/// <summary>
/// Submit the specified row collection with 'Update' statements.
/// </summary>
public void Update(RowCollection collection, bool onlyUpdated = false)
{
// ensure the Table is initialized
if (_initialize)
{
Initialize();
}
object[] values = new object[collection.Columns.Count];
// only update rows that have changed?
if (onlyUpdated)
{
bool[] updated = new bool[collection.Columns.Count];
// iterate the updated rows collection
foreach (IRow row in collection.Rows)
{
if (row.Updated)
{
// build an update query for the each row
Query builder = new Query(this);
builder.Add(Cql.Update);
// get the current values and updated flags for the cells
row.GetValues(values);
row.GetUpdated(updated);
// add the updated columns and values to the builder
for (int i = values.Length - 1; i >= 0; --i)
{
if (updated[i])
{
builder.Add(collection.Columns[i]);
builder.Add(values[i]);
}
}
// add the identifier columns
for (int i = values.Length - 1; i >= 0; --i)
{
if (collection.Columns[i].IsIdentifier)
{
// add the 'WHERE' command for the identifier
builder.Add(Cql.Where);
builder.Add(collection.Columns[i]);
builder.Add(Cql.Equal);
builder.Add(values[i]);
}
}
row.Updated = false;
// execute the query
builder.ExecuteAsync();
}
}
}
else
{
// iterate the rows collection
foreach (IRow row in collection.Rows)
{
// build an update query for the each row
Query builder = new Query(this);
builder.Add(Cql.Update);
// get the current values and updated flags for the cells
row.GetValues(values);
// add the updated columns and values to the builder
for (int i = values.Length - 1; i >= 0; --i)
{
builder.Add(collection.Columns[i]);
builder.Add(values[i]);
}
// add the 'WHERE' portion of the statement
builder.Add(Cql.Where);
// add the identifying columns
for (int i = values.Length - 1; i >= 0; --i)
{
if (collection.Columns[i].IsIdentifier)
{
builder.Add(collection.Columns[i]);
builder.Add(values[i]);
}
}
row.Updated = false;
// execute the query
builder.ExecuteAsync();
}
}
}
/// <summary>
/// Add a row collection that could potentially be updated.
/// </summary>
internal void AddCollection(RowCollection collection)
{
_lock.Take();
_currentCollections.Add(collection);
_lock.Release();
}