home | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Lucene example source code file (FieldSortedTermVectorMapper.java)

This example Lucene source code file (FieldSortedTermVectorMapper.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

comparator, comparator, fieldsortedtermvectormapper, fieldsortedtermvectormapper, hashmap, map, map, override, string, termvectorentry, termvectorentry, termvectormapper, termvectoroffsetinfo, treeset, util

The Lucene FieldSortedTermVectorMapper.java source code

package org.apache.lucene.index;

import java.util.*;

/**
 * Copyright 2007 The Apache Software Foundation
 * <p/>
 * Licensed 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
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * 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.
 */

/**
 * For each Field, store a sorted collection of {@link TermVectorEntry}s
 * <p/>
 * This is not thread-safe.
 */
public class FieldSortedTermVectorMapper extends TermVectorMapper{
  private Map<String,SortedSet fieldToTerms = new HashMap>();
  private SortedSet<TermVectorEntry> currentSet;
  private String currentField;
  private Comparator<TermVectorEntry> comparator;

  /**
   *
   * @param comparator A Comparator for sorting {@link TermVectorEntry}s
   */
  public FieldSortedTermVectorMapper(Comparator<TermVectorEntry> comparator) {
    this(false, false, comparator);
  }


  public FieldSortedTermVectorMapper(boolean ignoringPositions, boolean ignoringOffsets, Comparator<TermVectorEntry> comparator) {
    super(ignoringPositions, ignoringOffsets);
    this.comparator = comparator;
  }

  @Override
  public void map(String term, int frequency, TermVectorOffsetInfo[] offsets, int[] positions) {
    TermVectorEntry entry = new TermVectorEntry(currentField, term, frequency, offsets, positions);
    currentSet.add(entry);
  }

  @Override
  public void setExpectations(String field, int numTerms, boolean storeOffsets, boolean storePositions) {
    currentSet = new TreeSet<TermVectorEntry>(comparator);
    currentField = field;
    fieldToTerms.put(field, currentSet);
  }

  /**
   * Get the mapping between fields and terms, sorted by the comparator
   *
   * @return A map between field names and {@link java.util.SortedSet}s per field.  SortedSet entries are {@link TermVectorEntry}
   */
  public Map<String,SortedSet getFieldToTerms() {
    return fieldToTerms;
  }


  public Comparator<TermVectorEntry> getComparator() {
    return comparator;
  }
}

Other Lucene examples (source code examples)

Here is a short list of links related to this Lucene FieldSortedTermVectorMapper.java source code file:



my book on functional programming

 

new blog posts

 

Copyright 1998-2019 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.