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Lucene example source code file (TermVectorsTermsWriterPerThread.java)

This example Lucene source code file (TermVectorsTermsWriterPerThread.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Lucene tags/keywords

byteslicereader, byteslicereader, fieldinfo, override, override, string, termshashconsumerperfield, termshashconsumerperthread, termshashperthread, termvectorstermswriter, termvectorstermswriter, termvectorstermswriterperfield, termvectorstermswriterperthread, termvectorstermswriterperthread

The Lucene TermVectorsTermsWriterPerThread.java source code

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;
    }
  }
}

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