PhraseQueue.cs

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/* 
 * 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.
 */

using System;
using Lucene.Net.Util;

namespace Lucene.Net.Search
{
    
    sealed class PhraseQueue : PriorityQueue<PhrasePositions>
    {
        internal PhraseQueue(int size)
        {
            Initialize(size);
        }

        public override bool LessThan(PhrasePositions pp1, PhrasePositions pp2)
        {
            if (pp1.doc == pp2.doc)
                if (pp1.position == pp2.position)
                // same doc and pp.position, so decide by actual term positions. 
                // rely on: pp.position == tp.position - offset. 
                    return pp1.offset < pp2.offset;
                else
                    return pp1.position < pp2.position;
            else
                return pp1.doc < pp2.doc;
        }
    }
}