Пример #1
0
        /// <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();
                }
            }
        }
Пример #2
0
 /// <summary>
 /// Add a row collection that could potentially be updated.
 /// </summary>
 internal void AddCollection(RowCollection collection)
 {
     _lock.Take();
     _currentCollections.Add(collection);
     _lock.Release();
 }