content: 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<TermVectorEntry>> fieldToTerms = new HashMap<String,SortedSet<TermVectorEntry>>();
    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<TermVectorEntry>> getFieldToTerms() {
      return fieldToTerms;
    }
  
  
    public Comparator<TermVectorEntry> getComparator() {
      return comparator;
    }
  }
  