/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* // Copyright (c) 1998, 2007, Oracle. All rights reserved.
*
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package oracle.toplink.essentials.tools.schemaframework;
import java.util.*;
import oracle.toplink.essentials.internal.sessions.AbstractSession;
import oracle.toplink.essentials.descriptors.ClassDescriptor;
/**
* <p>
* <b>Purpose</b>: This class is used to populate example data into the database, it allows for cirrcular references to be resolved.
* <p>
* <b>Responsibilities</b>:
* <ul>
* <li> Allow objects to be registered.
* <li> Allow objects to be looked up.
* <li> Store a globally accessable default instance.
*/
public class PopulationManager {
/** Store the objects registered. */
protected Hashtable registeredObjects;
/** Store the default instance. */
protected static PopulationManager defaultManager;
public PopulationManager() {
registeredObjects = new Hashtable();
}
/**
* Add all of the objects of the class and all of its subclasses.
* The session is needed because there is no other way to find all subclasses.
*/
public void addAllObjectsForAbstractClass(Class objectsClass, AbstractSession session, Vector allObjects) {
ClassDescriptor descriptor = session.getDescriptor(objectsClass);
addAllObjectsForClass(objectsClass, allObjects);
for (Enumeration enumeration = descriptor.getInheritancePolicy().getChildDescriptors().elements();
enumeration.hasMoreElements();) {
addAllObjectsForAbstractClass(((ClassDescriptor)enumeration.nextElement()).getJavaClass(), session, allObjects);
}
}
/**
* Add all of the objects of the class and all of its subclasses.
* The session is needed because there is no other way to find all subclasses.
*/
public void addAllObjectsForAbstractClass(Class objectsClass, oracle.toplink.essentials.sessions.Session session, Vector allObjects) {
addAllObjectsForAbstractClass(objectsClass, (AbstractSession)session, allObjects);
}
/**
* Add all of the objects of the class.
*/
public void addAllObjectsForClass(Class objectsClass, Vector allObjects) {
if (!getRegisteredObjects().containsKey(objectsClass)) {
return;
}
for (Enumeration enumeration = ((Hashtable)getRegisteredObjects().get(objectsClass)).elements();
enumeration.hasMoreElements();) {
allObjects.addElement(enumeration.nextElement());
}
}
/**
* Check if the object is registred given its name.
*/
public boolean containsObject(Class objectsClass, String objectsName) {
return ((getRegisteredObjects().containsKey(objectsClass)) && (((Hashtable)getRegisteredObjects().get(objectsClass)).containsKey(objectsName)));
}
/**
* Check if the object is registred given its name.
*/
public boolean containsObject(Object objectToCheck, String objectsName) {
return containsObject(objectToCheck.getClass(), objectsName);
}
/**
* Return all of the objects registered.
*/
public Vector getAllClasses() {
Vector allClasses = new Vector();
for (Enumeration e = getRegisteredObjects().keys(); e.hasMoreElements();) {
allClasses.addElement(e.nextElement());
}
return allClasses;
}
/**
* Return all of the objects registered.
*/
public Vector getAllObjects() {
Vector allObjects;
allObjects = new Vector();
for (Enumeration e = getAllClasses().elements(); e.hasMoreElements();) {
Class eachClass = (Class)e.nextElement();
addAllObjectsForClass(eachClass, allObjects);
}
return allObjects;
}
/**
* Return all of the objects of the class and all of its subclasses.
*/
public Vector getAllObjectsForAbstractClass(Class objectsClass) {
Vector allObjects;
allObjects = new Vector();
// hummm, how can this be done....
return allObjects;
}
/**
* Return all of the objects of the class and all of its subclasses.
* The session is needed because there is no other way to find all subclasses.
*/
public Vector getAllObjectsForAbstractClass(Class objectsClass, AbstractSession session) {
ClassDescriptor descriptor = session.getDescriptor(objectsClass);
Vector allObjects = new Vector();
addAllObjectsForClass(objectsClass, allObjects);
if (descriptor.hasInheritance()) {
for (Enumeration enumeration = descriptor.getInheritancePolicy().getChildDescriptors().elements();
enumeration.hasMoreElements();) {
addAllObjectsForClass(((ClassDescriptor)enumeration.nextElement()).getJavaClass(), allObjects);
}
}
return allObjects;
}
/**
* Return all of the objects of the class.
*/
public Vector getAllObjectsForClass(Class objectsClass) {
Vector allObjects;
allObjects = new Vector();
addAllObjectsForClass(objectsClass, allObjects);
return allObjects;
}
/**
* Lazy initialize the default instance.
*/
public static PopulationManager getDefaultManager() {
if (defaultManager == null) {
defaultManager = new PopulationManager();
}
return defaultManager;
}
/**
* Return the object registred given its name.
*/
public Object getObject(Class objectsClass, String objectsName) {
if (!(getRegisteredObjects().containsKey(objectsClass))) {
return null;
}
return ((Hashtable)getRegisteredObjects().get(objectsClass)).get(objectsName);
}
/**
* Return the registered objects.
*/
public Hashtable getRegisteredObjects() {
return registeredObjects;
}
/**
* Register the object given its name.
* The objects are represented as a hashtable of hashtables, lazy initialized on the class.
*/
public Object registerObject(Class javaClass, Object objectToRegister, String objectsName) {
if (!(getRegisteredObjects().containsKey(javaClass))) {
getRegisteredObjects().put(javaClass, new Hashtable());
}
((Hashtable)getRegisteredObjects().get(javaClass)).put(objectsName, objectToRegister);
return objectToRegister;
}
/**
* Register the object given its name.
* The objects are represented as a hashtable of hashtables, lazy initialized on the class.
*/
public Object registerObject(Object objectToRegister, String objectsName) {
if (!(getRegisteredObjects().containsKey(objectToRegister.getClass()))) {
getRegisteredObjects().put(objectToRegister.getClass(), new Hashtable());
}
((Hashtable)getRegisteredObjects().get(objectToRegister.getClass())).put(objectsName, objectToRegister);
return objectToRegister;
}
/**
* Remove the object given its class and name.
*/
public void removeObject(Class classToRemove, String objectsName) {
if (getRegisteredObjects().containsKey(classToRemove)) {
((Hashtable)getRegisteredObjects().get(classToRemove)).remove(objectsName);
}
}
/**
* Remove the object given its name.
*/
public Object removeObject(Object objectToRemove, String objectsName) {
removeObject(objectToRemove.getClass(), objectsName);
return objectToRemove;
}
/**
* Reset the default instance.
*/
public static void resetDefaultManager() {
defaultManager = null;
}
/**
* Set the default instance.
*/
public static void setDefaultManager(PopulationManager theDefaultManager) {
defaultManager = theDefaultManager;
}
/**
* Set the registered objects.
*/
public void setRegisteredObjects(Hashtable registeredObjects) {
this.registeredObjects = registeredObjects;
}
}
|
