/// <summary>
/// Creates the command definition wrapper for a given provider manifest and command tree.
/// </summary>
/// <param name="providerManifest">The provider manifest.</param>
/// <param name="commandTree">The command tree.</param>
/// <returns><see cref="DbCommandDefinition"/> object.</returns>
protected override System.Data.Entity.Core.Common.DbCommandDefinition CreateDbCommandDefinition(System.Data.Entity.Core.Common.DbProviderManifest providerManifest, System.Data.Entity.Core.Common.CommandTrees.DbCommandTree commandTree)
{
var wrapperManifest = (DbProviderManifestWrapper)providerManifest;
var createDbCommandDefinitionFunction = this.GetCreateDbCommandDefinitionFunction(wrapperManifest.WrappedProviderManifestInvariantName);
System.Data.Entity.Core.Common.DbCommandDefinition definition = createDbCommandDefinitionFunction(wrapperManifest.WrappedProviderManifest, commandTree);
return(this.CreateCommandDefinitionWrapper(definition, commandTree));
}
private static void PopulateBinaryParameter(
DbParameter parameter,
TypeUsage type,
DbType dbType,
bool isOutParam)
{
parameter.DbType = dbType;
DbCommandDefinition.SetParameterSize(parameter, type, isOutParam);
}
private static void PopulateStringParameter(
DbParameter parameter,
TypeUsage type,
bool isOutParam)
{
bool isUnicode = true;
bool isFixedLength = false;
if (!TypeHelpers.TryGetIsFixedLength(type, out isFixedLength))
{
isFixedLength = false;
}
if (!TypeHelpers.TryGetIsUnicode(type, out isUnicode))
{
isUnicode = true;
}
parameter.DbType = !isFixedLength ? (isUnicode ? DbType.String : DbType.AnsiString) : (isUnicode ? DbType.StringFixedLength : DbType.AnsiStringFixedLength);
DbCommandDefinition.SetParameterSize(parameter, type, isOutParam);
}
internal static void PopulateParameterFromTypeUsage(
DbParameter parameter,
TypeUsage type,
bool isOutParam)
{
parameter.IsNullable = TypeSemantics.IsNullable(type);
DbType dbType;
if (!Helper.IsPrimitiveType(type.EdmType) || !DbCommandDefinition.TryGetDbTypeFromPrimitiveType((PrimitiveType)type.EdmType, out dbType))
{
return;
}
switch (dbType)
{
case DbType.Binary:
DbCommandDefinition.PopulateBinaryParameter(parameter, type, dbType, isOutParam);
break;
case DbType.DateTime:
case DbType.Time:
case DbType.DateTimeOffset:
DbCommandDefinition.PopulateDateTimeParameter(parameter, type, dbType);
break;
case DbType.Decimal:
DbCommandDefinition.PopulateDecimalParameter(parameter, type, dbType);
break;
case DbType.String:
DbCommandDefinition.PopulateStringParameter(parameter, type, isOutParam);
break;
default:
parameter.DbType = dbType;
break;
}
}
/// <summary>
/// Create the default DbCommandDefinition object based on the prototype command
/// This method is intended for provider writers to build a default command definition
/// from a command.
/// Note: This will clone the prototype
/// </summary>
/// <param name="prototype"> the prototype command </param>
/// <returns> an executable command definition object </returns>
public virtual DbCommandDefinition CreateCommandDefinition(DbCommand prototype)
{
return(DbCommandDefinition.CreateCommandDefinition(prototype));
}
/// <summary>
/// Creates the command definition wrapper.
/// </summary>
/// <param name="wrappedCommandDefinition">The wrapped command definition.</param>
/// <param name="commandTree">The command tree.</param>
/// <returns><see cref="DbCommandDefinitionWrapper"/> object.</returns>
public virtual DbCommandDefinitionWrapper CreateCommandDefinitionWrapper(System.Data.Entity.Core.Common.DbCommandDefinition wrappedCommandDefinition, System.Data.Entity.Core.Common.CommandTrees.DbCommandTree commandTree)
{
return(new DbCommandDefinitionWrapper(wrappedCommandDefinition, commandTree, (cmd, def) => EFDbCommandFactory.GetCommandWrapper(cmd, def)));
}
internal EFCachingCommandDefinition(System.Data.Entity.Core.Common.DbCommandDefinition wrappedCommandDefinition, System.Data.Entity.Core.Common.CommandTrees.DbCommandTree commandTree)
: base(wrappedCommandDefinition, commandTree, (cmd, def) => EFDbCommandFactory.GetCommandWrapper(cmd, def))
{
this.GetAffectedEntitySets(commandTree);
}
/// <summary>
/// Initializes a new instance of the DbCommandDefinitionWrapper class.
/// </summary>
/// <param name="wrappedCommandDefinition">The wrapped command definition.</param>
/// <param name="commandTree">The command tree.</param>
/// <param name="commandCreator">The command creator delegate.</param>
public DbCommandDefinitionWrapper(System.Data.Entity.Core.Common.DbCommandDefinition wrappedCommandDefinition, System.Data.Entity.Core.Common.CommandTrees.DbCommandTree commandTree, Func <DbCommand, DbCommandDefinitionWrapper, DbCommand> commandCreator)
{
this.wrappedCommandDefinition = wrappedCommandDefinition;
this.commandTree = commandTree;
this.commandCreator = commandCreator;
}
