112 lines
2.7 KiB
C#
112 lines
2.7 KiB
C#
//
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// In.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.Collections;
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using System.Data;
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namespace Mono.Data.SqlExpressions {
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internal class In : UnaryExpression {
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IList set;
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public In(IExpression e, IList set) : base (e)
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{
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this.set = set;
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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 In))
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return false;
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In other = (In) obj;
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if (other.set.Count != set.Count)
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return false;
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for (int i = 0, count = set.Count; i < count; i++) {
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object o1 = set[i];
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object o2 = other.set[i];
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if (o1 == null && o2 != null)
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return false;
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if (!o1.Equals(o2))
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return false;
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}
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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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int hashCode = base.GetHashCode ();
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for (int i = 0, count = set.Count; i < count; i++) {
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object o = set[i];
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if (o != null)
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hashCode ^= o.GetHashCode();
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}
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return hashCode;
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}
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override public object Eval (DataRow row)
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{
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object o = expr.Eval (row);
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if (o == DBNull.Value)
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return o;
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IComparable val = o as IComparable;
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if (val == null)
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return false;
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foreach (IExpression e in set) {
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IComparable setItem = (IComparable)e.Eval (row);
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if (setItem == null)
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continue;
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if (Comparison.Compare (val, setItem, row.Table.CaseSensitive) == 0)
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return true;
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}
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return false;
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}
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override public bool EvalBoolean (DataRow row)
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{
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return (bool) Eval (row);
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}
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}
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}
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