Examples of org.hibernate.engine.JoinSequence$Selector

org.hibernate.engine.JoinSequence
@author Gavin King

  }


  FromElement createCollectionElementsJoin(
          QueryableCollection queryableCollection,
          String collectionName) throws SemanticException {
    JoinSequence collectionJoinSequence = fromClause.getSessionFactoryHelper()
            .createCollectionJoinSequence( queryableCollection, collectionName );
    this.queryableCollection = queryableCollection;
    return createCollectionJoin( collectionJoinSequence, null );
  }

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    Type elementType = queryableCollection.getElementType();
    if ( elementType.isEntityType() ) {       // A collection of entities...
      elem = createEntityAssociation( role, roleAlias, joinType );
    }
    else if ( elementType.isComponentType() ) {    // A collection of components...
      JoinSequence joinSequence = createJoinSequence( roleAlias, joinType );
      elem = createCollectionJoin( joinSequence, roleAlias );
    }
    else {                      // A collection of scalar elements...
      JoinSequence joinSequence = createJoinSequence( roleAlias, joinType );
      elem = createCollectionJoin( joinSequence, roleAlias );
    }


    elem.setRole( role );
    elem.setQueryableCollection( queryableCollection );

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    String[] targetColumns = sfh.getCollectionElementColumns( role, roleAlias );
    AssociationType elementAssociationType = sfh.getElementAssociationType( type );


    // Create the join element under the from element.
    int joinType = JoinFragment.INNER_JOIN;
    JoinSequence joinSequence = sfh.createJoinSequence( implied, elementAssociationType, tableAlias, joinType, targetColumns );
    elem = initializeJoin( path, destination, joinSequence, targetColumns, origin, false );
    elem.setUseFromFragment( true );  // The associated entity is implied, but it must be included in the FROM.
    elem.setCollectionTableAlias( roleAlias );  // The collection alias is the role.
    return elem;
  }

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    // Get the class name of the associated entity.
    if ( queryableCollection.isOneToMany() ) {
      if ( log.isDebugEnabled() ) {
        log.debug( "createEntityAssociation() : One to many - path = " + path + " role = " + role + " associatedEntityName = " + associatedEntityName );
      }
      JoinSequence joinSequence = createJoinSequence( roleAlias, joinType );


      elem = createJoin( associatedEntityName, roleAlias, joinSequence, ( EntityType ) queryableCollection.getElementType(), false );
    }
    else {
      if ( log.isDebugEnabled() ) {

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          int joinType) throws SemanticException {
    FromElement elem;
    SessionFactoryHelper sfh = fromClause.getSessionFactoryHelper();
    if ( inElementsFunction /*implied*/ ) {
      // For implied many-to-many, just add the end join.
      JoinSequence joinSequence = createJoinSequence( roleAlias, joinType );
      elem = createJoin( associatedEntityName, roleAlias, joinSequence, type, true );
    }
    else {
      // For an explicit many-to-many relationship, add a second join from the intermediate 
      // (many-to-many) table to the destination table.  Also, make sure that the from element's 
      // idea of the destination is the destination table.
      String tableAlias = fromClause.getAliasGenerator().createName( entityPersister.getEntityName() );
      String[] secondJoinColumns = sfh.getCollectionElementColumns( role, roleAlias );
      // Add the second join, the one that ends in the destination table.
      JoinSequence joinSequence = createJoinSequence( roleAlias, joinType );
      joinSequence.addJoin( sfh.getElementAssociationType( collectionType ), tableAlias, joinType, secondJoinColumns );
      elem = createJoin( associatedEntityName, tableAlias, joinSequence, type, false );
      elem.setUseFromFragment( true );
    }
    return elem;
  }

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    // Iterate through the alias,JoinSequence pairs and generate SQL token nodes.
    Iterator iter = fromElements.iterator();
    while ( iter.hasNext() ) {
      final FromElement fromElement = ( FromElement ) iter.next();
      JoinSequence join = fromElement.getJoinSequence();
      join.setSelector(
          new JoinSequence.Selector() {
            public boolean includeSubclasses(String alias) {
              // The uber-rule here is that we need to include  subclass joins if
              // the FromElement is in any way dereferenced by a property from
              // the subclass table; otherwise we end up with column references

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   * Generate an empty join sequence instance.
   *
   * @return The generate join sequence.
   */
  public JoinSequence createJoinSequence() {
    return new JoinSequence( sfi );
  }

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   * @param joinType The type of join to render (inner, outer, etc);  see {@link org.hibernate.sql.JoinFragment}
   * @param columns The columns making up the condition of the join.
   * @return The generated join sequence.
   */
  public JoinSequence createJoinSequence(boolean implicit, AssociationType associationType, String tableAlias, int joinType, String[] columns) {
    JoinSequence joinSequence = createJoinSequence();
    joinSequence.setUseThetaStyle( implicit );  // Implicit joins use theta style (WHERE pk = fk), explicit joins use JOIN (after from)
    joinSequence.addJoin( associationType, tableAlias, joinType, columns );
    return joinSequence;
  }

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   * @param collPersister The persister for the collection at which the join should be rooted.
   * @param collectionName The alias to use for qualifying column references.
   * @return The generated join sequence.
   */
  public JoinSequence createCollectionJoinSequence(QueryableCollection collPersister, String collectionName) {
    JoinSequence joinSequence = createJoinSequence();
    joinSequence.setRoot( collPersister, collectionName );
    joinSequence.setUseThetaStyle( true );    // TODO: figure out how this should be set.
///////////////////////////////////////////////////////////////////////////////
// This was the reason for failures regarding INDEX_OP and subclass joins on
// theta-join dialects; not sure what behavior we were trying to emulate ;)
//    joinSequence = joinSequence.getFromPart();  // Emulate the old addFromOnly behavior.
    return joinSequence;

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    addJoin( name, joinSequence );
  }


  void addFromClass(String name, Queryable classPersister)
      throws QueryException {
    JoinSequence joinSequence = new JoinSequence( getFactory() )
        .setRoot( classPersister, name );
    //crossJoins.add(name);
    addFrom( name, classPersister.getEntityName(), joinSequence );
  }

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