/// <summary>Loads a VolumeCategory record using Metadata Parameters.</summary>
/// <param name="transaction">Contains the parameters and exceptions for this command.</param>
public static void Load(ParameterList parameters)
{
// Accessor for the VolumeCategory Table.
ServerMarketData.VolumeCategoryDataTable volumeCategoryTable = ServerMarketData.VolumeCategory;
// Extract the parameters from the command batch.
AdoTransaction adoTransaction = parameters["adoTransaction"];
SqlTransaction sqlTransaction = parameters["sqlTransaction"];
object configurationId = parameters["configurationId"].Value;
object description = parameters["description"].Value;
object externalId0 = parameters["externalId0"].Value;
object highVolumeRange = parameters["highVolumeRange"].Value;
decimal lowVolumeRange = parameters["lowVolumeRange"];
string mnemonic = parameters["mnemonic"];
object externalVolumeCategoryId = parameters["volumeCategoryId"].Value;
// The row versioning is largely disabled for external operations. The value is returned to the caller in the
// event it's needed for operations within the batch.
long rowVersion = long.MinValue;
// Resolve External Identifiers
int volumeCategoryId = VolumeCategory.FindKey(configurationId, "volumeCategoryId", externalVolumeCategoryId);
// The load operation will create a record if it doesn't exist, or update an existing record. The external
// identifier is used to determine if a record exists with the same key.
if ((volumeCategoryId == int.MinValue))
{
// Populate the 'externalId' varaibles so that the external identifier can be used to find the row when an
// external method is called with the same 'configurationId' parameter.
int externalKeyIndex = VolumeCategory.GetExternalKeyIndex(configurationId, "volumeCategoryId");
object[] externalIdArray = new object[1];
externalIdArray[externalKeyIndex] = externalVolumeCategoryId;
externalId0 = externalIdArray[0];
// Call the internal method to complete the operation.
MarkThree.Guardian.Core.VolumeCategory.Insert(adoTransaction, sqlTransaction, ref rowVersion, description, externalId0, highVolumeRange, lowVolumeRange, mnemonic);
}
else
{
// While the optimistic concurrency checking is disabled for the external methods, the internal methods
// still need to perform the check. This ncurrency checking logic by finding the current row version to be
// will bypass the coused when the internal method is called.
ServerMarketData.VolumeCategoryRow volumeCategoryRow = volumeCategoryTable.FindByVolumeCategoryId(volumeCategoryId);
rowVersion = ((long)(volumeCategoryRow[volumeCategoryTable.RowVersionColumn]));
// Call the internal method to complete the operation.
MarkThree.Guardian.Core.VolumeCategory.Update(adoTransaction, sqlTransaction, ref rowVersion, description, externalId0, highVolumeRange, lowVolumeRange, mnemonic, volumeCategoryId);
}
// Return values.
parameters["rowVersion"] = rowVersion;
}
/// <summary>Finds a a VolumeCategory record using a configuration and an external identifier.</summary>
/// <param name="configurationId">Specified which mappings (user id columns) to use when looking up external identifiers.</param>
/// <param name="parameterId">The name of the parameter as specified in the configuration table.</param>
/// <param name="externalId">The external (user supplied) identifier for the record.</param>
public static int FindKey(object configurationId, string parameterId, object externalId)
{
// A missing key will never match a column.
if ((externalId == null))
{
return int.MinValue;
}
// Accessor for the VolumeCategory Table.
ServerMarketData.VolumeCategoryDataTable volumeCategoryTable = ServerMarketData.VolumeCategory;
// Look for the record using the external identifier. The configuration selected the key to use, which effectively
// selected the external id column to use for the search. If a record is found in the view, a translation still needs
// to be made back to the original table before an index to the record can be returned to the caller.
int externalKeyIndex = VolumeCategory.GetExternalKeyIndex(configurationId, parameterId);
System.Data.DataView externalKeyView = VolumeCategory.externalKeyArray[externalKeyIndex];
int recordIndex = externalKeyView.Find(new object[] {
externalId});
if ((recordIndex == -1))
{
return int.MinValue;
}
return ((int)(externalKeyView[recordIndex].Row[volumeCategoryTable.VolumeCategoryIdColumn]));
}