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.Map;
  
  abstract class DocFieldConsumer {
  
    FieldInfos fieldInfos;
  
    /** Called when DocumentsWriter decides to create a new
     *  segment */
    abstract void flush(Map<DocFieldConsumerPerThread,Collection<DocFieldConsumerPerField>> threadsAndFields, SegmentWriteState state) throws IOException;
  
    /** Called when an aborting exception is hit */
    abstract void abort();
  
    /** Add a new thread */
    abstract DocFieldConsumerPerThread addThread(DocFieldProcessorPerThread docFieldProcessorPerThread) throws IOException;
  
    /** Called when DocumentsWriter is using too much RAM.
     *  The consumer should free RAM, if possible, returning
     *  true if any RAM was in fact freed. */
    abstract boolean freeRAM();
  
    void setFieldInfos(FieldInfos fieldInfos) {
      this.fieldInfos = fieldInfos;
    }
  }
  