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/*
* Copyright (c) 2008 Israfil Consulting Services Corporation
* Copyright (c) 2008 Christian Edward Gruber
* All Rights Reserved
*
* This software is licensed under the Berkeley Standard Distribution license,
* (BSD license), as defined below:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of Israfil Consulting Services nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* $Id: Copyright.java 618 2008-04-14 14:03:03Z christianedwardgruber $
*/
package net.israfil.foundation.container;
/**
* A container for components that will satisfy requests if the
* component is available. How these component requests are satisfied
* are implementation dependent, as well as how inter-component
* dependencies are resolved.
*
* @author <a href="mailto:cgruber@israfil.net">Christian Edward Gruber </a>
*
*/
public interface Container {
/**
* Returns true if the Component is available and prepared.
* It throws a ContainerNotStarted runtime exception if the this method
* is used before the container is started.
*
* This method must be implemented by implementors of Container in a
* thread-safe and reentrant way.
*/
public boolean hasComponent(Object key);
/**
* Returns the component named by the key if it is available, or null if no
* such component is available. It throws a ContainerNotStarted runtime
* exception if this method is used before the container is started.
*
* This method must be implemented by implementors of Container in a
* thread-safe and reentrant way.
*/
public Object getComponent(Object key);
/**
* Begin the lifecycle of the container, after which components should be
* accessible. Implementors should stop any component registration as of
* the start() call. Subsequent start() calls should be ignored.
*/
public void start();
/**
* Returns true if the container has been started, and false if it has
* not been started.
*/
public boolean isRunning();
}
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