internal XsdtAttribute GetXsdtAttrFor(XsdtPrimitiveDataType dt)
{
FieldInfo fi = dt.GetType().GetField(dt.ToString());
var attrs = (XsdtAttribute[])fi.GetCustomAttributes(typeof(XsdtAttribute), false);
return(attrs[0]); // I know by design that there will be one and only one attribute in this array.
}
public void Equal(Expression e)
{
Expression lh;
Expression rh;
if (e is BinaryExpression)
{
BinaryExpression be = e as BinaryExpression;
lh = be.Left;
rh = be.Right;
}
else if (e is MethodCallExpression)
{
MethodCallExpression mce = e as MethodCallExpression;
lh = mce.Arguments[0];
rh = mce.Arguments[1];
}
else
{
throw new LinqToRdfException("Unrecognised equality expression type");
}
if (lh != null && rh != null)
{
XsdtPrimitiveDataType dt = TypeTranslator.GetDataType(lh.Type);
if (dt == XsdtPrimitiveDataType.XsdtString)
{
QueryAppend("regex(");
Dispatch(lh);
QueryAppend(", ");
Dispatch(rh);
QueryAppend(") ");
}
else
{
//QueryAppend("(");
Dispatch(lh);
QueryAppend(" = ");
//QueryAppend(")=(");
Dispatch(rh);
//QueryAppend(")");
//Log("+ :{0} Handled", e.NodeType);
}
}
else
{
Log("Failure during generation of Equal expression");
}
}
internal string GetStringRepresentationFor <T>(T obj, XsdtPrimitiveDataType dt, XsdtAttribute attr)
{
return(obj.ToString());
}
public string GetXsdtDateRepresentationFor(DateTime d, XsdtPrimitiveDataType dt, XsdtAttribute attr)
{
// TODO: the time zone offset needs to be returned from somewhere...
return(d.ToString("yyyy-MM-ddTHH:mm:sszzz"));
}
public object Get(Type t, object obj)
{
//PORT: Convert this just to use SparqlFormatter instead?
string result = "";
XsdtPrimitiveDataType dt = GetDataType(t);
XsdtAttribute attr = GetXsdtAttrFor(dt);
//if (dt == XsdtPrimitiveDataType.XsdtUnknown)
//{
// return this._formatter.Format(this._g.CreateLiteralNode(obj.ToString()));
//}
//else
//{
// XsdtAttribute attr = GetXsdtAttrFor(dt);
//}
if (dt == XsdtPrimitiveDataType.XsdtUnknown)
{
if (t == typeof(char))
{
return("\"" + obj + "\"");
}
else if (attr.IsQuoted)
{
return("\"" + obj + "\"");
}
else
{
return(obj.ToString());
}
}
switch (t.FullName)
{
case "System.DateTime":
result = GetXsdtDateRepresentationFor((DateTime)obj, dt, attr);
break;
case "System.Byte[]":
result = Encoding.ASCII.GetString((Byte[])obj);
break;
default:
result = GetStringRepresentationFor(obj, dt, attr);
break;
}
if (attr.IsQuoted)
{
result = "\"" + result + "\"";
}
string xsdTypeSuffix;
if (dt != XsdtPrimitiveDataType.XsdtInt && dt != XsdtPrimitiveDataType.XsdtString)
{
xsdTypeSuffix = "^^xsd:" + attr.TypeUri;
}
else
{
xsdTypeSuffix = "";
}
return(result + xsdTypeSuffix);
}
