jdk/src/share/classes/com/sun/imageio/stream/CloseableDisposerRecord.java

/*
 * Copyright 2005 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

package com.sun.imageio.stream;

import java.io.Closeable;
import java.io.IOException;
import sun.java2d.DisposerRecord;

/**
 * Convenience class that closes a given resource (e.g. RandomAccessFile),
 * typically associated with an Image{Input,Output}Stream, prior to the
 * stream being garbage collected.
 */
public class CloseableDisposerRecord implements DisposerRecord {
    private Closeable closeable;

    public CloseableDisposerRecord(Closeable closeable) {
        this.closeable = closeable;
    }

    public synchronized void dispose() {
        if (closeable != null) {
            try {
                closeable.close();
            } catch (IOException e) {
            } finally {
                closeable = null;
            }
        }
    }
}