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/**
* Copyright (c) 2004 - 2011 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
* Victor Roldan Betancort - maintenance
*/
package org.eclipse.emf.internal.cdo.view;
import org.eclipse.emf.cdo.eresource.CDOResource;
import org.eclipse.emf.cdo.eresource.CDOResourceFolder;
import org.eclipse.emf.cdo.eresource.CDOResourceNode;
import org.eclipse.emf.cdo.transaction.CDOTransaction;
import org.eclipse.emf.cdo.util.CDOURIUtil;
import org.eclipse.net4j.util.io.IOUtil;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.resource.ContentHandler;
import org.eclipse.emf.ecore.resource.URIConverter;
import org.eclipse.emf.ecore.resource.URIHandler;
import org.eclipse.emf.spi.cdo.InternalCDOView;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
/**
* @author Eike Stepper
* @since 2.0
*/
public class CDOURIHandler implements URIHandler
{
private static final String CDO_URI_SCHEME = "cdo"; //$NON-NLS-1$
private InternalCDOView view;
public CDOURIHandler(InternalCDOView view)
{
this.view = view;
}
public InternalCDOView getView()
{
return view;
}
public boolean canHandle(URI uri)
{
return CDO_URI_SCHEME.equals(uri.scheme())
&& view.getSession().getRepositoryInfo().getUUID().equals(CDOURIUtil.extractRepositoryUUID(uri));
}
public boolean exists(URI uri, Map<?, ?> options)
{
return view.hasResource(CDOURIUtil.extractResourcePath(uri));
}
public void delete(URI uri, Map<?, ?> options) throws IOException
{
String path = CDOURIUtil.extractResourcePath(uri);
CDOTransaction transaction = null;
try
{
transaction = view.getSession().openTransaction();
CDOResourceNode node = transaction.getResourceNode(path);
node.delete(options);
transaction.commit();
}
catch (Exception ex)
{
IOException ioException = new IOException(ex.getMessage());
ioException.initCause(ex);
throw ioException;
}
finally
{
IOUtil.closeSilent(transaction);
}
}
public InputStream createInputStream(URI uri, Map<?, ?> options) throws IOException
{
throw new IOException("CDOURIHandler.createInputStream() not implemented"); //$NON-NLS-1$
}
public OutputStream createOutputStream(URI uri, Map<?, ?> options) throws IOException
{
throw new IOException("CDOURIHandler.createOutputStream() not implemented"); //$NON-NLS-1$
}
public Map<String, ?> contentDescription(URI uri, Map<?, ?> options) throws IOException
{
// ViK: I hardly find this useful for CDO. ContentHandler defines, for instance, VALIDITY_PROPERTY
// It might make sense in CDO... We could also introduce some CDO-Specific information here...
return ContentHandler.INVALID_CONTENT_DESCRIPTION;
}
@SuppressWarnings("unchecked")
public Map<String, ?> getAttributes(URI uri, Map<?, ?> options)
{
Map<String, Object> result = new HashMap<String, Object>();
String path = CDOURIUtil.extractResourcePath(uri);
CDOResourceNode node = view.getResourceNode(path);
if (node != null)
{
Set<String> requestedAttributes = (Set<String>)options.get(URIConverter.OPTION_REQUESTED_ATTRIBUTES);
if (requestedAttributes == null || requestedAttributes.contains(URIConverter.ATTRIBUTE_TIME_STAMP))
{
long stamp = node instanceof CDOResource ? ((CDOResource)node).getTimeStamp() : URIConverter.NULL_TIME_STAMP;
result.put(URIConverter.ATTRIBUTE_TIME_STAMP, stamp);
}
if (requestedAttributes == null || requestedAttributes.contains(URIConverter.ATTRIBUTE_DIRECTORY))
{
result.put(URIConverter.ATTRIBUTE_DIRECTORY, node instanceof CDOResourceFolder);
}
if (requestedAttributes == null || requestedAttributes.contains(URIConverter.ATTRIBUTE_READ_ONLY))
{
result.put(URIConverter.ATTRIBUTE_READ_ONLY, view.isReadOnly());
}
}
return result;
}
public void setAttributes(URI uri, Map<String, ?> attributes, Map<?, ?> options) throws IOException
{
// ViK: We can't change any of the proposed attributes. Only TIME_STAMP, and I believe we are not
// storing that attribute in the server. Due to CDOResouce distributed nature, changing it wouldn't make much sense.
}
}
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