content: package org.apache.lucene.index;
  
  /**
   * 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.
   */
  
  import java.io.IOException;
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.HashSet;
  
  import java.util.Map;
  
  
  /** This is a DocFieldConsumer that inverts each field,
   *  separately, from a Document, and accepts a
   *  InvertedTermsConsumer to process those terms. */
  
  final class DocInverter extends DocFieldConsumer {
  
    final InvertedDocConsumer consumer;
    final InvertedDocEndConsumer endConsumer;
  
    public DocInverter(InvertedDocConsumer consumer, InvertedDocEndConsumer endConsumer) {
      this.consumer = consumer;
      this.endConsumer = endConsumer;
    }
  
    @Override
    void setFieldInfos(FieldInfos fieldInfos) {
      super.setFieldInfos(fieldInfos);
      consumer.setFieldInfos(fieldInfos);
      endConsumer.setFieldInfos(fieldInfos);
    }
  
    @Override
    void flush(Map<DocFieldConsumerPerThread, Collection<DocFieldConsumerPerField>> threadsAndFields, SegmentWriteState state) throws IOException {
  
      Map<InvertedDocConsumerPerThread,Collection<InvertedDocConsumerPerField>> childThreadsAndFields = new HashMap<InvertedDocConsumerPerThread,Collection<InvertedDocConsumerPerField>>();
      Map<InvertedDocEndConsumerPerThread,Collection<InvertedDocEndConsumerPerField>> endChildThreadsAndFields = new HashMap<InvertedDocEndConsumerPerThread,Collection<InvertedDocEndConsumerPerField>>();
  
      for (Map.Entry<DocFieldConsumerPerThread,Collection<DocFieldConsumerPerField>> entry : threadsAndFields.entrySet() ) {
        DocInverterPerThread perThread = (DocInverterPerThread) entry.getKey();
  
        Collection<InvertedDocConsumerPerField> childFields = new HashSet<InvertedDocConsumerPerField>();
        Collection<InvertedDocEndConsumerPerField> endChildFields = new HashSet<InvertedDocEndConsumerPerField>();
        for (final DocFieldConsumerPerField field: entry.getValue() ) {  
          DocInverterPerField perField = (DocInverterPerField) field;
          childFields.add(perField.consumer);
          endChildFields.add(perField.endConsumer);
        }
  
        childThreadsAndFields.put(perThread.consumer, childFields);
        endChildThreadsAndFields.put(perThread.endConsumer, endChildFields);
      }
      
      consumer.flush(childThreadsAndFields, state);
      endConsumer.flush(endChildThreadsAndFields, state);
    }
  
    @Override
    void abort() {
      try {
        consumer.abort();
      } finally {
        endConsumer.abort();
      }
    }
  
    @Override
    public boolean freeRAM() {
      return consumer.freeRAM();
    }
  
    @Override
    public DocFieldConsumerPerThread addThread(DocFieldProcessorPerThread docFieldProcessorPerThread) {
      return new DocInverterPerThread(docFieldProcessorPerThread, this);
    }
  }
  