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using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Linq.Expressions;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Data.Linq;
namespace System.Data.Linq.SqlClient {
// SQL Client extensions to ExpressionType
internal enum InternalExpressionType {
Known = 2000,
LinkedTable = 2001
}
abstract internal class InternalExpression : Expression {
#pragma warning disable 618 // Disable the 'obsolete' warning.
internal InternalExpression(InternalExpressionType nt, Type type)
: base ((ExpressionType)nt, type) {
}
#pragma warning restore 618
internal static KnownExpression Known(SqlExpression expr) {
return new KnownExpression(expr, expr.ClrType);
}
internal static KnownExpression Known(SqlNode node, Type type) {
return new KnownExpression(node, type);
}
}
internal sealed class KnownExpression : InternalExpression {
SqlNode node;
internal KnownExpression(SqlNode node, Type type)
: base(InternalExpressionType.Known, type) {
this.node = node;
}
internal SqlNode Node {
get { return this.node; }
}
}
internal sealed class LinkedTableExpression : InternalExpression {
private SqlLink link;
private ITable table;
internal LinkedTableExpression(SqlLink link, ITable table, Type type)
: base(InternalExpressionType.LinkedTable, type) {
this.link = link;
this.table = table;
}
internal SqlLink Link {
get {return this.link;}
}
internal ITable Table {
get {return this.table;}
}
}
}
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