Example usage for org.hibernate.mapping RootClass hasSubclasses

Introduction

In this page you can find the example usage for org.hibernate.mapping RootClass hasSubclasses.

Prototype

public boolean hasSubclasses() 

Source Link

Usage

From source file:org.grails.orm.hibernate.cfg.GrailsAnnotationConfiguration.java

License:Apache License

/**
 * Creates foreign keys for subclass tables that are mapped using table per subclass. Further information is
 * available in the <a href="http://jira.grails.org/browse/GRAILS-7729">JIRA ticket</a>
 *//*from   w ww.  ja v a 2 s.  co  m*/
private void createSubclassForeignKeys() {
    if (subclassForeignKeysCreated) {
        return;
    }

    for (PersistentClass persistentClass : classes.values()) {
        if (persistentClass instanceof RootClass) {
            RootClass rootClass = (RootClass) persistentClass;

            if (rootClass.hasSubclasses()) {
                Iterator subclasses = rootClass.getSubclassIterator();

                while (subclasses.hasNext()) {

                    Object subclass = subclasses.next();

                    // This test ensures that foreign keys will only be created for subclasses that are
                    // mapped using "table per subclass"
                    if (subclass instanceof JoinedSubclass) {
                        JoinedSubclass joinedSubclass = (JoinedSubclass) subclass;
                        joinedSubclass.createForeignKey();
                    }
                }
            }
        }
    }

    subclassForeignKeysCreated = true;
}

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