/// <summary>Loads a Algorithm 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 Algorithm Table.
ServerDataModel.AlgorithmDataTable algorithmTable = ServerDataModel.Algorithm;
// Extract the parameters from the command batch.
AdoTransaction adoTransaction = parameters["adoTransaction"];
SqlTransaction sqlTransaction = parameters["sqlTransaction"];
object configurationId = parameters["configurationId"].Value;
object externalAlgorithmId = parameters["algorithmId"].Value;
string externalAlgorithmTypeCode = parameters["algorithmTypeCode"];
string name = parameters["name"];
object description = parameters["description"].Value;
string assembly = parameters["assembly"];
string type = parameters["type"];
string method = parameters["method"];
object externalId0 = parameters["externalId0"].Value;
object externalId1 = parameters["externalId1"].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 algorithmId = Algorithm.FindKey(configurationId, "algorithmId", externalAlgorithmId);
int algorithmTypeCode = AlgorithmType.FindRequiredKey(configurationId, "algorithmTypeCode", externalAlgorithmTypeCode);
// 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 ((algorithmId == 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 = Algorithm.GetExternalKeyIndex(configurationId, "algorithmId");
object[] externalIdArray = new object[2];
externalIdArray[externalKeyIndex] = externalAlgorithmId;
externalId0 = externalIdArray[0];
externalId1 = externalIdArray[1];
// Call the internal method to complete the operation.
MarkThree.Quasar.Core.Algorithm.Insert(adoTransaction, sqlTransaction, ref rowVersion, algorithmTypeCode, name, description, assembly, type, method, externalId0, externalId1);
}
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.
ServerDataModel.AlgorithmRow algorithmRow = algorithmTable.FindByAlgorithmId(algorithmId);
rowVersion = ((long)(algorithmRow[algorithmTable.RowVersionColumn]));
// Call the internal method to complete the operation.
MarkThree.Quasar.Core.Algorithm.Update(adoTransaction, sqlTransaction, ref rowVersion, algorithmId, algorithmTypeCode, name, description, assembly, type, method, externalId0, externalId1);
}
// Return values.
parameters["rowVersion"] = rowVersion;
}
/// <summary>Finds a a Algorithm 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 Algorithm Table.
ServerDataModel.AlgorithmDataTable algorithmTable = ServerDataModel.Algorithm;
// 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 = Algorithm.GetExternalKeyIndex(configurationId, parameterId);
System.Data.DataView externalKeyView = Algorithm.externalKeyArray[externalKeyIndex];
int recordIndex = externalKeyView.Find(new object[] {
externalId});
if ((recordIndex == -1))
{
return int.MinValue;
}
return ((int)(externalKeyView[recordIndex].Row[algorithmTable.AlgorithmIdColumn]));
}
