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/*
* Copyright (c) 2010-2012, 2015 Eike Stepper (Loehne, Germany) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Martin Fluegge - initial API and implementation
*/
package org.eclipse.emf.cdo.dawn.editors.impl;
import org.eclipse.emf.cdo.dawn.editors.IDawnEditor;
import org.eclipse.emf.cdo.dawn.editors.IDawnEditorSupport;
import org.eclipse.emf.cdo.dawn.notifications.BasicDawnListener;
import org.eclipse.emf.cdo.transaction.CDOTransaction;
import org.eclipse.emf.cdo.transaction.CDOTransactionHandlerBase;
import org.eclipse.emf.cdo.view.CDOAdapterPolicy;
import org.eclipse.emf.cdo.view.CDOView;
import java.util.List;
/**
* @author Martin Fluegge
*/
public abstract class DawnAbstractEditorSupport implements IDawnEditorSupport
{
private final IDawnEditor editor;
private CDOView view;
private boolean dirty;
public CDOView getView()
{
return view;
}
public void setView(CDOView view)
{
this.view = view;
}
public DawnAbstractEditorSupport(IDawnEditor editor)
{
this.editor = editor;
}
public void setDirty(boolean dirty)
{
this.dirty = dirty;
}
public boolean isDirty()
{
return dirty;
}
public IDawnEditor getEditor()
{
return editor;
}
/**
* This method registeres the listeners for the DawnEditorSupport. Concrete implementaions can influence the
* registered listeneres by implementing the methods
* <ul>
* <li>getBasicHandler()</li>
* <li>getLockingHandler()</li>
* </ul>
* If one of these methods returns null the specific handler will not be registered and activated.
*
* @see #getBasicHandler()
* @see #getLockingHandler()
* @since 2.0
*/
public void registerListeners()
{
BasicDawnListener listener = getBasicHandler();
CDOView view = getView();
if (listener != null)
{
view.addListener(listener);
}
BasicDawnListener lockingHandler = getLockingHandler();
if (lockingHandler != null)
{
view.addListener(lockingHandler);
view.options().setLockNotificationEnabled(true);
}
if (view instanceof CDOTransaction)
{
CDOTransaction transaction = (CDOTransaction)view;
CDOTransactionHandlerBase transactionHandler = getTransactionHandler();
if (transactionHandler != null)
{
transaction.addTransactionHandler(transactionHandler);
}
transaction.options().addChangeSubscriptionPolicy(CDOAdapterPolicy.CDO);
transaction.options().setAutoReleaseLocksEnabled(false);
}
}
/**
* Subclasses must implement this method to deliver a IDawnListener that implements the behavior for Session
* invalidations. If the method returns null, the handler will not be registered.
*
* @since 2.0
*/
protected abstract BasicDawnListener getBasicHandler();
/**
* Subclasses must implement this method to deliver a IDawnListener that implements the behavior for remote locking
* notifications. If the method returns null, the handler will not be registered.
*
* @since 2.0
*/
protected abstract BasicDawnListener getLockingHandler();
/**
* Subclasses must implement this method to deliver a CDOTransactionHandlerBase that implements the behavior for
* remote changes notifications. If the method returns null, the handler will not be registered.
*
* @since 2.0
*/
protected abstract CDOTransactionHandlerBase getTransactionHandler();
/**
* @since 1.0
*/
public void rollback()
{
CDOView view = getEditor().getView();
if (view != null && view instanceof CDOTransaction)
{
((CDOTransaction)view).rollback();
}
}
/**
* @since 2.0
*/
public void lockObjects(List<Object> objectsToBeLocked)
{
for (Object objectToBeLocked : objectsToBeLocked)
{
lockObject(objectToBeLocked);
}
}
/**
* @since 2.0
*/
public void unlockObjects(List<Object> objectsToBeLocked)
{
for (Object objectToBeUnlocked : objectsToBeLocked)
{
unlockObject(objectToBeUnlocked);
}
}
}
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