/// <summary>
/// Convert expression to code.
/// </summary>
/// <param name="expression">Expression.</param>
/// <param name="converter">Expression converter.</param>
/// <returns>Parts.</returns>
public override ICode Convert(MethodCallExpression expression, ExpressionConverter converter)
{
//ALL, DISTINCT, TOP
int expressionIndex = expression.SkipMethodChain(0);
var selectParts = new ICode[expression.Arguments.Count - expressionIndex];
selectParts[0] = SelectClause;
for (int i = 0; i < selectParts.Length - 1; i++, expressionIndex++)
{
selectParts[i + 1] = converter.ConvertToCode(expression.Arguments[expressionIndex]);
}
var select = LineSpace(selectParts);
//select elemnts.
var selectTargets = expression.Arguments[expression.Arguments.Count - 1];
//*
if (typeof(IAsterisk).IsAssignableFromEx(selectTargets.Type))
{
select.Add("*".ToCode());
return new SelectClauseCode(select);
}
//new []{ a, b, c} recursive.
else if (selectTargets.Type.IsArray)
{
var newArrayExp = selectTargets as NewArrayExpression;
var array = new ICode[newArrayExp.Expressions.Count];
for (int i = 0; i < array.Length; i++)
{
array[i] = converter.ConvertToCode(newArrayExp.Expressions[i]);
}
var coreCode = new VCode(select, new VCode(array) { Indent = 1, Separator = "," });
return new SelectClauseCode(coreCode);
}
//new { item = db.tbl.column }
else
{
var createInfo = ObjectCreateAnalyzer.MakeSelectInfo(selectTargets);
var elements = new ICode[createInfo.Members.Length];
for (int i = 0; i < elements.Length; i++)
{
elements[i] = ConvertSelectedElement(converter, createInfo.Members[i]);
}
var coreCode = new VCode(select, new VCode(elements) { Indent = 1, Separator = "," });
return new SelectClauseCode(coreCode);
}
}
/// <summary>
/// Accept customizer.
/// </summary>
/// <param name="customizer">Customizer.</param>
/// <returns>Destination.</returns>
public ICode Accept(ICodeCustomizer customizer)
{
var dst = customizer.Visit(this);
if (!ReferenceEquals(this, dst))
{
return(dst);
}
var hDst = new VCode()
{
Indent = Indent, Separator = Separator
};
foreach (var e in _core)
{
hDst._core.Add(e.Accept(customizer));
}
return(hDst);
}
/// <summary>
/// Accept customizer.
/// </summary>
/// <param name="customizer">Customizer.</param>
/// <returns>Destination.</returns>
public ICode Accept(ICodeCustomizer customizer)
{
var dst = customizer.Visit(this);
if (!ReferenceEquals(this, dst)) return dst;
var hDst = new VCode() { Indent = Indent, Separator = Separator };
foreach (var e in _core)
{
hDst._core.Add(e.Accept(customizer));
}
return hDst;
}
