/// <summary>Loads a ObjectTree 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 ObjectTree Table.
ServerMarketData.ObjectTreeDataTable objectTreeTable = ServerMarketData.ObjectTree;
// Extract the parameters from the command batch.
AdoTransaction adoTransaction = parameters["adoTransaction"];
SqlTransaction sqlTransaction = parameters["sqlTransaction"];
object configurationId = parameters["configurationId"].Value;
object externalObjectTreeId = parameters["objectTreeId"].Value;
string externalChildId = parameters["childId"];
string externalParentId = parameters["parentId"];
object externalId0 = parameters["externalId0"].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 objectTreeId = ObjectTree.FindKey(configurationId, "objectTreeId", externalObjectTreeId);
int childId = Object.FindRequiredKey(configurationId, "childId", externalChildId);
int parentId = Object.FindRequiredKey(configurationId, "parentId", externalParentId);
// 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 ((objectTreeId == 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 = ObjectTree.GetExternalKeyIndex(configurationId, "objectTreeId");
object[] externalIdArray = new object[1];
externalIdArray[externalKeyIndex] = externalObjectTreeId;
externalId0 = externalIdArray[0];
// Call the internal method to complete the operation.
MarkThree.Guardian.Core.ObjectTree.Insert(adoTransaction, sqlTransaction, ref rowVersion, childId, parentId, externalId0);
}
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.ObjectTreeRow objectTreeRow = objectTreeTable.FindByObjectTreeId(objectTreeId);
rowVersion = ((long)(objectTreeRow[objectTreeTable.RowVersionColumn]));
// Call the internal method to complete the operation.
MarkThree.Guardian.Core.ObjectTree.Update(adoTransaction, sqlTransaction, ref rowVersion, objectTreeId, childId, parentId, externalId0);
}
// Return values.
parameters["rowVersion"] = rowVersion;
}
/// <summary>Finds a a ObjectTree 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 ObjectTree Table.
ServerMarketData.ObjectTreeDataTable objectTreeTable = ServerMarketData.ObjectTree;
// 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 = ObjectTree.GetExternalKeyIndex(configurationId, parameterId);
System.Data.DataView externalKeyView = ObjectTree.externalKeyArray[externalKeyIndex];
int recordIndex = externalKeyView.Find(new object[] {
externalId});
if ((recordIndex == -1))
{
return int.MinValue;
}
return ((int)(externalKeyView[recordIndex].Row[objectTreeTable.ObjectTreeIdColumn]));
}