CollectionBinder.java 文件源码

protected void bindOneToManySecondPass(
        Collection collection,
        Map persistentClasses,
        Ejb3JoinColumn[] fkJoinColumns,
        XClass collectionType,
        boolean cascadeDeleteEnabled,
        boolean ignoreNotFound,
        Mappings mappings,
        Map<XClass, InheritanceState> inheritanceStatePerClass) {

    final boolean debugEnabled = LOG.isDebugEnabled();
    if ( debugEnabled ) {
        LOG.debugf( "Binding a OneToMany: %s.%s through a foreign key", propertyHolder.getEntityName(), propertyName );
    }
    org.hibernate.mapping.OneToMany oneToMany = new org.hibernate.mapping.OneToMany( mappings, collection.getOwner() );
    collection.setElement( oneToMany );
    oneToMany.setReferencedEntityName( collectionType.getName() );
    oneToMany.setIgnoreNotFound( ignoreNotFound );

    String assocClass = oneToMany.getReferencedEntityName();
    PersistentClass associatedClass = (PersistentClass) persistentClasses.get( assocClass );
    if ( jpaOrderBy != null ) {
        final String orderByFragment = buildOrderByClauseFromHql(
                jpaOrderBy.value(),
                associatedClass,
                collection.getRole()
        );
        if ( StringHelper.isNotEmpty( orderByFragment ) ) {
            collection.setOrderBy( orderByFragment );
        }
    }

    if ( mappings == null ) {
        throw new AssertionFailure(
                "CollectionSecondPass for oneToMany should not be called with null mappings"
        );
    }
    Map<String, Join> joins = mappings.getJoins( assocClass );
    if ( associatedClass == null ) {
        throw new MappingException(
                "Association references unmapped class: " + assocClass
        );
    }
    oneToMany.setAssociatedClass( associatedClass );
    for (Ejb3JoinColumn column : fkJoinColumns) {
        column.setPersistentClass( associatedClass, joins, inheritanceStatePerClass );
        column.setJoins( joins );
        collection.setCollectionTable( column.getTable() );
    }
    if ( debugEnabled ) {
        LOG.debugf( "Mapping collection: %s -> %s", collection.getRole(), collection.getCollectionTable().getName() );
    }
    bindFilters( false );
    bindCollectionSecondPass( collection, null, fkJoinColumns, cascadeDeleteEnabled, property, mappings );
    if ( !collection.isInverse()
            && !collection.getKey().isNullable() ) {
        // for non-inverse one-to-many, with a not-null fk, add a backref!
        String entityName = oneToMany.getReferencedEntityName();
        PersistentClass referenced = mappings.getClass( entityName );
        Backref prop = new Backref();
        prop.setName( '_' + fkJoinColumns[0].getPropertyName() + '_' + fkJoinColumns[0].getLogicalColumnName() + "Backref" );
        prop.setUpdateable( false );
        prop.setSelectable( false );
        prop.setCollectionRole( collection.getRole() );
        prop.setEntityName( collection.getOwner().getEntityName() );
        prop.setValue( collection.getKey() );
        referenced.addProperty( prop );
    }
}