public static IQuerySelection Field <T>(Expression <Func <T, object> > prop, String alias)
{
var entityType = typeof(T);
var fieldName = ReflectionUtils.GetPropertyNameFromExpression(prop);
return(Expression(SelectExpr.Build().Field(entityType, fieldName, alias)));
}
private static IQuerySelection Expression(SelectExpr expr)
{
var expressionSelection =
(AbstractExpressionSelection)_factory.CreateSelection(QuerySelectionExpressionType.Expression);
expressionSelection.Expr = expr;
return(expressionSelection);
}
public override void AcceptChildren(WSqlFragmentVisitor visitor)
{
if (SelectExpr != null)
{
SelectExpr.Accept(visitor);
}
base.AcceptChildren(visitor);
}
public static IQuerySelection Query(ISelectionQuery query, String alias)
{
var expressionSelection =
(AbstractExpressionSelection)_factory.CreateSelection(QuerySelectionExpressionType.Expression);
expressionSelection.Expr = SelectExpr.Build().Query(query, alias);
return(expressionSelection);
}
public override void WriteToStream(IndentStream stream)
{
stream.Write("CURSOR");
if (Options != null && Options.Count > 0)
{
stream.Write(" ");
var code = string.Join(" ", Options);
stream.Write(code);
}
stream.Write(" FOR ");
SelectExpr.WriteToStream(stream);
}
/// <summary>
/// Serves as a hash function for a particular type.
/// </summary>
/// <returns>A hash code for the current Object.</returns>
public override int GetHashCode()
{
return(SelectExpr.GetHashCode());
}
public static IQuerySelection Sum <T>(Expression <Func <T, object> > prop, String alias)
{
return(Expression(SelectExpr.Build().Field(prop, alias).Sum()));
}
public static IQuerySelection Sum(Type entityType, String field, String alias)
{
return(Expression(SelectExpr.Build().Field(entityType, field, alias).Sum()));
}
public static IQuerySelection Field(String field, String alias)
{
return(Expression(SelectExpr.Build().Field(field, alias)));
}
public static IQuerySelection CustFunction <T>(String sqlFunction, Expression <Func <T, object> > prop, String alias)
{
return(Expression(SelectExpr.Build().Field(prop, alias).CustFunc(sqlFunction)));
}
public static IQuerySelection CustFunction(String sqlFunction, Type entityType, String field, String alias)
{
return(Expression(SelectExpr.Build().Field(entityType, field, alias).CustFunc(sqlFunction)));
}
internal override string ToString(string indent)
{
var line = SelectExpr.ToString(indent);
return(ColumnName != null?string.Format(CultureInfo.CurrentCulture, "{0} AS {1}", line, ColumnName) : line);
}
internal override bool OneLine()
{
return(SelectExpr.OneLine());
}