DocInverter.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.Collections.Generic;
using Lucene.Net.Support;

namespace Lucene.Net.Index
{
    
    /// <summary>This is a DocFieldConsumer that inverts each field,
    /// separately, from a Document, and accepts a
    /// InvertedTermsConsumer to process those terms. 
    /// </summary>
    
    sealed class DocInverter : DocFieldConsumer
    {
        
        internal InvertedDocConsumer consumer;
        internal InvertedDocEndConsumer endConsumer;
        
        public DocInverter(InvertedDocConsumer consumer, InvertedDocEndConsumer endConsumer)
        {
            this.consumer = consumer;
            this.endConsumer = endConsumer;
        }
        
        internal override void  SetFieldInfos(FieldInfos fieldInfos)
        {
            base.SetFieldInfos(fieldInfos);
            consumer.SetFieldInfos(fieldInfos);
            endConsumer.SetFieldInfos(fieldInfos);
        }

        public override void Flush(IDictionary<DocFieldConsumerPerThread, ICollection<DocFieldConsumerPerField>> threadsAndFields, SegmentWriteState state)
        {

            var childThreadsAndFields = new HashMap<InvertedDocConsumerPerThread, ICollection<InvertedDocConsumerPerField>>();
            var endChildThreadsAndFields = new HashMap<InvertedDocEndConsumerPerThread, ICollection<InvertedDocEndConsumerPerField>>();

            foreach (var entry in threadsAndFields)
            {
                var perThread = (DocInverterPerThread) entry.Key;

                ICollection<InvertedDocConsumerPerField> childFields = new HashSet<InvertedDocConsumerPerField>();
                ICollection<InvertedDocEndConsumerPerField> endChildFields = new HashSet<InvertedDocEndConsumerPerField>();
                foreach(DocFieldConsumerPerField field in entry.Value)
                {
                    var perField = (DocInverterPerField)field;
                    childFields.Add(perField.consumer);
                    endChildFields.Add(perField.endConsumer);
                }
                
                childThreadsAndFields[perThread.consumer] = childFields;
                endChildThreadsAndFields[perThread.endConsumer] = endChildFields;
            }
            
            consumer.Flush(childThreadsAndFields, state);
            endConsumer.Flush(endChildThreadsAndFields, state);
        }

        public override void  CloseDocStore(SegmentWriteState state)
        {
            consumer.CloseDocStore(state);
            endConsumer.CloseDocStore(state);
        }
        
        public override void  Abort()
        {
            consumer.Abort();
            endConsumer.Abort();
        }
        
        public override bool FreeRAM()
        {
            return consumer.FreeRAM();
        }
        
        public override DocFieldConsumerPerThread AddThread(DocFieldProcessorPerThread docFieldProcessorPerThread)
        {
            return new DocInverterPerThread(docFieldProcessorPerThread, this);
        }
    }
}