private void InternalCreateDataTable(DataTableBase dataTable, Stream stream)
{
IEnumerable <GXSegment <Stream> > dataRowSegments = null;
try
{
dataRowSegments = m_DataTableHelper.GetDataRowSegments(stream);
}
catch (Exception exception)
{
if (exception is GXException)
{
throw;
}
throw new GXException(Utility.Text.Format("Can not get data row segments with exception '{0}'.", exception.ToString()), exception);
}
if (dataRowSegments == null)
{
throw new GXException("Data row segments is invalid.");
}
foreach (GXSegment <Stream> dataRowSegment in dataRowSegments)
{
if (!dataTable.AddDataRow(dataRowSegment))
{
throw new GXException("Add data row failure.");
}
}
}
/// <summary>
/// 创建数据表。
/// </summary>
/// <param name="dataRowType">数据表行的类型。</param>
/// <param name="name">数据表名称。</param>
/// <param name="stream">要解析的数据表二进制流。</param>
/// <returns>要创建的数据表。</returns>
public DataTableBase CreateDataTable(Type dataRowType, string name, Stream stream)
{
if (dataRowType == null)
{
throw new GXException("Data row type is invalid.");
}
if (!typeof(IDataRow).IsAssignableFrom(dataRowType))
{
throw new GXException(Utility.Text.Format("Data row type '{0}' is invalid.", dataRowType.FullName));
}
TypeNamePair typeNamePair = new TypeNamePair(dataRowType, name);
if (HasDataTable(dataRowType, name))
{
throw new GXException(Utility.Text.Format("Already exist data table '{0}'.", typeNamePair.ToString()));
}
Type dataTableType = typeof(DataTable <>).MakeGenericType(dataRowType);
DataTableBase dataTable = (DataTableBase)Activator.CreateInstance(dataTableType, name);
InternalCreateDataTable(dataTable, stream);
m_DataTables.Add(typeNamePair, dataTable);
return(dataTable);
}
/// <summary>
/// 销毁数据表。
/// </summary>
/// <param name="dataTable">要销毁的数据表。</param>
/// <returns>是否销毁数据表成功。</returns>
public bool DestroyDataTable(DataTableBase dataTable)
{
if (dataTable == null)
{
throw new GXException("Data table is invalid.");
}
return(InternalDestroyDataTable(new TypeNamePair(dataTable.Type, dataTable.Name)));
}
private DataTableBase InternalGetDataTable(TypeNamePair typeNamePair)
{
DataTableBase dataTable = null;
if (m_DataTables.TryGetValue(typeNamePair, out dataTable))
{
return(dataTable);
}
return(null);
}
private bool InternalDestroyDataTable(TypeNamePair typeNamePair)
{
DataTableBase dataTable = null;
if (m_DataTables.TryGetValue(typeNamePair, out dataTable))
{
dataTable.Shutdown();
return(m_DataTables.Remove(typeNamePair));
}
return(false);
}
/// <summary>
/// 获取所有数据表。
/// </summary>
/// <returns>所有数据表。</returns>
public DataTableBase[] GetAllDataTables()
{
int index = 0;
DataTableBase[] results = new DataTableBase[m_DataTables.Count];
foreach (KeyValuePair <TypeNamePair, DataTableBase> dataTable in m_DataTables)
{
results[index++] = dataTable.Value;
}
return(results);
}
