author | alanb |
Sun, 15 Feb 2009 12:25:54 +0000 | |
changeset 2057 | 3acf8e5e2ca0 |
child 3065 | 452aaa2899fc |
permissions | -rw-r--r-- |
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/* |
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* Copyright 2008-2009 Sun Microsystems, Inc. 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. Sun designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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* CA 95054 USA or visit www.sun.com if you need additional information or |
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* have any questions. |
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*/ |
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package sun.nio.fs; |
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|
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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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/** |
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* Base implementation of NamedAttributeView |
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*/ |
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|
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abstract class AbstractUserDefinedFileAttributeView |
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implements UserDefinedFileAttributeView |
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{ |
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protected AbstractUserDefinedFileAttributeView() { } |
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|
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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 "xattr"; |
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} |
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@Override |
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public final Object getAttribute(String attribute) throws IOException { |
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int size; |
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try { |
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size = size(attribute); |
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} catch (IOException e) { |
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// not found or some other I/O error |
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if (list().contains(attribute)) |
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throw e; |
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return null; |
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} |
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byte[] buf = new byte[size]; |
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int n = read(attribute, ByteBuffer.wrap(buf)); |
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return (n == size) ? buf : Arrays.copyOf(buf, n); |
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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,?> readAttributes(String first, String... rest) |
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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<String>(); |
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|
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boolean readAll = false; |
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if (first.equals("*")) { |
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readAll = true; |
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} else { |
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names.add(first); |
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} |
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for (String name: rest) { |
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if (name.equals("*")) { |
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readAll = true; |
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} else { |
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names.add(name); |
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} |
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} |
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if (readAll) |
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names = list(); |
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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<String,Object>(); |
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for (String name: names) { |
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Object value = getAttribute(name); |
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if (value != null) |
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result.put(name, value); |
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} |
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|
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return result; |
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} |
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} |