/*
* See the NOTICE file distributed with this work for additional
* information regarding copyright ownership.
*
* 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.xwiki.filter.instance.output;
import java.io.IOException;
import java.util.Stack;
import javax.inject.Inject;
import javax.inject.Named;
import org.slf4j.Logger;
import org.xwiki.component.annotation.Component;
import org.xwiki.component.annotation.InstantiationStrategy;
import org.xwiki.component.descriptor.ComponentInstantiationStrategy;
import org.xwiki.extension.Extension;
import org.xwiki.extension.ExtensionId;
import org.xwiki.extension.LocalExtension;
import org.xwiki.extension.ResolveException;
import org.xwiki.extension.internal.ExtensionFactory;
import org.xwiki.extension.repository.ExtensionRepositoryManager;
import org.xwiki.extension.repository.InstalledExtensionRepository;
import org.xwiki.extension.repository.LocalExtensionRepository;
import org.xwiki.filter.FilterEventParameters;
import org.xwiki.filter.FilterException;
import org.xwiki.filter.event.extension.ExtensionFilter;
import org.xwiki.filter.event.model.WikiFilter;
import org.xwiki.filter.output.AbstractBeanOutputFilterStream;
import org.xwiki.model.EntityType;
import org.xwiki.model.ModelContext;
import org.xwiki.model.reference.EntityReference;
/**
* @version $Id: 83d48c87a16d143a8381bc8f1c86c0696ee5565a $
* @since 6.2M1
*/
@Component
@Named(ExtensionInstanceOutputFilterStreamFactory.ROLEHINT)
@InstantiationStrategy(ComponentInstantiationStrategy.PER_LOOKUP)
public class ExtensionInstanceOutputFilterStream
extends AbstractBeanOutputFilterStream<ExtensionInstanceOutputProperties> implements ExtensionFilter, WikiFilter
{
private static final String WIKINAMESPACE = "wiki:";
@Inject
private LocalExtensionRepository localRepository;
@Inject
private ExtensionRepositoryManager extensionRepository;
@Inject
private InstalledExtensionRepository installedRepository;
@Inject
private ModelContext modelContext;
@Inject
private ExtensionFactory factory;
@Inject
private Logger logger;
private Stack<String> currentNamespace = new Stack<>();
@Override
public void close() throws IOException
{
// Nothing to close
}
// Events
private String getCurrentNamespace()
{
if (!this.currentNamespace.isEmpty()) {
return this.currentNamespace.peek();
}
String namespace = null;
// TODO: This makes impossible to register an extension at root level through events, should find a cleaner way
EntityReference currentEntityReference = this.modelContext.getCurrentEntityReference();
if (currentEntityReference != null) {
namespace = WIKINAMESPACE + currentEntityReference.extractReference(EntityType.WIKI).getName();
}
return namespace;
}
@Override
public void beginWiki(String name, FilterEventParameters parameters) throws FilterException
{
this.currentNamespace.push(WIKINAMESPACE + name);
}
@Override
public void endWiki(String name, FilterEventParameters parameters) throws FilterException
{
this.currentNamespace.pop();
}
@Override
public void beginNamespace(String name, FilterEventParameters parameters) throws FilterException
{
this.currentNamespace.push(name);
}
@Override
public void endNamespace(String name, FilterEventParameters parameters) throws FilterException
{
this.currentNamespace.pop();
}
@Override
public void beginExtension(String id, String version, FilterEventParameters parameters) throws FilterException
{
// TODO: add support for complete extension
}
@Override
public void endExtension(String id, String version, FilterEventParameters parameters) throws FilterException
{
// TODO: add support for complete extension
ExtensionId extensionId = new ExtensionId(id, factory.getVersion(version));
try {
LocalExtension localExtension = this.localRepository.getLocalExtension(extensionId);
if (localExtension == null) {
Extension extension;
try {
// Try to find and download the extension from a repository
extension = this.extensionRepository.resolve(extensionId);
} catch (ResolveException e) {
this.logger.debug("Can't find extension [{}]", extensionId, e);
// FIXME: Create a dummy extension. Need support for partial/lazy extension.
return;
}
localExtension = this.localRepository.storeExtension(extension);
}
String namespace = getCurrentNamespace();
// Make sure it's not already there
// TODO: should probably make it configurable
if (installedRepository.getInstalledExtension(localExtension.getId().getId(), namespace) == null) {
for (ExtensionId feature : localExtension.getExtensionFeatures()) {
if (installedRepository.getInstalledExtension(feature.getId(), namespace) != null) {
// Already exist so don't register it or it could create a mess
return;
}
}
} else {
return;
}
// Register the extension as installed
installedRepository.installExtension(localExtension, namespace, false);
} catch (Exception e) {
this.logger.error("Failed to register extenion [{}] from the XAR", extensionId, e);
}
}
}