code: public void addPathClass(String aPath, Class aClass)
      {
          List pathClasses = (List) m_pathClasses.get(aPath);
          if(pathClasses == null)
          {
              setPathClass(aPath, aClass);
          }
          else
          {
              pathClasses.add(aClass);
          }
      }
docs: Add a hint Class for a path. Used for relationships to extents.<br>
  SqlStatment will use these hint classes when resolving the path.
  Without these hints SqlStatment will use the base class the
  relationship points to ie: Article instead of CdArticle.
  
  @param aPath the path segment ie: allArticlesInGroup
  @param aClass the Class ie: CdArticle
  @see org.apache.ojb.broker.QueryTest#testInversePathExpression()