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 org.apache.lucene.util.UnicodeUtil;
  
  final class TermVectorsTermsWriterPerThread extends TermsHashConsumerPerThread {
  
    final TermVectorsTermsWriter termsWriter;
    final TermsHashPerThread termsHashPerThread;
    final DocumentsWriter.DocState docState;
  
    TermVectorsTermsWriter.PerDoc doc;
  
    public TermVectorsTermsWriterPerThread(TermsHashPerThread termsHashPerThread, TermVectorsTermsWriter termsWriter) {
      this.termsWriter = termsWriter;
      this.termsHashPerThread = termsHashPerThread;
      docState = termsHashPerThread.docState;
    }
    
    // Used by perField when serializing the term vectors
    final ByteSliceReader vectorSliceReader = new ByteSliceReader();
  
    final UnicodeUtil.UTF8Result utf8Results[] = {new UnicodeUtil.UTF8Result(),
                                                  new UnicodeUtil.UTF8Result()};
  
    @Override
    public void startDocument() {
      assert clearLastVectorFieldName();
      if (doc != null) {
        doc.reset();
        doc.docID = docState.docID;
      }
    }
  
    @Override
    public DocumentsWriter.DocWriter finishDocument() {
      try {
        return doc;
      } finally {
        doc = null;
      }
    }
  
    @Override
    public TermsHashConsumerPerField addField(TermsHashPerField termsHashPerField, FieldInfo fieldInfo) {
      return new TermVectorsTermsWriterPerField(termsHashPerField, this, fieldInfo);
    }
  
    @Override
    public void abort() {
      if (doc != null) {
        doc.abort();
        doc = null;
      }
    }
  
    // Called only by assert
    final boolean clearLastVectorFieldName() {
      lastVectorFieldName = null;
      return true;
    }
  
    // Called only by assert
    String lastVectorFieldName;
    final boolean vectorFieldsInOrder(FieldInfo fi) {
      try {
        if (lastVectorFieldName != null)
          return lastVectorFieldName.compareTo(fi.name) < 0;
        else
          return true;
      } finally {
        lastVectorFieldName = fi.name;
      }
    }
  }
  