110 lines
3.2 KiB
Java
110 lines
3.2 KiB
Java
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/* DeleteFileHelper.java -- Helper class to delete files on VM exit
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Copyright (C) 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.io;
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import java.security.AccessController;
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import java.security.PrivilegedAction;
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import java.util.ArrayList;
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import java.util.Iterator;
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/**
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* @author Guilhem Lavaux (guilhem@kaffe.org)
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* @author Jeroen Frijters (jeroen@sumatra.nl)
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* @author Michael Koch (konqueror@gmx.de)
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*/
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final class DeleteFileHelper extends Thread
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{
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private static ArrayList filesToDelete;
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static synchronized void add(File file)
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{
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if (filesToDelete == null)
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{
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filesToDelete = new ArrayList();
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AccessController.doPrivileged(new PrivilegedAction()
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{
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public Object run()
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{
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try
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{
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Runtime.getRuntime().addShutdownHook(new DeleteFileHelper());
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}
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catch (IllegalStateException e)
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{
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// Shutdown is already in progress, so we can't
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// register ours.
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}
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return null;
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}
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});
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}
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filesToDelete.add(file);
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}
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private static synchronized void deleteFiles()
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{
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Iterator it = filesToDelete.iterator();
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while (it.hasNext())
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{
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try
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{
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File file = (File) it.next();
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file.delete();
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}
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catch (Exception e)
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{
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// Do nothing here.
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}
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}
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}
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// Package-private to avoid a trampoline constructor.
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DeleteFileHelper()
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{
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}
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public void run()
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{
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deleteFiles();
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}
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}
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