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// Copyright (C) 2015, The Duplicati Team
// http://www.duplicati.com, info@duplicati.com
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
using System;
namespace Duplicati.Library.Utility
{
public class JoinedFilterExpression : IFilter
{
public readonly IFilter First;
public readonly IFilter Second;
public JoinedFilterExpression(IFilter first, IFilter second)
{
this.First = first ?? new FilterExpression();
this.Second = second ?? new FilterExpression();
}
public bool Matches(string entry, out bool result, out IFilter match)
{
return First.Matches(entry, out result, out match) || Second.Matches(entry, out result, out match);
}
public bool Empty { get { return First.Empty && Second.Empty; } }
public static IFilter Join(IFilter first, IFilter second)
{
if (first == null && second == null)
return null;
else if (first == null)
return second;
else if (second == null)
return first;
else if (first.Empty)
return second;
else if (second.Empty)
return first;
else
{
if (first is FilterExpression && second is FilterExpression && ((FilterExpression)first).Result == ((FilterExpression)second).Result)
return FilterExpression.Combine((FilterExpression)first, (FilterExpression)second);
return new JoinedFilterExpression(first, second);
}
}
public override string ToString()
{
if (this.First.Empty)
return this.Second.ToString();
else if (this.Second.Empty)
return this.First.ToString();
else
return "(" + this.First.ToString() + ") || (" + this.Second.ToString() + ")";
}
}
}
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