static ICode ConvertSelectedElement(ExpressionConverter converter, ObjectCreateMemberInfo element)
{
//single select.
//for example, COUNT(*).
if (string.IsNullOrEmpty(element.Name)) return converter.ConvertToCode(element.Expression);
//normal select.
return LineSpace(converter.ConvertToCode(element.Expression), "AS".ToCode(), element.Name.ToCode());
}
internal static ObjectCreateInfo MakeSelectInfo(Expression exp)
{
var select = new List<ObjectCreateMemberInfo>();
var newExp = exp as NewExpression;
if (newExp != null)
{
for (int i = 0; i < newExp.Arguments.Count; i++)
{
var propInfo = newExp.Members[i] as PropertyInfo;
string name = null;
if (propInfo != null)
{
name = propInfo.Name;
}
else
{
//.net3.5
var method = newExp.Members[i] as MethodInfo;
name = method.GetPropertyName();
}
select.Add(new ObjectCreateMemberInfo(name, newExp.Arguments[i]));
}
return new ObjectCreateInfo(select, exp);
}
var initExp = exp as MemberInitExpression;
if (initExp != null)
{
var elements = new ObjectCreateMemberInfo[initExp.Bindings.Count];
for (int i = 0; i < elements.Length; i++)
{
var e = initExp.Bindings[i] as MemberAssignment;
elements[i] = new ObjectCreateMemberInfo(e.Member.Name, e.Expression);
}
return new ObjectCreateInfo(elements, exp);
}
var member = exp as MemberExpression;
if (member != null)
{
if (SupportedTypeSpec.IsSupported(exp.Type))
{
return new ObjectCreateInfo(new[] { new ObjectCreateMemberInfo(string.Empty, exp) }, exp);
}
Type type = null;
var prop = member.Member as PropertyInfo;
if (prop != null) type = prop.PropertyType;
else type = ((FieldInfo)member.Member).FieldType;
return MakeSelectInfo(type);
}
return new ObjectCreateInfo(new[] { new ObjectCreateMemberInfo(string.Empty, exp )}, exp);
}
static ICode ConvertSelectedElement(ExpressionConverter converter, ObjectCreateMemberInfo element)
{
//single select.
//for example, COUNT(*).
if (string.IsNullOrEmpty(element.Name))
{
return(converter.ConvertToCode(element.Expression));
}
//normal select.
var exp = converter.ConvertToCode(element.Expression);
return(exp.IsEmpty ? exp : LineSpace(exp, AsClause, element.Name.ToCode()));
}