Example usage for org.hibernate.mapping RootClass getSubclassIterator

Introduction

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

Prototype

public Iterator getSubclassIterator() 

Source Link

Document

Iterate over subclasses in a special 'order', most derived subclasses first.

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>
 *//* w  w w. j  ava 2  s. c  o 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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