1 /*
   2  * Copyright (c) 2008, 2009, 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.*;
  29 import java.io.IOException;
  30 
  31 import static sun.nio.fs.WindowsConstants.*;
  32 
  33 /**
  34  * Internal exception thrown when a Win32 calls fails.
  35  */
  36 
  37 class WindowsException extends Exception {
  38     static final long serialVersionUID = 2765039493083748820L;
  39 
  40     private int lastError;
  41     private String msg;
  42 
  43     WindowsException(int lastError) {
  44         this.lastError = lastError;
  45         this.msg = null;
  46     }
  47 
  48     WindowsException(String msg) {
  49         this.lastError = 0;
  50         this.msg = msg;
  51     }
  52 
  53     int lastError() {
  54         return lastError;
  55     }
  56 
  57     String errorString() {
  58         if (msg == null) {
  59             msg = WindowsNativeDispatcher.FormatMessage(lastError);
  60             if (msg == null) {
  61                 msg = "Unknown error: 0x" + Integer.toHexString(lastError);
  62             }
  63         }
  64         return msg;
  65     }
  66 
  67     @Override
  68     public String getMessage() {
  69         return errorString();
  70     }
  71 
  72     @Override
  73     public Throwable fillInStackTrace() {
  74         // This is an internal exception, the stack trace is irrelevant.
  75         // translateTo* methods would start the stack trace over.
  76         return this;
  77     }
  78 
  79     private IOException translateToIOException(String file, String other) {
  80         // not created with last error
  81         if (lastError() == 0)
  82             return new IOException(errorString());
  83 
  84         // handle specific cases
  85         if (lastError() == ERROR_FILE_NOT_FOUND || lastError() == ERROR_PATH_NOT_FOUND)
  86             return new NoSuchFileException(file, other, null);
  87         if (lastError() == ERROR_FILE_EXISTS || lastError() == ERROR_ALREADY_EXISTS)
  88             return new FileAlreadyExistsException(file, other, null);
  89         if (lastError() == ERROR_ACCESS_DENIED)
  90             return new AccessDeniedException(file, other, null);
  91 
  92         // fallback to the more general exception
  93         return new FileSystemException(file, other, errorString());
  94     }
  95 
  96     void rethrowAsIOException(String file) throws IOException {
  97         IOException x = translateToIOException(file, null);
  98         throw x;
  99     }
 100 
 101     void rethrowAsIOException(WindowsPath file, WindowsPath other) throws IOException {
 102         String a = (file == null) ? null : file.getPathForExceptionMessage();
 103         String b = (other == null) ? null : other.getPathForExceptionMessage();
 104         IOException x = translateToIOException(a, b);
 105         throw x;
 106     }
 107 
 108     void rethrowAsIOException(WindowsPath file) throws IOException {
 109         rethrowAsIOException(file, null);
 110     }
 111 
 112     IOException asIOException(WindowsPath file) {
 113         return translateToIOException(file.getPathForExceptionMessage(), null);
 114     }
 115 
 116 }