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
26package sun.nio.fs;
27
28import java.nio.file.attribute.*;
29import java.util.*;
30import java.io.IOException;
31
32/**
33 * An implementation of FileOwnerAttributeView that delegates to a given
34 * PosixFileAttributeView or AclFileAttributeView object.
35 */
36
37final 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