2 // BooleanExpressions.cs
5 // Juraj Skripsky (juraj@hotfeet.ch)
7 // (C) 2004 HotFeet GmbH (http://www.hotfeet.ch)
11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
13 // Permission is hereby granted, free of charge, to any person obtaining
14 // a copy of this software and associated documentation files (the
15 // "Software"), to deal in the Software without restriction, including
16 // without limitation the rights to use, copy, modify, merge, publish,
17 // distribute, sublicense, and/or sell copies of the Software, and to
18 // permit persons to whom the Software is furnished to do so, subject to
19 // the following conditions:
21 // The above copyright notice and this permission notice shall be
22 // included in all copies or substantial portions of the Software.
24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
34 using System
.Collections
;
37 namespace Mono
.Data
.SqlExpressions
{
38 internal class Negation
: UnaryExpression
{
39 public Negation (IExpression e
) : base (e
) {}
41 override public object Eval (DataRow row
)
43 return !((bool)expr
.Eval (row
));
47 internal class BoolOperation
: BinaryOpExpression
{
48 public BoolOperation (Operation op
, IExpression e1
, IExpression e2
) : base (op
, e1
, e2
) {}
50 override public object Eval (DataRow row
)
52 if (op
== Operation
.OR
)
53 return ((bool)expr1
.Eval (row
)) || ((bool)expr2
.Eval (row
));
54 if (op
== Operation
.AND
)
55 return ((bool)expr1
.Eval (row
)) && ((bool)expr2
.Eval (row
));