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Lucene example source code file (TermsHashPerThread.java)

This example Lucene source code file (TermsHashPerThread.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

charblockpool, fieldinfo, intblockpool, inverteddocconsumerperfield, inverteddocconsumerperthread, io, ioexception, ioexception, override, override, termshash, termshash, termshashconsumerperthread, termshashperthread, termshashperthread

The Lucene TermsHashPerThread.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 java.io.IOException;

final class TermsHashPerThread extends InvertedDocConsumerPerThread {

  final TermsHash termsHash;
  final TermsHashConsumerPerThread consumer;
  final TermsHashPerThread nextPerThread;

  final CharBlockPool charPool;
  final IntBlockPool intPool;
  final ByteBlockPool bytePool;
  final boolean primary;
  final DocumentsWriter.DocState docState;

  public TermsHashPerThread(DocInverterPerThread docInverterPerThread, final TermsHash termsHash, final TermsHash nextTermsHash, final TermsHashPerThread primaryPerThread) {
    docState = docInverterPerThread.docState;

    this.termsHash = termsHash;
    this.consumer = termsHash.consumer.addThread(this);

    if (nextTermsHash != null) {
      // We are primary
      charPool = new CharBlockPool(termsHash.docWriter);
      primary = true;
    } else {
      charPool = primaryPerThread.charPool;
      primary = false;
    }

    intPool = new IntBlockPool(termsHash.docWriter);
    bytePool = new ByteBlockPool(termsHash.docWriter.byteBlockAllocator);

    if (nextTermsHash != null)
      nextPerThread = nextTermsHash.addThread(docInverterPerThread, this);
    else
      nextPerThread = null;
  }

  @Override
  InvertedDocConsumerPerField addField(DocInverterPerField docInverterPerField, final FieldInfo fieldInfo) {
    return new TermsHashPerField(docInverterPerField, this, nextPerThread, fieldInfo);
  }

  @Override
  synchronized public void abort() {
    reset(true);
    try {
      consumer.abort();
    } finally {
      if (nextPerThread != null) {
        nextPerThread.abort();
      }
    }
  }

  @Override
  public void startDocument() throws IOException {
    consumer.startDocument();
    if (nextPerThread != null)
      nextPerThread.consumer.startDocument();
  }

  @Override
  public DocumentsWriter.DocWriter finishDocument() throws IOException {
    final DocumentsWriter.DocWriter doc = consumer.finishDocument();

    final DocumentsWriter.DocWriter doc2;
    if (nextPerThread != null)
      doc2 = nextPerThread.consumer.finishDocument();
    else
      doc2 = null;
    if (doc == null)
      return doc2;
    else {
      doc.setNext(doc2);
      return doc;
    }
  }

  // Clear all state
  void reset(boolean recyclePostings) {
    intPool.reset();
    bytePool.reset();

    if (primary)
      charPool.reset();
  }
}

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