version);
if ((row != null) && row.inCascade)
{
object[] objArray2 = row.GetKeyValues(this.parentKey, (action == DataRowAction.Rollback) ? version : DataRowVersion.Default);
int record = childRow.Table.NewRecord();
childRow.Table.SetKeyValues(this.childKey, objArray2, record);
if (this.childKey.RecordsEqual(childRow.tempRecord, record))
{
return;
}
}
}
object[] values = childRow.GetKeyValues(this.childKey);
if (!this.IsKeyNull(values) && !this.parentKey.GetSortIndex().IsKeyInIndex(values))
{
if ((this.childKey.Table == this.parentKey.Table) && (childRow.tempRecord != -1))
{
int index = 0;
index = 0;
while (index < values.Length)
{
DataColumn column = this.parentKey.ColumnsReference[index];
object obj2 = column.ConvertValue(values[index]);
if (column.CompareValueTo(childRow.tempRecord, obj2) != 0)
{
break;
}
index++;
}
if (index == values.Length)
{
return;
}
}
throw ExceptionBuilder.ForeignKeyViolation(this.ConstraintName, keyValues);
}
}
}