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/*
* Copyright (c) 2010-2013 Eike Stepper (Berlin, 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:
* Eike Stepper - initial API and implementation
* Simon McDuff - bug 246705
*/
package org.eclipse.emf.spi.cdo;
import org.eclipse.emf.cdo.CDOObject;
import org.eclipse.emf.cdo.CDOState;
import org.eclipse.emf.cdo.view.CDOView;
import org.eclipse.emf.internal.cdo.CDOObjectImpl;
import org.eclipse.emf.internal.cdo.messages.Messages;
import org.eclipse.emf.internal.cdo.object.CDOLegacyAdapter;
import org.eclipse.emf.common.notify.Adapter;
import org.eclipse.emf.common.util.EList;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.InternalEObject;
import org.eclipse.emf.ecore.util.EcoreUtil;
import java.util.Collection;
import java.util.Iterator;
/**
* If the meaning of this type isn't clear, there really should be more of a description here...
*
* @author Eike Stepper
* @since 4.0
*/
public final class FSMUtil
{
private FSMUtil()
{
}
public static boolean isTransient(CDOObject object)
{
CDOState state = object.cdoState();
return state == CDOState.TRANSIENT || state == CDOState.PREPARED;
}
public static boolean isInvalid(CDOObject object)
{
CDOState state = object.cdoState();
return state == CDOState.INVALID || state == CDOState.INVALID_CONFLICT;
}
public static boolean isConflict(CDOObject object)
{
CDOState state = object.cdoState();
return state == CDOState.CONFLICT || state == CDOState.INVALID_CONFLICT;
}
public static boolean isNew(CDOObject object)
{
CDOState state = object.cdoState();
return state == CDOState.NEW;
}
/**
* @since 4.1
*/
public static boolean isClean(CDOObject object)
{
CDOState state = object.cdoState();
return state == CDOState.CLEAN;
}
public static boolean isNative(EObject eObject)
{
return eObject instanceof CDOObjectImpl;
}
public static InternalCDOObject adapt(Object object, CDOView view)
{
if (view.isClosed())
{
throw new IllegalStateException(Messages.getString("FSMUtil.0")); //$NON-NLS-1$
}
if (object instanceof InternalCDOObject)
{
return (InternalCDOObject)object;
}
if (object == null)
{
throw new IllegalArgumentException(Messages.getString("FSMUtil.1")); //$NON-NLS-1$
}
if (object instanceof InternalEObject)
{
return adaptLegacy((InternalEObject)object);
}
return null;
}
/*
* IMPORTANT: Compile errors in this method might indicate an old version of EMF. Legacy support is only enabled for
* EMF with fixed bug #247130. These compile errors do not affect native models!
*/
public static InternalCDOObject adaptLegacy(InternalEObject object)
{
EList<Adapter> adapters = object.eAdapters();
CDOLegacyAdapter adapter = getLegacyAdapter(adapters);
if (adapter == null)
{
adapter = new CDOLegacyAdapter(object);
}
return adapter;
// EList<InternalEObject.EReadListener> readListeners = object.eReadListeners();
// CDOLegacyWrapper wrapper = getLegacyWrapper(readListeners);
// if (wrapper == null)
// {
// wrapper = new CDOLegacyWrapper(object);
// // TODO Only Load/Attach transitions should actually *add* the wrappers!
// readListeners.add(0, wrapper);
// object.eWriteListeners().add(0, wrapper);
// }
//
// return wrapper;
}
private static CDOLegacyAdapter getLegacyAdapter(EList<Adapter> adapters)
{
return (CDOLegacyAdapter)EcoreUtil.getAdapter(adapters, CDOLegacyAdapter.class);
}
public static Iterator<InternalCDOObject> iterator(final Iterator<?> delegate, final InternalCDOView view)
{
return new Iterator<InternalCDOObject>()
{
private Object next;
public boolean hasNext()
{
if (delegate.hasNext())
{
next = adapt(delegate.next(), view);
return true;
}
return false;
}
public InternalCDOObject next()
{
return (InternalCDOObject)next;
}
public void remove()
{
throw new UnsupportedOperationException();
}
};
}
public static Iterator<InternalCDOObject> iterator(Collection<?> instances, final InternalCDOView view)
{
return iterator(instances.iterator(), view);
}
}
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