/*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is the Kowari Metadata Store.
*
* The Initial Developer of the Original Code is Plugged In Software Pty
* Ltd (http://www.pisoftware.com, mailto:info@pisoftware.com). Portions
* created by Plugged In Software Pty Ltd are Copyright (C) 2001,2002
* Plugged In Software Pty Ltd. All Rights Reserved.
*
* Contributor(s): N/A.
*
* [NOTE: The text of this Exhibit A may differ slightly from the text
* of the notices in the Source Code files of the Original Code. You
* should use the text of this Exhibit A rather than the text found in the
* Original Code Source Code for Your Modifications.]
*
*/
package org.mulgara.resolver.http;
// Third party packages
import org.apache.log4j.Logger;
// Locally written packages
import org.mulgara.content.ContentHandlerManager;
import org.mulgara.resolver.spi.*;
/**
* Resolves constraints in models defined by HTTP URLs.
*
* @created 2004-09-23
*
* @author Mark Ludlow
*
* @version $Revision: 1.8 $
*
* @modified $Date: 2005/01/05 04:58:45 $ @maintenanceAuthor $Author: newmana $
*
* @company <a href="mailto:info@PIsoftware.com">Plugged In Software</a>
*
* @copyright © 2004 <a href="http://www.PIsoftware.com/">Plugged In
* Software Pty Ltd</a>
*
* @licence <a href="{@docRoot}/../../LICENCE">Mozilla Public License v1.1</a>
*/
public class HttpResolverFactory implements ResolverFactory {
/**
* Logger.
*/
@SuppressWarnings("unused")
private static final Logger logger = Logger.getLogger(HttpResolverFactory.class.getName());
private final ContentHandlerManager contentHandlers;
/**
* Instantiate a {@link HttpResolverFactory}.
*/
private HttpResolverFactory(ResolverFactoryInitializer resolverFactoryInitializer)
throws InitializerException {
// Validate "resolverFactoryInitializer" parameter
if (resolverFactoryInitializer == null) {
throw new IllegalArgumentException("Null \"resolverFactoryInitializer\" parameter");
}
// Obtain the content handler list
contentHandlers = resolverFactoryInitializer.getContentHandlers();
// Claim the http: protocol
resolverFactoryInitializer.addProtocol("http", this);
resolverFactoryInitializer.addProtocol("https", this);
// Indicate that content caching is required
resolverFactoryInitializer.cacheModelAccess(this);
}
/**
* {@inheritDoc ResolverFactory}
*
* This is actually a non-operation, because the only persistent resources
* are outside the database.
*/
public void close() {
// null implementation
}
/**
* {@inheritDoc ResolverFactory}
*
* This is actually a non-operation, because the only persistent resources
* are outside the database.
*/
public void delete() {
// null implementation
}
/**
* {@inheritDoc}
* @return <code>null</code> - no default graphs for this resolver
*/
public Graph[] getDefaultGraphs() { return null; }
/**
* {@inheritDoc}
* @return <code>true</code> - this graph supports exports.
*/
public boolean supportsExport() {
return true;
}
/**
* Register this resolver upon database startup.
*
* @param resolverFactoryInitializer the database within which to find or
* create the various XML Schema resources
* @throws InitializerException if the XML Schema resources
* can't be found or created
*/
public static ResolverFactory newInstance(ResolverFactoryInitializer resolverFactoryInitializer)
throws InitializerException {
return new HttpResolverFactory(resolverFactoryInitializer);
}
/**
* Obtain an http resolver.
*
* @param resolverSession the session which this query is local to
* @param canWrite {@inheritDoc}; ignored in this implementation
*
* @throws IllegalArgumentException if <var>resolverSession</var> is
* <code>null</code>
* @throws ResolverFactoryException {@inheritDoc}
*/
public Resolver newResolver(boolean canWrite, ResolverSession resolverSession,
Resolver systemResolver)
throws ResolverFactoryException {
return new HttpResolver(resolverSession, systemResolver, contentHandlers);
}
}