package net.sf.okapi.steps.heuristicaligner;
   
   import java.util.ArrayList;
   import java.util.List;
   
   import net.sf.okapi.common.resource.ITextUnit;
   
   /**
    * Represents an aligned pair of source and target paragraphs.
   * Can be 1:1, 1:many, many:1, or many:many.
   * Note: Not used in the updated implementation.
   */
  public class ParagraphPair {
    public List<ITextUnit> sourceTUs = new ArrayList<>();
    public List<ITextUnit> targetTUs = new ArrayList<>();
    
    public ParagraphPair() {
    }
    
    public ParagraphPair(ITextUnit sourceTu, ITextUnit targetTu) {
      if (sourceTu != null) {
        sourceTUs.add(sourceTu);
      }
      if (targetTu != null) {
        targetTUs.add(targetTu);
      }
    }
    
    @Override
    public String toString() {
      return String.format("ParagraphPair[src=%d, trg=%d]", sourceTUs.size(), targetTUs.size());
    }
  }