80 lines
2.0 KiB
C#
80 lines
2.0 KiB
C#
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//
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// Literal.cs
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//
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// Author:
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// Juraj Skripsky (juraj@hotfeet.ch)
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//
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// (C) 2004 HotFeet GmbH (http://www.hotfeet.ch)
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//
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//
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// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Data;
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namespace Mono.Data.SqlExpressions {
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internal class Literal : BaseExpression {
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object val;
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public Literal (object val)
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{
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this.val = val;
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}
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public override bool Equals(object obj)
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{
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if (!base.Equals (obj))
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return false;
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if (!(obj is Literal))
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return false;
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Literal other = (Literal) obj;
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if (other.val != null) {
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if (!other.val.Equals (val))
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return false;
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}
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else if (val != null)
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return false;
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return true;
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}
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public override int GetHashCode()
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{
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return val.GetHashCode () ^ base.GetHashCode ();
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}
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public override object Eval (DataRow row)
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{
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return val;
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}
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override public bool DependsOn(DataColumn other)
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{
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return false;
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}
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}
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}
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