Scorer.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.Index;

namespace Lucene.Net.Search
{
    
    public abstract class Scorer:DocIdSetIterator
    {
        private Similarity similarity;
        
        protected internal Scorer(Similarity similarity)
        {
            this.similarity = similarity;
        }

        public virtual Similarity Similarity
        {
            get { return this.similarity; }
        }

        public virtual void  Score(Collector collector)
        {
            collector.SetScorer(this);
            int doc;
            while ((doc = NextDoc()) != NO_MORE_DOCS)
            {
                collector.Collect(doc);
            }
        }
        
        public /*protected internal*/ virtual bool Score(Collector collector, int max, int firstDocID)
        {
            collector.SetScorer(this);
            int doc = firstDocID;
            while (doc < max)
            {
                collector.Collect(doc);
                doc = NextDoc();
            }
            return doc != NO_MORE_DOCS;
        }
        
        public abstract float Score();
    }
}