75 lines
2.4 KiB
Java
75 lines
2.4 KiB
Java
/*
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* Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.management;
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import java.io.File;
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import java.io.IOException;
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/*
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* Utility class to support file system operations
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*
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* @since 1.5
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*/
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public abstract class FileSystem {
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private static final Object lock = new Object();
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private static FileSystem fs;
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protected FileSystem() { }
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/**
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* Opens the file system
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*/
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public static FileSystem open() {
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synchronized (lock) {
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if (fs == null) {
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fs = new FileSystemImpl();
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}
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return fs;
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}
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}
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/**
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* Tells whether or not the specified file is located on a
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* file system that supports file security or not.
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*
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* @throws IOException if an I/O error occurs.
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*/
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public abstract boolean supportsFileSecurity(File f) throws IOException;
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/**
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* Tell whether or not the specified file is accessible
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* by anything other than the file owner.
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*
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* @throws IOException if an I/O error occurs.
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*
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* @throws UnsupportedOperationException
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* If file is located on a file system that doesn't support
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* file security.
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*/
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public abstract boolean isAccessUserOnly(File f) throws IOException;
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}
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