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//
// ========================================================================
// Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.websocket.api.extensions;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.ServiceLoader;
import java.util.Set;
public abstract class ExtensionFactory implements Iterable<Class<? extends Extension>>
{
private ServiceLoader<Extension> extensionLoader = ServiceLoader.load(Extension.class);
private Map<String, Class<? extends Extension>> availableExtensions;
public ExtensionFactory()
{
availableExtensions = new HashMap<>();
for (Extension ext : extensionLoader)
{
if (ext != null)
{
availableExtensions.put(ext.getName(),ext.getClass());
}
}
}
public Map<String, Class<? extends Extension>> getAvailableExtensions()
{
return availableExtensions;
}
public Class<? extends Extension> getExtension(String name)
{
return availableExtensions.get(name);
}
public Set<String> getExtensionNames()
{
return availableExtensions.keySet();
}
public boolean isAvailable(String name)
{
return availableExtensions.containsKey(name);
}
@Override
public Iterator<Class<? extends Extension>> iterator()
{
return availableExtensions.values().iterator();
}
public abstract Extension newInstance(ExtensionConfig config);
public void register(String name, Class<? extends Extension> extension)
{
availableExtensions.put(name,extension);
}
public void unregister(String name)
{
availableExtensions.remove(name);
}
}
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