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
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15 // "Software"), to deal in the Software without restriction, including
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18 // permit persons to whom the Software is furnished to do so, subject to
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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));
46 override public bool EvalBoolean (DataRow row)
48 return !expr.EvalBoolean (row);
52 internal class BoolOperation : BinaryOpExpression {
53 public BoolOperation (Operation op, IExpression e1, IExpression e2) : base (op, e1, e2) {}
55 override public object Eval (DataRow row)
57 return EvalBoolean (row);
60 override public bool EvalBoolean (DataRow row)
62 if (op == Operation.OR)
63 return (expr1.EvalBoolean (row)) || (expr2.EvalBoolean (row));
64 if (op == Operation.AND)
65 return (expr1.EvalBoolean (row)) && (expr2.EvalBoolean (row));