1 /*

     2  * Copyright 2008-2009 Sun Microsystems, Inc.  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.  Sun designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any questions.

    24  */

    25 

    26 package sun.nio.fs;

    27 

    28 

    29 import java.nio.file.attribute.*;

    30 import java.util.*;

    31 import java.util.concurrent.TimeUnit;

    32 import java.io.IOException;

    33 

    34 import static sun.nio.fs.WindowsNativeDispatcher.*;

    35 import static sun.nio.fs.WindowsConstants.*;

    36 

    37 class WindowsFileAttributeViews {

    38 

    39     private static class Basic extends AbstractBasicFileAttributeView {

    40         final WindowsPath file;

    41         final boolean followLinks;

    42 

    43         Basic(WindowsPath file, boolean followLinks) {

    44             this.file = file;

    45             this.followLinks = followLinks;

    46         }

    47 

    48         @Override

    49         public WindowsFileAttributes readAttributes() throws IOException {

    50             try {

    51                 return WindowsFileAttributes.get(file, followLinks);

    52             } catch (WindowsException x) {

    53                 x.rethrowAsIOException(file);

    54                 return null;    // keep compiler happy

    55             }

    56         }

    57 

    58         /**

    59          * Parameter values in Windows times.

    60          */

    61         void setFileTimes(long createTime, long lastAccessTime, long lastWriteTime)

    62             throws IOException

    63         {

    64             long handle = -1L;

    65             try {

    66                 int flags = FILE_FLAG_BACKUP_SEMANTICS;

    67                 if (!followLinks && file.getFileSystem().supportsLinks())

    68                     flags |= FILE_FLAG_OPEN_REPARSE_POINT;

    69 

    70                 handle = CreateFile(file.getPathForWin32Calls(),

    71                                     FILE_WRITE_ATTRIBUTES,

    72                                     (FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE),

    73                                     OPEN_EXISTING,

    74                                     flags);

    75             } catch (WindowsException x) {

    76                 x.rethrowAsIOException(file);

    77             }

    78 

    79             // update attributes

    80             try {

    81                 SetFileTime(handle, createTime, lastAccessTime, lastWriteTime);

    82             } catch (WindowsException x) {

    83                 x.rethrowAsIOException(file);

    84             } finally {

    85                 CloseHandle(handle);

    86             }

    87         }

    88 

    89         @Override

    90         public void setTimes(Long lastModifiedTime,

    91                              Long lastAccessTime,

    92                              Long createTime,

    93                              TimeUnit unit) throws IOException

    94         {

    95             file.checkWrite();

    96 

    97             // if all null then do nothing

    98             if (lastModifiedTime == null && lastAccessTime == null &&

    99                 createTime == null)

   100             {

   101                 // no effect

   102                 return;

   103             }

   104 

   105             // null => no change

   106             // -1 => change to current time

   107             long now = System.currentTimeMillis();

   108             long modTime = 0L, accTime = 0L, crTime = 0L;

   109             if (lastModifiedTime != null) {

   110                 if (lastModifiedTime < 0L) {

   111                     if (lastModifiedTime != -1L)

   112                         throw new IllegalArgumentException();

   113                     modTime = now;

   114                 } else {

   115                     modTime = TimeUnit.MILLISECONDS.convert(lastModifiedTime, unit);

   116                 }

   117                 modTime = WindowsFileAttributes.toWindowsTime(modTime);

   118             }

   119             if (lastAccessTime != null) {

   120                 if (lastAccessTime < 0L) {

   121                     if (lastAccessTime != -1L)

   122                         throw new IllegalArgumentException();

   123                     accTime = now;

   124                 } else {

   125                     accTime = TimeUnit.MILLISECONDS.convert(lastAccessTime, unit);

   126                 }

   127                 accTime = WindowsFileAttributes.toWindowsTime(accTime);

   128             }

   129             if (createTime != null) {

   130                 if (createTime < 0L) {

   131                     if (createTime != -1L)

   132                         throw new IllegalArgumentException();

   133                     crTime = now;

   134                 } else {

   135                     crTime = TimeUnit.MILLISECONDS.convert(createTime, unit);

   136                 }

   137                 crTime = WindowsFileAttributes.toWindowsTime(crTime);

   138             }

   139 

   140             setFileTimes(crTime, accTime, modTime);

   141         }

   142     }

   143 

   144     static class Dos extends Basic implements DosFileAttributeView {

   145         private static final String READONLY_NAME = "readonly";

   146         private static final String ARCHIVE_NAME = "archive";

   147         private static final String SYSTEM_NAME = "system";

   148         private static final String HIDDEN_NAME = "hidden";

   149         private static final String ATTRIBUTES_NAME = "attributes";

   150 

   151         Dos(WindowsPath file, boolean followLinks) {

   152             super(file, followLinks);

   153         }

   154 

   155         @Override

   156         public String name() {

   157             return "dos";

   158         }

   159 

   160         @Override

   161         public Object getAttribute(String attribute) throws IOException {

   162             if (attribute.equals(READONLY_NAME))

   163                 return readAttributes().isReadOnly();

   164             if (attribute.equals(ARCHIVE_NAME))

   165                 return readAttributes().isArchive();

   166             if (attribute.equals(SYSTEM_NAME))

   167                 return readAttributes().isSystem();

   168             if (attribute.equals(HIDDEN_NAME))

   169                 return readAttributes().isHidden();

   170             // implementation specific

   171             if (attribute.equals(ATTRIBUTES_NAME))

   172                 return readAttributes().attributes();

   173             return super.getAttribute(attribute);

   174         }

   175 

   176         @Override

   177         public void setAttribute(String attribute, Object value)

   178             throws IOException

   179         {

   180             if (attribute.equals(READONLY_NAME)) {

   181                 setReadOnly((Boolean)value);

   182                 return;

   183             }

   184             if (attribute.equals(ARCHIVE_NAME)) {

   185                 setArchive((Boolean)value);

   186                 return;

   187             }

   188             if (attribute.equals(SYSTEM_NAME)) {

   189                 setSystem((Boolean)value);

   190                 return;

   191             }

   192             if (attribute.equals(HIDDEN_NAME)) {

   193                 setHidden((Boolean)value);

   194                 return;

   195             }

   196             super.setAttribute(attribute, value);

   197         }

   198 

   199         @Override

   200         public Map<String,?> readAttributes(String first, String[] rest)

   201             throws IOException

   202         {

   203             AttributesBuilder builder = AttributesBuilder.create(first, rest);

   204             WindowsFileAttributes attrs = readAttributes();

   205             addBasicAttributesToBuilder(attrs, builder);

   206             if (builder.match(READONLY_NAME))

   207                 builder.add(READONLY_NAME, attrs.isReadOnly());

   208             if (builder.match(ARCHIVE_NAME))

   209                 builder.add(ARCHIVE_NAME, attrs.isArchive());

   210             if (builder.match(SYSTEM_NAME))

   211                 builder.add(SYSTEM_NAME, attrs.isSystem());

   212             if (builder.match(HIDDEN_NAME))

   213                 builder.add(HIDDEN_NAME, attrs.isHidden());

   214             if (builder.match(ATTRIBUTES_NAME))

   215                 builder.add(ATTRIBUTES_NAME, attrs.attributes());

   216             return builder.unmodifiableMap();

   217         }

   218 

   219         /**

   220          * Update DOS attributes

   221          */

   222         private void updateAttributes(int flag, boolean enable)

   223             throws IOException

   224         {

   225             file.checkWrite();

   226 

   227             // GetFileAttribtues & SetFileAttributes do not follow links so when

   228             // following links we need the final target

   229             String path = WindowsLinkSupport.getFinalPath(file, followLinks);

   230             try {

   231                 int oldValue = GetFileAttributes(path);

   232                 int newValue = oldValue;

   233                 if (enable) {

   234                     newValue |= flag;

   235                 } else {

   236                     newValue &= ~flag;

   237                 }

   238                 if (newValue != oldValue) {

   239                     SetFileAttributes(path, newValue);

   240                 }

   241             } catch (WindowsException x) {

   242                 // don't reveal target in exception

   243                 x.rethrowAsIOException(file);

   244             }

   245         }

   246 

   247         @Override

   248         public void setReadOnly(boolean value) throws IOException {

   249             updateAttributes(FILE_ATTRIBUTE_READONLY, value);

   250         }

   251 

   252         @Override

   253         public void setHidden(boolean value) throws IOException {

   254             updateAttributes(FILE_ATTRIBUTE_HIDDEN, value);

   255         }

   256 

   257         @Override

   258         public void setArchive(boolean value) throws IOException {

   259             updateAttributes(FILE_ATTRIBUTE_ARCHIVE, value);

   260         }

   261 

   262         @Override

   263         public void setSystem(boolean value) throws IOException {

   264             updateAttributes(FILE_ATTRIBUTE_SYSTEM, value);

   265         }

   266 

   267         // package-private

   268         // Copy given attributes to the file.

   269         void setAttributes(WindowsFileAttributes attrs)

   270             throws IOException

   271         {

   272             // copy DOS attributes to target

   273             int flags = 0;

   274             if (attrs.isReadOnly()) flags |= FILE_ATTRIBUTE_READONLY;

   275             if (attrs.isHidden()) flags |= FILE_ATTRIBUTE_HIDDEN;

   276             if (attrs.isArchive()) flags |= FILE_ATTRIBUTE_ARCHIVE;

   277             if (attrs.isSystem()) flags |= FILE_ATTRIBUTE_SYSTEM;

   278             updateAttributes(flags, true);

   279 

   280             // copy file times to target - must be done after updating FAT attributes

   281             // as otherwise the last modified time may be wrong.

   282             setFileTimes(

   283                 WindowsFileAttributes.toWindowsTime(attrs.creationTime()),

   284                 WindowsFileAttributes.toWindowsTime(attrs.lastModifiedTime()),

   285                 WindowsFileAttributes.toWindowsTime(attrs.lastAccessTime()));

   286         }

   287     }

   288 

   289     static BasicFileAttributeView createBasicView(WindowsPath file, boolean followLinks) {

   290         return new Basic(file, followLinks);

   291     }

   292 

   293     static WindowsFileAttributeViews.Dos createDosView(WindowsPath file, boolean followLinks) {

   294         return new Dos(file, followLinks);

   295     }

   296 }