author | bpb |
Fri, 01 Nov 2019 13:16:50 -0700 | |
changeset 58897 | 76638c631869 |
parent 53018 | 8bf9268df0e2 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008, 2019, Oracle and/or its affiliates. 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. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.nio.fs; |
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import java.nio.file.*; |
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import java.nio.file.attribute.*; |
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import java.io.IOException; |
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import static sun.nio.fs.WindowsConstants.*; |
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import static sun.nio.fs.WindowsNativeDispatcher.*; |
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/** |
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* Windows implementation of FileStore. |
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*/ |
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class WindowsFileStore |
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extends FileStore |
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{ |
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private final String root; |
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private final VolumeInformation volInfo; |
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private final int volType; |
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private final String displayName; // returned by toString |
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private WindowsFileStore(String root) throws WindowsException { |
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assert root.charAt(root.length()-1) == '\\'; |
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this.root = root; |
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this.volInfo = GetVolumeInformation(root); |
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this.volType = GetDriveType(root); |
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// file store "display name" is the volume name if available |
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String vol = volInfo.volumeName(); |
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if (!vol.isEmpty()) { |
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this.displayName = vol; |
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} else { |
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// TBD - should we map all types? Does this need to be localized? |
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this.displayName = (volType == DRIVE_REMOVABLE) ? "Removable Disk" : ""; |
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} |
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} |
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static WindowsFileStore create(String root, boolean ignoreNotReady) |
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throws IOException |
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{ |
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try { |
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return new WindowsFileStore(root); |
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} catch (WindowsException x) { |
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if (ignoreNotReady && x.lastError() == ERROR_NOT_READY) |
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return null; |
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x.rethrowAsIOException(root); |
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return null; // keep compiler happy |
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} |
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} |
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static WindowsFileStore create(WindowsPath file) throws IOException { |
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try { |
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// if the file is a link then GetVolumePathName returns the |
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// volume that the link is on so we need to call it with the |
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// final target |
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String target = WindowsLinkSupport.getFinalPath(file, true); |
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try { |
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return createFromPath(target); |
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} catch (WindowsException e) { |
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if (e.lastError() != ERROR_DIR_NOT_ROOT) |
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throw e; |
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target = WindowsLinkSupport.getFinalPath(file); |
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if (target == null) |
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throw new FileSystemException(file.getPathForExceptionMessage(), |
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null, "Couldn't resolve path"); |
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return createFromPath(target); |
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} |
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} catch (WindowsException x) { |
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x.rethrowAsIOException(file); |
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return null; // keep compiler happy |
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} |
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} |
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private static WindowsFileStore createFromPath(String target) throws WindowsException { |
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String root = GetVolumePathName(target); |
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return new WindowsFileStore(root); |
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} |
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VolumeInformation volumeInformation() { |
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return volInfo; |
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} |
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int volumeType() { |
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return volType; |
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} |
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@Override |
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public String name() { |
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return volInfo.volumeName(); // "SYSTEM", "DVD-RW", ... |
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} |
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@Override |
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public String type() { |
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return volInfo.fileSystemName(); // "FAT", "NTFS", ... |
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} |
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121 |
|
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@Override |
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public boolean isReadOnly() { |
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return ((volInfo.flags() & FILE_READ_ONLY_VOLUME) != 0); |
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} |
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126 |
|
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// read the free space info |
47428 | 128 |
private DiskFreeSpace readDiskFreeSpaceEx() throws IOException { |
129 |
try { |
|
130 |
return GetDiskFreeSpaceEx(root); |
|
131 |
} catch (WindowsException x) { |
|
132 |
x.rethrowAsIOException(root); |
|
133 |
return null; |
|
134 |
} |
|
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} |
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136 |
||
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private DiskFreeSpace readDiskFreeSpace() throws IOException { |
138 |
try { |
|
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return GetDiskFreeSpace(root); |
8158 | 140 |
} catch (WindowsException x) { |
141 |
x.rethrowAsIOException(root); |
|
142 |
return null; |
|
143 |
} |
|
144 |
} |
|
145 |
||
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@Override |
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public long getTotalSpace() throws IOException { |
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long space = readDiskFreeSpaceEx().totalNumberOfBytes(); |
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return space >= 0 ? space : Long.MAX_VALUE; |
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} |
151 |
||
152 |
@Override |
|
153 |
public long getUsableSpace() throws IOException { |
|
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long space = readDiskFreeSpaceEx().freeBytesAvailable(); |
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return space >= 0 ? space : Long.MAX_VALUE; |
8158 | 156 |
} |
157 |
||
158 |
@Override |
|
159 |
public long getUnallocatedSpace() throws IOException { |
|
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long space = readDiskFreeSpaceEx().freeBytesAvailable(); |
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return space >= 0 ? space : Long.MAX_VALUE; |
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} |
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163 |
|
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164 |
@Override |
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165 |
public long getBlockSize() throws IOException { |
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return readDiskFreeSpace().bytesPerSector(); |
8158 | 167 |
} |
168 |
||
169 |
@Override |
|
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170 |
public <V extends FileStoreAttributeView> V getFileStoreAttributeView(Class<V> type) { |
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171 |
if (type == null) |
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172 |
throw new NullPointerException(); |
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return (V) null; |
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174 |
} |
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|
175 |
|
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176 |
@Override |
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177 |
public Object getAttribute(String attribute) throws IOException { |
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// standard |
8158 | 179 |
if (attribute.equals("totalSpace")) |
180 |
return getTotalSpace(); |
|
181 |
if (attribute.equals("usableSpace")) |
|
182 |
return getUsableSpace(); |
|
183 |
if (attribute.equals("unallocatedSpace")) |
|
184 |
return getUnallocatedSpace(); |
|
47428 | 185 |
if (attribute.equals("bytesPerSector")) |
186 |
return getBlockSize(); |
|
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187 |
// windows specific for testing purposes |
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188 |
if (attribute.equals("volume:vsn")) |
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189 |
return volInfo.volumeSerialNumber(); |
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190 |
if (attribute.equals("volume:isRemovable")) |
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|
191 |
return volType == DRIVE_REMOVABLE; |
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|
192 |
if (attribute.equals("volume:isCdrom")) |
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193 |
return volType == DRIVE_CDROM; |
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194 |
throw new UnsupportedOperationException("'" + attribute + "' not recognized"); |
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195 |
} |
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|
196 |
|
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|
197 |
@Override |
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|
198 |
public boolean supportsFileAttributeView(Class<? extends FileAttributeView> type) { |
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|
199 |
if (type == null) |
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|
200 |
throw new NullPointerException(); |
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|
201 |
if (type == BasicFileAttributeView.class || type == DosFileAttributeView.class) |
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202 |
return true; |
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|
203 |
if (type == AclFileAttributeView.class || type == FileOwnerAttributeView.class) |
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204 |
return ((volInfo.flags() & FILE_PERSISTENT_ACLS) != 0); |
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|
205 |
if (type == UserDefinedFileAttributeView.class) |
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|
206 |
return ((volInfo.flags() & FILE_NAMED_STREAMS) != 0); |
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|
207 |
return false; |
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|
208 |
} |
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|
209 |
|
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|
210 |
@Override |
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|
211 |
public boolean supportsFileAttributeView(String name) { |
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|
212 |
if (name.equals("basic") || name.equals("dos")) |
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|
213 |
return true; |
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|
214 |
if (name.equals("acl")) |
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|
215 |
return supportsFileAttributeView(AclFileAttributeView.class); |
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|
216 |
if (name.equals("owner")) |
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|
217 |
return supportsFileAttributeView(FileOwnerAttributeView.class); |
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|
218 |
if (name.equals("user")) |
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|
219 |
return supportsFileAttributeView(UserDefinedFileAttributeView.class); |
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|
220 |
return false; |
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|
221 |
} |
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|
222 |
|
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|
223 |
@Override |
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|
224 |
public boolean equals(Object ob) { |
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|
225 |
if (ob == this) |
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|
226 |
return true; |
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|
227 |
if (!(ob instanceof WindowsFileStore)) |
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|
228 |
return false; |
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|
229 |
WindowsFileStore other = (WindowsFileStore)ob; |
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|
230 |
return root.equals(other.root); |
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|
231 |
} |
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|
232 |
|
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|
233 |
@Override |
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|
234 |
public int hashCode() { |
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|
235 |
return root.hashCode(); |
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|
236 |
} |
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|
237 |
|
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|
238 |
@Override |
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|
239 |
public String toString() { |
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|
240 |
StringBuilder sb = new StringBuilder(displayName); |
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|
241 |
if (sb.length() > 0) |
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|
242 |
sb.append(" "); |
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|
243 |
sb.append("("); |
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|
244 |
// drop trailing slash |
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|
245 |
sb.append(root.subSequence(0, root.length()-1)); |
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|
246 |
sb.append(")"); |
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|
247 |
return sb.toString(); |
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|
248 |
} |
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249 |
} |