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      1 /*
      2  * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
      3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
      4  *
      5  * This code is free software; you can redistribute it and/or modify it
      6  * under the terms of the GNU General Public License version 2 only, as
      7  * published by the Free Software Foundation.  Oracle designates this
      8  * particular file as subject to the "Classpath" exception as provided
      9  * by Oracle in the LICENSE file that accompanied this code.
     10  *
     11  * This code is distributed in the hope that it will be useful, but WITHOUT
     12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
     13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
     14  * version 2 for more details (a copy is included in the LICENSE file that
     15  * accompanied this code).
     16  *
     17  * You should have received a copy of the GNU General Public License version
     18  * 2 along with this work; if not, write to the Free Software Foundation,
     19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
     20  *
     21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
     22  * or visit www.oracle.com if you need additional information or have any
     23  * questions.
     24  */
     25 
     26 package sun.nio.fs;
     27 
     28 import java.nio.file.attribute.*;
     29 import java.util.*;
     30 import java.io.IOException;
     31 
     32 /**
     33  * An implementation of FileOwnerAttributeView that delegates to a given
     34  * PosixFileAttributeView or AclFileAttributeView object.
     35  */
     36 
     37 final class FileOwnerAttributeViewImpl
     38     implements FileOwnerAttributeView, DynamicFileAttributeView
     39 {
     40     private static final String OWNER_NAME = "owner";
     41 
     42     private final FileAttributeView view;
     43     private final boolean isPosixView;
     44 
     45     FileOwnerAttributeViewImpl(PosixFileAttributeView view) {
     46         this.view = view;
     47         this.isPosixView = true;
     48     }
     49 
     50     FileOwnerAttributeViewImpl(AclFileAttributeView view) {
     51         this.view = view;
     52         this.isPosixView = false;
     53     }
     54 
     55     @Override
     56     public String name() {
     57         return "owner";
     58     }
     59 
     60     @Override
     61     public void setAttribute(String attribute, Object value)
     62         throws IOException
     63     {
     64         if (attribute.equals(OWNER_NAME)) {
     65             setOwner((UserPrincipal)value);
     66         } else {
     67             throw new IllegalArgumentException("'" + name() + ":" +
     68                 attribute + "' not recognized");
     69         }
     70     }
     71 
     72     @Override
     73     public Map<String,Object> readAttributes(String[] attributes) throws IOException {
     74         Map<String,Object> result = new HashMap<>();
     75         for (String attribute: attributes) {
     76             if (attribute.equals("*") || attribute.equals(OWNER_NAME)) {
     77                 result.put(OWNER_NAME, getOwner());
     78             } else {
     79                 throw new IllegalArgumentException("'" + name() + ":" +
     80                     attribute + "' not recognized");
     81             }
     82         }
     83         return result;
     84     }
     85 
     86     @Override
     87     public UserPrincipal getOwner() throws IOException {
     88         if (isPosixView) {
     89             return ((PosixFileAttributeView)view).readAttributes().owner();
     90         } else {
     91             return ((AclFileAttributeView)view).getOwner();
     92         }
     93     }
     94 
     95     @Override
     96     public void setOwner(UserPrincipal owner)
     97         throws IOException
     98     {
     99         if (isPosixView) {
    100             ((PosixFileAttributeView)view).setOwner(owner);
    101         } else {
    102             ((AclFileAttributeView)view).setOwner(owner);
    103         }
    104     }
    105  }
    106