content: package org.apache.lucene.search.vectorhighlight;
  
  /**
   * 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.util.ArrayList;
  import java.util.List;
  
  import org.apache.lucene.search.vectorhighlight.FieldPhraseList.WeightedPhraseInfo;
  import org.apache.lucene.search.vectorhighlight.FieldPhraseList.WeightedPhraseInfo.Toffs;
  
  /**
   * FieldFragList has a list of "frag info" that is used by FragmentsBuilder class
   * to create fragments (snippets).
   */
  public class FieldFragList {
  
    private List<WeightedFragInfo> fragInfos = new ArrayList<WeightedFragInfo>();
  
    /**
     * a constructor.
     * 
     * @param fragCharSize the length (number of chars) of a fragment
     */
    public FieldFragList( int fragCharSize ){
    }
  
    /**
     * convert the list of WeightedPhraseInfo to WeightedFragInfo, then add it to the fragInfos
     * 
     * @param startOffset start offset of the fragment
     * @param endOffset end offset of the fragment
     * @param phraseInfoList list of WeightedPhraseInfo objects
     */
    public void add( int startOffset, int endOffset, List<WeightedPhraseInfo> phraseInfoList ){
      fragInfos.add( new WeightedFragInfo( startOffset, endOffset, phraseInfoList ) );
    }
    
    /**
     * return the list of WeightedFragInfos.
     * 
     * @return fragInfos.
     */ 
    public List<WeightedFragInfo> getFragInfos() {
      return fragInfos;
    }
  
    public static class WeightedFragInfo {
  
      List<SubInfo> subInfos;
      float totalBoost;
      int startOffset;
      int endOffset;
  
      public WeightedFragInfo( int startOffset, int endOffset, List<WeightedPhraseInfo> phraseInfoList ){
        this.startOffset = startOffset;
        this.endOffset = endOffset;
        subInfos = new ArrayList<SubInfo>();
        for( WeightedPhraseInfo phraseInfo : phraseInfoList ){
          SubInfo subInfo = new SubInfo( phraseInfo.text, phraseInfo.termsOffsets, phraseInfo.seqnum );
          subInfos.add( subInfo );
          totalBoost += phraseInfo.boost;
        }
      }
      
      public List<SubInfo> getSubInfos(){
        return subInfos;
      }
      
      public float getTotalBoost(){
        return totalBoost;
      }
      
      public int getStartOffset(){
        return startOffset;
      }
      
      public int getEndOffset(){
        return endOffset;
      }
      
      @Override
      public String toString(){
        StringBuilder sb = new StringBuilder();
        sb.append( "subInfos=(" );
        for( SubInfo si : subInfos )
          sb.append( si.toString() );
        sb.append( ")/" ).append( totalBoost ).append( '(' ).append( startOffset ).append( ',' ).append( endOffset ).append( ')' );
        return sb.toString();
      }
      
      public static class SubInfo {
        final String text;  // unnecessary member, just exists for debugging purpose
        final List<Toffs> termsOffsets;   // usually termsOffsets.size() == 1,
                                // but if position-gap > 1 and slop > 0 then size() could be greater than 1
        int seqnum;
  
        SubInfo( String text, List<Toffs> termsOffsets, int seqnum ){
          this.text = text;
          this.termsOffsets = termsOffsets;
          this.seqnum = seqnum;
        }
        
        public List<Toffs> getTermsOffsets(){
          return termsOffsets;
        }
        
        public int getSeqnum(){
          return seqnum;
        }
        
        @Override
        public String toString(){
          StringBuilder sb = new StringBuilder();
          sb.append( text ).append( '(' );
          for( Toffs to : termsOffsets )
            sb.append( to.toString() );
          sb.append( ')' );
          return sb.toString();
        }
      }
    }
  }
  