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QueryParser.cs

//
// QueryParser.cs
//
// Author:
//   Aaron Bockover <abockover@novell.com>
//   Gabriel Burt <gburt@novell.com>
//
// Copyright (C) 2007 Novell, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System;
using System.IO;
using System.Text;

namespace Hyena.Query
{
    public abstract class QueryParser
    {
        protected StreamReader reader;

        public QueryParser()
        {
            Reset ();
        }

        public QueryParser(string inputQuery) : this(new MemoryStream(Encoding.UTF8.GetBytes(inputQuery)))
        {
        }

        public QueryParser(Stream stream) : this(new StreamReader(stream))
        {
        }

        public QueryParser(StreamReader reader) : this()
        {
            InputReader = reader;
        }

        public abstract QueryNode BuildTree (QueryFieldSet fieldSet);
        public abstract void Reset ();

        public StreamReader InputReader {
            get { return reader; }
            set { reader = value; }
        }
    }
}

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