author | redestad |
Thu, 13 Dec 2018 15:31:05 +0100 | |
changeset 53018 | 8bf9268df0e2 |
parent 47216 | 71c04702a3d5 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008, 2011, 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.nio.fs; |
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import java.nio.ByteBuffer; |
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import java.nio.file.attribute.UserDefinedFileAttributeView; |
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import java.io.IOException; |
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import java.util.*; |
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/** |
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* Base implementation of UserDefinedAttributeView |
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*/ |
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abstract class AbstractUserDefinedFileAttributeView |
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implements UserDefinedFileAttributeView, DynamicFileAttributeView |
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{ |
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protected AbstractUserDefinedFileAttributeView() { } |
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protected void checkAccess(String file, |
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boolean checkRead, |
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boolean checkWrite) |
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{ |
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assert checkRead || checkWrite; |
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SecurityManager sm = System.getSecurityManager(); |
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if (sm != null) { |
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if (checkRead) |
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sm.checkRead(file); |
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if (checkWrite) |
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sm.checkWrite(file); |
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sm.checkPermission(new RuntimePermission("accessUserDefinedAttributes")); |
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} |
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} |
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@Override |
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public final String name() { |
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return "user"; |
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} |
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@Override |
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public final void setAttribute(String attribute, Object value) |
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throws IOException |
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{ |
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ByteBuffer bb; |
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if (value instanceof byte[]) { |
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bb = ByteBuffer.wrap((byte[])value); |
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} else { |
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bb = (ByteBuffer)value; |
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} |
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write(attribute, bb); |
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} |
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@Override |
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public final Map<String,Object> readAttributes(String[] attributes) |
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throws IOException |
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{ |
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// names of attributes to return |
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List<String> names = new ArrayList<>(); |
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for (String name: attributes) { |
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if (name.equals("*")) { |
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names = list(); |
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break; |
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} else { |
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if (name.isEmpty()) |
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throw new IllegalArgumentException(); |
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names.add(name); |
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} |
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} |
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// read each value and return in map |
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Map<String,Object> result = new HashMap<>(); |
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for (String name: names) { |
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int size = size(name); |
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byte[] buf = new byte[size]; |
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int n = read(name, ByteBuffer.wrap(buf)); |
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byte[] value = (n == size) ? buf : Arrays.copyOf(buf, n); |
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result.put(name, value); |
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} |
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return result; |
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} |
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} |