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/*

This is not an official specification document, and usage is restricted.

NOTICE


(c) 2005-2007 Sun Microsystems, Inc. All Rights Reserved.

Neither this file nor any files generated from it describe a complete specification, and they may only be used as described below. For example, no permission is given for you to incorporate this file, in whole or in part, in an implementation of a Java specification.

Sun Microsystems Inc. owns the copyright in this file and it is provided to you for informative, as opposed to normative, use. The file and any files generated from it may be used to generate other informative documentation, such as a unified set of documents of API signatures for a platform that includes technologies expressed as Java APIs. The file may also be used to produce "compilation stubs," which allow applications to be compiled and validated for such platforms.

Any work generated from this file, such as unified javadocs or compiled stub files, must be accompanied by this notice in its entirety.

This work corresponds to the API signatures of JSR 219: Foundation Profile 1.1. In the event of a discrepency between this work and the JSR 219 specification, which is available at http://www.jcp.org/en/jsr/detail?id=219, the latter takes precedence. */ package java.lang.ref; /** * Reference queues, to which registered reference objects are appended by the * garbage collector after the appropriate reachability changes are detected. * * @version 1.17 10/31/00 * @author Mark Reinhold * @since 1.2 */ public class ReferenceQueue { /** * Constructs a new reference-object queue. */ public ReferenceQueue() { } /** * Polls this queue to see if a reference object is available. If one is * available without further delay then it is removed from the queue and * returned. Otherwise this method immediately returns null. * * @return A reference object, if one was immediately available, * otherwise null */ public Reference poll() { return null; } /** * Removes the next reference object in this queue, blocking until either * one becomes available or the given timeout period expires. * *

This method does not offer real-time guarantees: It schedules the * timeout as if by invoking the {@link Object#wait(long)} method. * * @param timeout If positive, block for up timeout * milliseconds while waiting for a reference to be * added to this queue. If zero, block indefinitely. * * @return A reference object, if one was available within the specified * timeout period, otherwise null * * @throws IllegalArgumentException * If the value of the timeout argument is negative * * @throws InterruptedException * If the timeout wait is interrupted */ public Reference remove(long timeout) throws IllegalArgumentException, InterruptedException { return null; } /** * Removes the next reference object in this queue, blocking until one * becomes available. * * @return A reference object, blocking until one becomes available * @throws InterruptedException If the wait is interrupted */ public Reference remove() throws InterruptedException { return null; } }





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