Shaolinq.Persistence.DefaultSqlTransactionalCommandsContext.BuildDeleteExpression C# (CSharp) Method

		public virtual Expression BuildDeleteExpression(Type type, IEnumerable<DataAccessObject> dataAccessObjects)
		{
			var typeDescriptor = this.DataAccessModel.GetTypeDescriptor(type);
			var parameter = Expression.Parameter(typeDescriptor.Type, "value");

			Expression body = null;

			foreach (var dataAccessObject in dataAccessObjects)
			{
				var currentExpression = Expression.Equal(parameter, Expression.Constant(dataAccessObject));

				if (body == null)
				{
					body = currentExpression;
				}
				else
				{
					body = Expression.OrElse(body, currentExpression);
				}
			}

			if (body == null)
			{
				return null;
			}
			
			var condition = Expression.Lambda(body, parameter);
			var expression = (Expression)Expression.Call(Expression.Constant(this.DataAccessModel), MethodInfoFastRef.DataAccessModelGetDataAccessObjectsMethod.MakeGenericMethod(typeDescriptor.Type));

			expression = Expression.Call(MethodInfoFastRef.QueryableWhereMethod.MakeGenericMethod(typeDescriptor.Type), expression, Expression.Quote(condition));
			expression = Expression.Call(MethodInfoFastRef.QueryableExtensionsDeleteMethod.MakeGenericMethod(typeDescriptor.Type), expression);

			return expression;
		}