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Lucene example source code file (FormatPostingsTermsWriter.java)

This example Lucene source code file (FormatPostingsTermsWriter.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

closeable, fieldinfo, formatpostingsdocsconsumer, formatpostingsdocswriter, formatpostingsdocswriter, formatpostingsfieldswriter, formatpostingsfieldswriter, formatpostingstermsconsumer, formatpostingstermswriter, io, ioexception, ioexception, override, override, terminfoswriter

The Lucene FormatPostingsTermsWriter.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.Closeable;
import java.io.IOException;

final class FormatPostingsTermsWriter extends FormatPostingsTermsConsumer implements Closeable {

  final FormatPostingsFieldsWriter parent;
  final FormatPostingsDocsWriter docsWriter;
  final TermInfosWriter termsOut;
  FieldInfo fieldInfo;

  FormatPostingsTermsWriter(SegmentWriteState state, FormatPostingsFieldsWriter parent) throws IOException {
    this.parent = parent;
    termsOut = parent.termsOut;
    docsWriter = new FormatPostingsDocsWriter(state, this);
  }

  void setField(FieldInfo fieldInfo) {
    this.fieldInfo = fieldInfo;
    docsWriter.setField(fieldInfo);
  }

  char[] currentTerm;
  int currentTermStart;

  long freqStart;
  long proxStart;

  /** Adds a new term in this field */
  @Override
  FormatPostingsDocsConsumer addTerm(char[] text, int start) {
    currentTerm = text;
    currentTermStart = start;

    // TODO: this is abstraction violation -- ideally this
    // terms writer is not so "invasive", looking for file
    // pointers in its child consumers.
    freqStart = docsWriter.out.getFilePointer();
    if (docsWriter.posWriter.out != null)
      proxStart = docsWriter.posWriter.out.getFilePointer();

    parent.skipListWriter.resetSkip();

    return docsWriter;
  }

  /** Called when we are done adding terms to this field */
  @Override
  void finish() {
  }

  public void close() throws IOException {
    docsWriter.close();
  }
}

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