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 import java.nio.file.attribute.*;

    29 import java.io.IOException;

    30 import java.util.*;

    31 

    32 /**

    33  * Base implementation of FileStoreSpaceAttributeView

    34  */

    35 

    36 abstract class AbstractFileStoreSpaceAttributeView

    37     implements FileStoreSpaceAttributeView

    38 {

    39     private static final String TOTAL_SPACE_NAME = "totalSpace";

    40     private static final String USABLE_SPACE_NAME = "usableSpace";

    41     private static final String UNALLOCATED_SPACE_NAME = "unallocatedSpace";

    42 

    43     @Override

    44     public final String name() {

    45         return "space";

    46     }

    47 

    48     @Override

    49     public final Object getAttribute(String attribute) throws IOException {

    50         FileStoreSpaceAttributes attrs = readAttributes();

    51         if (attribute.equals(TOTAL_SPACE_NAME))

    52             return attrs.totalSpace();

    53         if (attribute.equals(USABLE_SPACE_NAME))

    54             return attrs.usableSpace();

    55         if (attribute.equals(UNALLOCATED_SPACE_NAME))

    56             return attrs.unallocatedSpace();

    57         return null;

    58     }

    59 

    60     @Override

    61     public final void setAttribute(String attribute, Object value)

    62         throws IOException

    63     {

    64         if (attribute == null || value == null)

    65             throw new NullPointerException();

    66         throw new UnsupportedOperationException();

    67     }

    68 

    69     @Override

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

    71         throws IOException

    72     {

    73         boolean total = false;

    74         boolean usable = false;

    75         boolean unallocated = false;

    76 

    77         if (first.equals(TOTAL_SPACE_NAME)) total = true;

    78         else if (first.equals(USABLE_SPACE_NAME)) usable = true;

    79         else if (first.equals(UNALLOCATED_SPACE_NAME)) unallocated = true;

    80         else if (first.equals("*")) {

    81             total = true;

    82             usable = true;

    83             unallocated = true;

    84         }

    85 

    86         if (!total || !usable || !unallocated) {

    87             for (String attribute: rest) {

    88                 if (attribute.equals("*")) {

    89                     total = true;

    90                     usable = true;

    91                     unallocated = true;

    92                     break;

    93                 }

    94                 if (attribute.equals(TOTAL_SPACE_NAME)) {

    95                     total = true;

    96                     continue;

    97                 }

    98                 if (attribute.equals(USABLE_SPACE_NAME)) {

    99                     usable = true;

   100                     continue;

   101                 }

   102                 if (attribute.equals(UNALLOCATED_SPACE_NAME)) {

   103                     unallocated = true;

   104                     continue;

   105                 }

   106             }

   107         }

   108 

   109         FileStoreSpaceAttributes attrs = readAttributes();

   110         Map<String,Object> result = new HashMap<String,Object>(2);

   111         if (total)

   112             result.put(TOTAL_SPACE_NAME, attrs.totalSpace());

   113         if (usable)

   114             result.put(USABLE_SPACE_NAME, attrs.usableSpace());

   115         if (unallocated)

   116             result.put(UNALLOCATED_SPACE_NAME, attrs.unallocatedSpace());

   117         return Collections.unmodifiableMap(result);

   118     }

   119 }