public Literal(object[] pair)
{
switch ((int)pair[0])
{
case 0: Vid = LiteralVidEnumeration.unknown; break;
case 1: Vid = LiteralVidEnumeration.integer;
Value = pair[1];
break;
case 2: Vid = LiteralVidEnumeration.text;
object[] text_pair = (object[])pair[1];
Value = new Text()
{
Value = (string)text_pair[0], Lang = (string)text_pair[1]
};
break;
case 3: Vid = LiteralVidEnumeration.date;
Value = pair[1]; // Надо как-то по-другому
break;
default: throw new Exception("Err: 20901");
}
}
internal static Expression LiteraExpression(Expression literalValueExpr, LiteralVidEnumeration literalVidEnumeration)
{
Type type = null;
switch (literalVidEnumeration)
{
case LiteralVidEnumeration.text:
return(Expression.Property(
Expression.Convert(literalValueExpr, typeof(Text)),
"Value"));
case LiteralVidEnumeration.typedObject:
return(Expression.Property(
Expression.Convert(literalValueExpr, typeof(TypedObject)),
"Value"));
case LiteralVidEnumeration.integer:
{
return(Expression.Call(typeof(Query).GetMethod("Convert"), literalValueExpr));
}
break;
case LiteralVidEnumeration.date:
type = typeof(long);
break;
case LiteralVidEnumeration.boolean:
type = typeof(bool);
break;
case LiteralVidEnumeration.nil:
throw new NotImplementedException();
}
return(Expression.ConvertChecked(literalValueExpr, type));
}
public Literal(LiteralVidEnumeration literalVidEnumeration)
{
this.vid = literalVidEnumeration;
}
public Literal(LiteralVidEnumeration vid, IGraph graph)
{
this.vid = vid;
Graph = graph;
}
public Literal(LiteralVidEnumeration vid)
{
this.vid = vid;
}
