/*******************************************************************************
* Copyright (c) 1998, 2008 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.internal.sequencing;
import java.util.Iterator;
import org.eclipse.persistence.internal.sequencing.Sequencing;
import org.eclipse.persistence.internal.sessions.AbstractSession;
import org.eclipse.persistence.sessions.broker.SessionBroker;
class SessionBrokerSequencing implements Sequencing {
protected SessionBroker broker;
protected int whenShouldAcquireValueForAll;
public static boolean atLeastOneSessionHasSequencing(SessionBroker br) {
boolean hasSequencing = false;
Iterator sessionEnum = br.getSessionsByName().values().iterator();
while (sessionEnum.hasNext() && !hasSequencing) {
AbstractSession session = (AbstractSession)sessionEnum.next();
hasSequencing = session.getSequencing() != null;
}
return hasSequencing;
}
public SessionBrokerSequencing(SessionBroker broker) {
this.broker = broker;
initialize();
}
protected void initialize() {
whenShouldAcquireValueForAll = UNDEFINED;
boolean first = true;
Iterator sessionEnum = broker.getSessionsByName().values().iterator();
while ((first || (whenShouldAcquireValueForAll != UNDEFINED)) && sessionEnum.hasNext()) {
AbstractSession session = (AbstractSession)sessionEnum.next();
Sequencing sequencing = session.getSequencing();
if (sequencing != null) {
if (first) {
whenShouldAcquireValueForAll = sequencing.whenShouldAcquireValueForAll();
first = false;
} else {
if (whenShouldAcquireValueForAll != sequencing.whenShouldAcquireValueForAll()) {
whenShouldAcquireValueForAll = UNDEFINED;
}
}
}
}
}
// internal
protected Sequencing get(Class cls) {
return broker.getSessionForClass(cls).getSequencing();
}
public int whenShouldAcquireValueForAll() {
return whenShouldAcquireValueForAll;
}
public Object getNextValue(Class cls) {
return get(cls).getNextValue(cls);
}
}