X-Git-Url: https://oss.titaniummirror.com/gitweb/?a=blobdiff_plain;f=libjava%2Fjava%2Futil%2FObservable.java;fp=libjava%2Fjava%2Futil%2FObservable.java;h=0000000000000000000000000000000000000000;hb=6fed43773c9b0ce596dca5686f37ac3fc0fa11c0;hp=4760713f0203af71dabf893eee50ca5a92f04053;hpb=27b11d56b743098deb193d510b337ba22dc52e5c;p=msp430-gcc.git diff --git a/libjava/java/util/Observable.java b/libjava/java/util/Observable.java deleted file mode 100644 index 4760713f..00000000 --- a/libjava/java/util/Observable.java +++ /dev/null @@ -1,166 +0,0 @@ -/* java.util.Observable - Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc. - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath is distributed in the hope that it will be useful, but -WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA -02111-1307 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - - -package java.util; - -/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 - * "The Java Language Specification", ISBN 0-201-63451-1 - * plus online API docs for JDK 1.2 beta from http://www.javasoft.com. - * Status: Believed complete and correct. - */ - -/** - * @author Warren Levy - * @date September 2, 1998. - */ -public class Observable -{ - /** tracks whether this object has changed */ - private boolean changed; - - /* list of the Observers registered as interested in this Observable */ - private Vector observers; - - /* TBD: This might be better implemented as an Observer[] - * but that would mean writing more code rather than making use of - * the existing Vector class (this also implies a larger text code - * space in resulting executables). The tradeoff is one of speed - * (manipulating the Observer[] directly) vs. size/reuse. In the future, - * we may decide to make the tradeoff and reimplement with an Observer[]. - */ - - /** - * Constructs an Observable with zero Observers. - */ - public Observable() - { - changed = false; - observers = new Vector(); - } - - /** - * Adds an Observer. If the observer was already added this method does - * nothing. - * - * @param observer Observer to add. - */ - public synchronized void addObserver(Observer observer) - { - if (!observers.contains(observer)) - observers.addElement(observer); - } - - /** - * Reset this Observable's state to unchanged. - */ - protected synchronized void clearChanged() - { - changed = false; - } - - /** - * @return Number of Observers for this Observable. - */ - public synchronized int countObservers() - { - return observers.size(); - } - - /** - * Deletes an Observer of this Observable. - * - * @param victim Observer to delete. - */ - public synchronized void deleteObserver(Observer victim) - { - observers.removeElement(victim); - } - - /** - * Deletes all Observers of this Observable. - */ - public synchronized void deleteObservers() - { - observers.removeAllElements(); - } - - /** - * @return Whether or not this Observable has changed. - */ - public synchronized boolean hasChanged() - { - return changed; - } - - /** - * If the Observable has actually changed then tell all Observers about it, - * then resets state to unchanged. - */ - public void notifyObservers() - { - notifyObservers(null); - } - - /** - * If the Observable has actually changed then tell all Observers about it, - * then resets state to unchanged. - * Note that though the order of notification is unspecified in subclasses, - * in Observable it is in the order of registration. - * - * @param obj Arguement to Observer's update method. - */ - public void notifyObservers(Object obj) - { - if (!hasChanged()) - return; - Vector ob1 = (Vector) observers.clone(); - - for (int i = 0; i < ob1.size(); i++) - ((Observer) ob1.elementAt(i)).update(this, obj); - - clearChanged(); - } - - /** - * Marks this Observable as having changed. - */ - protected synchronized void setChanged() - { - changed = true; - } -}