/*
* 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.xml.exporting;
import org.apache.ws.commons.util.Base64;
import org.exoplatform.services.jcr.core.ExtendedPropertyType;
import org.exoplatform.services.jcr.dataflow.ItemDataConsumer;
import org.exoplatform.services.jcr.datamodel.ItemType;
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.Constants;
import org.exoplatform.services.jcr.impl.core.value.ValueFactoryImpl;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import javax.jcr.NamespaceException;
import javax.jcr.NamespaceRegistry;
import javax.jcr.PropertyType;
import javax.jcr.RepositoryException;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;
/**
* @author <a href="mailto:Sergey.Kabashnyuk@gmail.com">Sergey Kabashnyuk</a>
* @version $Id: SystemViewStreamExporter.java 14244 2008-05-14 11:44:54Z ksm $
*/
public class SystemViewStreamExporter extends StreamExporter
{
private static final int BUFFER_SIZE = 3 * 1024 * 3;
private static final List<String> exportedVersionHistories = new ArrayList<String>();
/**
* @param writer
* @param dataManager
* @throws RepositoryException
* @throws NamespaceException
*/
public SystemViewStreamExporter(XMLStreamWriter writer, ItemDataConsumer dataManager,
NamespaceRegistry namespaceRegistry, ValueFactoryImpl systemValueFactory, boolean skipBinary, boolean noRecurse)
throws NamespaceException, RepositoryException
{
this(writer, dataManager, namespaceRegistry, systemValueFactory, skipBinary, noRecurse, false);
}
public SystemViewStreamExporter(XMLStreamWriter writer, ItemDataConsumer dataManager,
NamespaceRegistry namespaceRegistry, ValueFactoryImpl systemValueFactory, boolean skipBinary, boolean noRecurse,
boolean exportChildVersionHistory) throws NamespaceException, RepositoryException
{
super(writer, dataManager, namespaceRegistry, systemValueFactory, skipBinary, noRecurse,
exportChildVersionHistory);
}
/*
* (non-Javadoc)
* @see
* org.exoplatform.services.jcr.dataflow.ItemDataTraversingVisitor#entering(org.exoplatform.services
* .jcr.datamodel.NodeData, int)
*/
@Override
protected void entering(NodeData node, int level) throws RepositoryException
{
try
{
writer.writeStartElement(Constants.NS_SV_PREFIX, Constants.SV_NODE, getSvNamespaceUri());
if (level == 0)
{
startPrefixMapping();
}
writer.writeAttribute(Constants.NS_SV_PREFIX, getSvNamespaceUri(), Constants.SV_NAME, getExportName(node,
false));
}
catch (XMLStreamException e)
{
throw new RepositoryException(e);
}
}
/*
* (non-Javadoc)
* @see
* org.exoplatform.services.jcr.dataflow.ItemDataTraversingVisitor#entering(org.exoplatform.services
* .jcr.datamodel.PropertyData, int)
*/
@Override
protected void entering(PropertyData property, int level) throws RepositoryException
{
try
{
writer.writeStartElement(Constants.NS_SV_PREFIX, Constants.SV_PROPERTY, getSvNamespaceUri());
writer.writeAttribute(Constants.NS_SV_PREFIX, getSvNamespaceUri(), Constants.SV_NAME, getExportName(property,
false));
writer.writeAttribute(Constants.NS_SV_PREFIX, getSvNamespaceUri(), Constants.SV_TYPE, ExtendedPropertyType
.nameFromValue(property.getType()));
List<ValueData> values = property.getValues();
for (ValueData valueData : values)
{
writer.writeStartElement(Constants.NS_SV_PREFIX, Constants.SV_VALUE, getSvNamespaceUri());
writeValueData(valueData, property.getType());
writer.writeEndElement();
}
}
catch (XMLStreamException e)
{
throw new RepositoryException("Can't export value to string: " + e.getMessage(), e);
}
catch (IllegalStateException e)
{
throw new RepositoryException("Can't export value to string: " + e.getMessage(), e);
}
catch (IOException e)
{
throw new RepositoryException("Can't export value to string: " + e.getMessage(), e);
}
}
/*
* (non-Javadoc)
* @see
* org.exoplatform.services.jcr.dataflow.ItemDataTraversingVisitor#leaving(org.exoplatform.services
* .jcr.datamodel.NodeData, int)
*/
@Override
protected void leaving(NodeData node, int level) throws RepositoryException
{
try
{
if (exportChildVersionHistory && node.getPrimaryTypeName().equals(Constants.NT_VERSIONEDCHILD))
{
try
{
PropertyData childVersionHistory =
((PropertyData)dataManager.getItemData(node, new QPathEntry(Constants.JCR_CHILDVERSIONHISTORY, 1),
ItemType.PROPERTY));
String childVersionHistoryId =
getValueAsStringForExport(childVersionHistory.getValues().get(0), childVersionHistory.getType());
//check does this child version history was already exported
if (!exportedVersionHistories.contains(childVersionHistoryId))
{
writer.writeStartElement(Constants.NS_SV_PREFIX, Constants.SV_VERSION_HISTORY, getSvNamespaceUri());
writer.writeAttribute(Constants.NS_SV_PREFIX, getSvNamespaceUri(), Constants.SV_NAME,
childVersionHistoryId);
NodeData versionStorage = (NodeData)dataManager.getItemData(Constants.VERSIONSTORAGE_UUID);
NodeData childVersionNodeData =
(NodeData)dataManager.getItemData(versionStorage, new QPathEntry("", childVersionHistoryId, 1),
ItemType.NODE);
childVersionNodeData.accept(this);
writer.writeEndElement();
exportedVersionHistories.add(childVersionHistoryId);
}
}
catch (IOException e)
{
throw new RepositoryException("Can't export versioned child version history: " + e.getMessage(), e);
}
}
writer.writeEndElement();
}
catch (XMLStreamException e)
{
throw new RepositoryException(e);
}
}
/*
* (non-Javadoc)
* @see
* org.exoplatform.services.jcr.dataflow.ItemDataTraversingVisitor#leaving(org.exoplatform.services
* .jcr.datamodel.PropertyData, int)
*/
@Override
protected void leaving(PropertyData property, int level) throws RepositoryException
{
try
{
writer.writeEndElement();
}
catch (XMLStreamException e)
{
throw new RepositoryException(e);
}
}
protected void writeValueData(ValueData data, int type) throws RepositoryException, IllegalStateException,
XMLStreamException, IOException
{
if (PropertyType.BINARY == type)
{
if (!isSkipBinary())
{
InputStream is = data.getAsStream();
try
{
byte[] buffer = new byte[BUFFER_SIZE];
int len;
while ((len = is.read(buffer)) > 0)
{
char[] charbuf1 = Base64.encode(buffer, 0, len, 0, "").toCharArray();
writer.writeCharacters(charbuf1, 0, charbuf1.length);
}
}
finally
{
if (is != null)
{
is.close();
}
}
}
}
else
{
String charValue = getValueAsStringForExport(data, type);
if (hasValidCharsOnly(charValue))
{
writer.writeCharacters(charValue.toCharArray(), 0, charValue.length());
}
else
{
byte[] content = charValue.getBytes(Constants.DEFAULT_ENCODING);
char[] charbuf = Base64.encode(content, 0, content.length, 0, "").toCharArray();
writer.writeAttribute(Constants.NS_XSI_URI, "type", "xsd:base64Binary");
writer.writeCharacters(charbuf, 0, charbuf.length);
}
}
}
}