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//
// ========================================================================
// Copyright (c) 1995-2016 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.util.component;
import java.util.Collection;
public interface Container
{
/* ------------------------------------------------------------ */
/**
* Add a bean. If the bean is-a {@link Listener}, then also do an implicit {@link #addEventListener(Listener)}.
* @param o the bean object to add
* @return true if the bean was added, false if it was already present
*/
public boolean addBean(Object o);
/**
* @return the list of beans known to this aggregate
* @see #getBean(Class)
*/
public Collection<Object> getBeans();
/**
* @param clazz the class of the beans
* @return the list of beans of the given class (or subclass)
* @see #getBeans()
*/
public <T> Collection<T> getBeans(Class<T> clazz);
/**
* @param clazz the class of the bean
* @return the first bean of a specific class (or subclass), or null if no such bean exist
*/
public <T> T getBean(Class<T> clazz);
/**
* Removes the given bean.
* If the bean is-a {@link Listener}, then also do an implicit {@link #removeEventListener(Listener)}.
* @return whether the bean was removed
*/
public boolean removeBean(Object o);
/**
* Add an event listener.
* @see Container#addBean(Object)
* @param listener
*/
public void addEventListener(Listener listener);
/**
* Remove an event listener.
* @see Container#removeBean(Object)
* @param listener
*/
public void removeEventListener(Listener listener);
/**
* A listener for Container events.
* If an added bean implements this interface it will receive the events
* for this container.
*/
public interface Listener
{
void beanAdded(Container parent,Object child);
void beanRemoved(Container parent,Object child);
}
/**
* Inherited Listener.
* If an added bean implements this interface, then it will
* be added to all contained beans that are themselves Containers
*/
public interface InheritedListener extends Listener
{
}
}
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