using Lucene.Net.Search;
using Lucene.Net.Search.Spans;
using System.Xml;

namespace Lucene.Net.QueryParsers.Xml.Builders
{
    /*
     * Licensed to the Apache Software Foundation (ASF) under one or more
     * contributor license agreements.  See the NOTICE file distributed with
     * this work for additional information regarding copyright ownership.
     * The ASF licenses this file to You under the Apache License, Version 2.0
     * (the "License"); you may not use this file except in compliance with
     * the License.  You may obtain a copy of the License at
     *
     *     http://www.apache.org/licenses/LICENSE-2.0
     *
     * Unless required by applicable law or agreed to in writing, software
     * distributed under the License is distributed on an "AS IS" BASIS,
     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     * See the License for the specific language governing permissions and
     * limitations under the License.
     */

    /// <summary>
    /// Base class for building <see cref="Search.Spans.SpanQuery"/>s
    /// </summary>
    public abstract class SpanBuilderBase : ISpanQueryBuilder
    {
        public virtual Query GetQuery(XmlElement e)
        {
            return GetSpanQuery(e);
        }

        /// <summary>
        /// LUCENENET specific - must provide declaration of GetSpanQuery to satisfy
        /// contract of <see cref="ISpanQueryBuilder"/>
        /// </summary>
        public abstract SpanQuery GetSpanQuery(XmlElement e);
    }
}