/*
* Copyright (C) 2009 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.services.jcr.impl.dataflow.session;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.LinkedList;
import java.util.List;
import javax.jcr.InvalidItemStateException;
import javax.jcr.RepositoryException;
import org.exoplatform.services.jcr.access.AccessControlList;
import org.exoplatform.services.jcr.dataflow.ChangesLogIterator;
import org.exoplatform.services.jcr.dataflow.CompositeChangesLog;
import org.exoplatform.services.jcr.dataflow.ItemState;
import org.exoplatform.services.jcr.dataflow.ItemStateChangesLog;
import org.exoplatform.services.jcr.dataflow.PlainChangesLog;
import org.exoplatform.services.jcr.dataflow.PlainChangesLogImpl;
import org.exoplatform.services.jcr.dataflow.TransactionChangesLog;
import org.exoplatform.services.jcr.datamodel.ItemData;
import org.exoplatform.services.jcr.datamodel.NodeData;
import org.exoplatform.services.jcr.datamodel.PropertyData;
import org.exoplatform.services.jcr.datamodel.QPathEntry;
import org.exoplatform.services.jcr.datamodel.ValueData;
import org.exoplatform.services.jcr.impl.core.value.ValueFactoryImpl;
import org.exoplatform.services.jcr.impl.dataflow.AbstractValueData;
import org.exoplatform.services.jcr.impl.dataflow.TransientItemData;
import org.exoplatform.services.jcr.impl.dataflow.TransientNodeData;
import org.exoplatform.services.jcr.impl.dataflow.TransientPropertyData;
import org.exoplatform.services.jcr.impl.dataflow.persistent.LocalWorkspaceDataManagerStub;
/**
* Created by The eXo Platform SAS.<br/> proxy of local workspace storage. "local" means that
* backended workspace data manager is located on the same JVM as session layer.
* WorkspaceStorageDataManagerProxy can be pluggable in a case of other storage-session transport
* applied (for ex RMI) this implementation is responsible for making copy of persisted (shared)
* data objects for session data manager and pass it on top (to TransactionableDM) (and vice versa?)
*
* @author Gennady Azarenkov
* @version $Id: LocalWorkspaceStorageDataManagerProxy.java 11907 2008-03-13 15:36:21Z ksm $
*/
public class LocalWorkspaceStorageDataManagerProxy
implements WorkspaceStorageDataManagerProxy
{
protected final LocalWorkspaceDataManagerStub storageDataManager;
protected final ValueFactoryImpl valueFactory;
public LocalWorkspaceStorageDataManagerProxy(LocalWorkspaceDataManagerStub storageDataManager,
ValueFactoryImpl valueFactory)
{
this.storageDataManager = storageDataManager;
this.valueFactory = valueFactory;
}
/**
* {@inheritDoc}
*/
public void save(ItemStateChangesLog changesLog) throws InvalidItemStateException, UnsupportedOperationException,
RepositoryException
{
ChangesLogIterator logIterator = ((CompositeChangesLog) changesLog).getLogIterator();
TransactionChangesLog newLog = new TransactionChangesLog();
while (logIterator.hasNextLog())
{
List<ItemState> states = new ArrayList<ItemState>(changesLog.getSize());
PlainChangesLog changes = logIterator.nextLog();
for (ItemState change : changes.getAllStates())
{
states.add(new ItemState(copyItemData(change.getData()), change.getState(), change.isEventFire(), change
.getAncestorToSave(), change.isInternallyCreated(), change.isPersisted()));
}
newLog.addLog(new PlainChangesLogImpl(states, changes.getSessionId(), changes.getEventType()));
}
storageDataManager.save(newLog);
}
public ItemData getItemData(NodeData parentData, QPathEntry name) throws RepositoryException
{
return copyItemData(storageDataManager.getItemData(parentData, name));
}
/**
* {@inheritDoc}
*/
public ItemData getItemData(String identifier) throws RepositoryException
{
return copyItemData(storageDataManager.getItemData(identifier));
}
/**
* {@inheritDoc}
*/
public List<NodeData> getChildNodesData(NodeData parent) throws RepositoryException
{
return copyNodes(storageDataManager.getChildNodesData(parent));
}
/**
* {@inheritDoc}
*/
public List<PropertyData> getChildPropertiesData(NodeData parent) throws RepositoryException
{
return copyProperties(storageDataManager.getChildPropertiesData(parent));
}
public List<PropertyData> listChildPropertiesData(NodeData parent) throws RepositoryException
{
return copyPropertiesWithoutValues(storageDataManager.listChildPropertiesData(parent));
}
/**
* {@inheritDoc}
*/
public List<PropertyData> getReferencesData(String identifier, boolean skipVersionStorage)
throws RepositoryException
{
return copyProperties(storageDataManager.getReferencesData(identifier, skipVersionStorage));
}
/**
* {@inheritDoc}
*/
public Calendar getCurrentTime()
{
return storageDataManager.getCurrentTime();
}
private TransientItemData copyItemData(final ItemData item) throws RepositoryException
{
if (item == null)
return null;
// make a copy
if (item.isNode())
{
final NodeData node = (NodeData) item;
// the node ACL can't be are null as ACL manager does care about this
final AccessControlList acl = node.getACL();
if (acl == null)
{
throw new RepositoryException("Node ACL is null. " + node.getQPath().getAsString() + " "
+ node.getIdentifier());
}
return new TransientNodeData(node.getQPath(), node.getIdentifier(), node.getPersistedVersion(), node
.getPrimaryTypeName(), node.getMixinTypeNames(), node.getOrderNumber(), node.getParentIdentifier(),
acl);
}
// else - property
final PropertyData prop = (PropertyData) item;
// make a copy
TransientPropertyData newData =
new TransientPropertyData(prop.getQPath(), prop.getIdentifier(), prop.getPersistedVersion(), prop
.getType(), prop.getParentIdentifier(), prop.isMultiValued());
List<ValueData> values = null;
// null is possible for deleting items
if (prop.getValues() != null)
{
values = new ArrayList<ValueData>();
for (ValueData val : prop.getValues())
{
values.add(((AbstractValueData) val).createTransientCopy());
}
}
newData.setValues(values);
return newData;
}
private TransientItemData copyPropertyDataWithoutValue(PropertyData property) throws RepositoryException
{
if (property == null)
return null;
// make a copy
TransientPropertyData newData =
new TransientPropertyData(property.getQPath(), property.getIdentifier(), property.getPersistedVersion(),
property.getType(), property.getParentIdentifier(), property.isMultiValued());
newData.setValues(new ArrayList<ValueData>());
return newData;
}
private List<NodeData> copyNodes(final List<NodeData> childNodes) throws RepositoryException
{
final List<NodeData> copyOfChildsNodes = new LinkedList<NodeData>();
synchronized (childNodes)
{
for (NodeData nodeData : childNodes)
{
copyOfChildsNodes.add((NodeData) copyItemData(nodeData));
}
}
return copyOfChildsNodes;
}
private List<PropertyData> copyProperties(final List<PropertyData> traverseProperties) throws RepositoryException
{
final List<PropertyData> copyOfChildsProperties = new LinkedList<PropertyData>();
synchronized (traverseProperties)
{
for (PropertyData nodeProperty : traverseProperties)
{
copyOfChildsProperties.add((PropertyData) copyItemData(nodeProperty));
}
}
return copyOfChildsProperties;
}
private List<PropertyData> copyPropertiesWithoutValues(final List<PropertyData> traverseProperties)
throws RepositoryException
{
final List<PropertyData> copyOfChildsProperties = new LinkedList<PropertyData>();
synchronized (traverseProperties)
{
for (PropertyData nodeProperty : traverseProperties)
{
copyOfChildsProperties.add((PropertyData) copyPropertyDataWithoutValue(nodeProperty));
}
}
return copyOfChildsProperties;
}
}