/*
* $Header: /export/home/cvsroot/MyPersonalizerRepository/MyPersonalizer/Subsystems/Kernel/Sources/es/udc/mypersonalizer/kernel/model/repository/sql/plain/ThreadAttachmentManager.java,v 1.1.1.1 2004/03/25 12:08:36 fbellas Exp $
* $Revision: 1.1.1.1 $
* $Date: 2004/03/25 12:08:36 $
*
* =============================================================================
*
* Copyright (c) 2003, The MyPersonalizer Development Group
* (http://www.tic.udc.es/~fbellas/mypersonalizer/index.html) at
* University Of A Coruna
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - 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.
*
* - Neither the name of the University Of A Coruna 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.
*
*/
package es.udc.mypersonalizer.kernel.model.repository.sql.plain;
import java.util.Map;
import java.util.HashMap;
import java.util.Collections;
/**
* This class contains the current thread attachments represented by an
* <code>Object</code>.
*
* @author Fernando Bellas
* @since 1.0
*/
public final class ThreadAttachmentManager {
/** Disallows creating instances of this class. */
private ThreadAttachmentManager() {
}
/** The thread attachments mapping. */
private static Map attachments =
Collections.synchronizedMap(new HashMap());
/**
* Gets the thread attachment if any.
*
* @return the thread attachment or <code>null</code> if there is no
* attachment.
*/
public static Object getAttachment() {
return attachments.get(Thread.currentThread());
}
/**
* Sets the thread attachment.
*
* @param attachment the thread attachment.
* @return the previous attachment or <code>null</code> if there is no
* previous attachment.
*/
public static Object setAttachment(Object attachment) {
return attachments.put(Thread.currentThread(), attachment);
}
/**
* Clears the thread attachment.
*/
public static void clearAttachment() {
attachments.remove(Thread.currentThread());
}
}
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