| /* |
| * Copyright (c) 2008, 2009, Oracle and/or its affiliates. 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.nio.fs; |
| |
| import java.nio.ByteBuffer; |
| import java.nio.file.attribute.UserDefinedFileAttributeView; |
| import java.io.IOException; |
| import java.util.*; |
| |
| /** |
| * Base implementation of UserDefinedAttributeView |
| */ |
| |
| abstract class AbstractUserDefinedFileAttributeView |
| implements UserDefinedFileAttributeView, DynamicFileAttributeView |
| { |
| protected AbstractUserDefinedFileAttributeView() { } |
| |
| protected void checkAccess(String file, |
| boolean checkRead, |
| boolean checkWrite) |
| { |
| assert checkRead || checkWrite; |
| SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) { |
| if (checkRead) |
| sm.checkRead(file); |
| if (checkWrite) |
| sm.checkWrite(file); |
| sm.checkPermission(new RuntimePermission("accessUserDefinedAttributes")); |
| } |
| } |
| |
| @Override |
| public final String name() { |
| return "user"; |
| } |
| |
| @Override |
| public final Object getAttribute(String attribute) throws IOException { |
| int size; |
| try { |
| size = size(attribute); |
| } catch (IOException e) { |
| // not found or some other I/O error |
| if (list().contains(attribute)) |
| throw e; |
| return null; |
| } |
| |
| byte[] buf = new byte[size]; |
| int n = read(attribute, ByteBuffer.wrap(buf)); |
| return (n == size) ? buf : Arrays.copyOf(buf, n); |
| } |
| |
| @Override |
| public final void setAttribute(String attribute, Object value) |
| throws IOException |
| { |
| ByteBuffer bb; |
| if (value instanceof byte[]) { |
| bb = ByteBuffer.wrap((byte[])value); |
| } else { |
| bb = (ByteBuffer)value; |
| } |
| write(attribute, bb); |
| } |
| |
| @Override |
| public final Map<String,?> readAttributes(String[] attributes) |
| throws IOException |
| { |
| // names of attributes to return |
| List<String> names = new ArrayList<String>(); |
| |
| for (String name: attributes) { |
| if (name.equals("*")) { |
| names = list(); |
| break; |
| } else { |
| names.add(name); |
| } |
| } |
| |
| // read each value and return in map |
| Map<String,Object> result = new HashMap<String,Object>(); |
| for (String name: names) { |
| Object value = getAttribute(name); |
| if (value != null) |
| result.put(name, value); |
| } |
| |
| return result; |
| } |
| } |