Examples of org.hibernate.type.Type

org.hibernate.type.Type
Defines a mapping between a Java type and one or more JDBC {@linkplain java.sql.Types types}, as well as describing the in-memory semantics of the given java type (how do we check it for 'dirtiness', how do we copy values, etc).
Application developers needing custom types can implement this interface (either directly or via subclassing an existing impl) or by the (slightly more stable, though more limited) {@link org.hibernate.usertype.UserType}interface.
Implementations of this interface must certainly be thread-safe. It is recommended that they be immutable as well, though that is difficult to achieve completely given the no-arg constructor requirement for custom types. @author Gavin King @author Steve Ebersole

  }


  public void end(QueryTranslatorImpl q) throws QueryException {
    ignoreInitialJoin = false;


    Type propertyType = getPropertyType();
    if ( propertyType != null && propertyType.isCollectionType() ) {
      collectionRole = ( ( CollectionType ) propertyType ).getRole();
      collectionName = q.createNameForCollection( collectionRole );
      prepareForIndex( q );
    }
    else {

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      return currentName;
    }
  }


  public String addFromCollection(QueryTranslatorImpl q) throws QueryException {
    Type collectionElementType = getPropertyType();


    if ( collectionElementType == null ) {
      throw new QueryException( "must specify 'elements' for collection valued property in from clause: " + path );
    }


    if ( collectionElementType.isEntityType() ) {
      // an association
      QueryableCollection collectionPersister = q.getCollectionPersister( collectionRole );
      Queryable entityPersister = ( Queryable ) collectionPersister.getElementPersister();
      String clazz = entityPersister.getEntityName();

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      node.setType( SqlTokenTypes.NUM_FLOAT );
    }
    else {
      node.setType( SqlTokenTypes.CONSTANT );
    }
    Type type;
    try {
      type = TypeFactory.heuristicType( value.getClass().getName() );
    }
    catch ( MappingException me ) {
      throw new QueryException( me );

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  public void resolveInFunctionCall(boolean generateJoin, boolean implicitJoin) throws SemanticException {
    if ( isResolved() ) {
      return;
    }
    Type propertyType = prepareLhs();      // Prepare the left hand side and get the data type.
    if ( propertyType!=null && propertyType.isCollectionType() ) {
      resolveIndex(null);
    }
    else {
      resolveFirstChild();
      super.resolve(generateJoin, implicitJoin);

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  public void resolveIndex(AST parent) throws SemanticException {
    if ( isResolved() ) {
      return;
    }
    Type propertyType = prepareLhs();      // Prepare the left hand side and get the data type.
    dereferenceCollection( ( CollectionType ) propertyType, true, true, null, parent );
  }

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  throws SemanticException {
    // If this dot has already been resolved, stop now.
    if ( isResolved() ) {
      return;
    }
    Type propertyType = prepareLhs(); // Prepare the left hand side and get the data type.


    // If there is no data type for this node, and we're at the end of the path (top most dot node), then
    // this might be a Java constant.
    if ( propertyType == null ) {
      if ( parent == null ) {
        getWalker().getLiteralProcessor().lookupConstant( this );
      }
      // If the propertyType is null and there isn't a parent, just
      // stop now... there was a problem resolving the node anyway.
      return;
    }


    if ( propertyType.isComponentType() ) {
      // The property is a component...
      checkLhsIsNotCollection();
      dereferenceComponent( parent );
      initText();
    }
    else if ( propertyType.isEntityType() ) {
      // The property is another class..
      checkLhsIsNotCollection();
      dereferenceEntity( ( EntityType ) propertyType, implicitJoin, classAlias, generateJoin, parent );
      initText();
    }
    else if ( propertyType.isCollectionType() ) {
      // The property is a collection...
      checkLhsIsNotCollection();
      dereferenceCollection( ( CollectionType ) propertyType, implicitJoin, false, classAlias, parent );
    }
    else {

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      FromElement fromElement = getLhs().getFromElement();
      if ( fromElement == null ) {
        return null;
      }
      // If the lhs is a collection, use CollectionPropertyMapping
      Type propertyType = fromElement.getPropertyType( propertyName, propertyPath );
      if ( log.isDebugEnabled() ) {
        log.debug( "getDataType() : " + propertyPath + " -> " + propertyType );
      }
      super.setDataType( propertyType );
    }

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    if ( getWalker().isShallowQuery() || getWalker().getCurrentFromClause().isSubQuery() ) {
      resolve(false, true);
    }
    else {
      resolve(true, false);
      Type type = getDataType();
      if ( type.isEntityType() ) {
        FromElement fromElement = getFromElement();
        fromElement.setIncludeSubclasses( true ); // Tell the destination fromElement to 'includeSubclasses'.
        if ( useThetaStyleImplicitJoins ) {
          fromElement.getJoinSequence().setUseThetaStyle( true );  // Use theta style (for regression)
          // Move the node up, after the origin node.

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    // super-duper-classic-parser-regression-testing-mojo-magic...
    if ( explicitSubqueryFromElement && DotNode.useThetaStyleImplicitJoins ) {
      implied = true;
    }


    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 );

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  FromElement createElementJoin(QueryableCollection queryableCollection) throws SemanticException {
    FromElement elem;


    implied = true; //TODO: always true for now, but not if we later decide to support elements() in the from clause
    inElementsFunction = true;
    Type elementType = queryableCollection.getElementType();
    if ( !elementType.isEntityType() ) {
      throw new IllegalArgumentException( "Cannot create element join for a collection of non-entities!" );
    }
    this.queryableCollection = queryableCollection;
    SessionFactoryHelper sfh = fromClause.getSessionFactoryHelper();
    FromElement destination = null;

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