Clean up dart:io exceptions.

sdk/lib/io/link.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart.io;
 
 /**
  * [Link] objects are references to filesystem links.
  *
  */
@@ skipping 50 matching lines @@
    * On the Windows platform, this will only work with directories, and the
    * target directory must exist.
    */
   void updateSync(String target, {bool linkRelative: false });
 
   /**
    * Deletes the link. Returns a [:Future<Link>:] that completes with
    * the link when it has been deleted. This does not delete, or otherwise
    * affect, the target of the link. It also works on broken links, but if
    * the link does not exist or is not actually a link, it completes the
-   * future with a LinkIOException.
+   * future with a LinkException.
    */
   Future<Link> delete();
 
   /**
    * Synchronously deletes the link. This does not delete, or otherwise
    * affect, the target of the link.  It also works on broken links, but if
    * the link does not exist or is not actually a link, it throws a
-   * LinkIOException.
+   * LinkException.
    */
   void deleteSync();
 
   /**
    * Gets the target of the link. Returns a future that completes with
    * the path to the target.
    *
    * If the returned target is a relative path, it is relative to the
    * directory containing the link.
    *
    * If the link does not exist, or is not a link, the future completes with
-   * a LinkIOException.
+   * a LinkException.
    */
   Future<String> target();
 
   /**
    * Synchronously gets the target of the link. Returns the path to the target.
    *
    * If the returned target is a relative path, it is relative to the
    * directory containing the link.
    *
-   * If the link does not exist, or is not a link, throws a LinkIOException.
+   * If the link does not exist, or is not a link, throws a LinkException.
    */
   String targetSync();
 }
 
 
 class _Link extends FileSystemEntity implements Link {
   final String path;
 
   SendPort _fileService;
 
@@ skipping 94 matching lines @@
   }
 
   String targetSync() {
     var result = _File._linkTarget(path);
     throwIfError(result, "Cannot read link '$path'");
     return result;
   }
 
   static throwIfError(Object result, String msg) {
     if (result is OSError) {
-      throw new LinkIOException(msg, result);
+      throw new LinkException(msg, result);
     }
   }
 
   bool _isErrorResponse(response) {
     return response is List && response[0] != _SUCCESS_RESPONSE;
   }
 
   void _ensureFileService() {
     if (_fileService == null) {
       _fileService = _FileUtils._newServicePort();
     }
   }
 
   _exceptionFromResponse(response, String message) {
     assert(_isErrorResponse(response));
     switch (response[_ERROR_RESPONSE_ERROR_TYPE]) {
       case _ILLEGAL_ARGUMENT_RESPONSE:
         return new ArgumentError();
       case _OSERROR_RESPONSE:
         var err = new OSError(response[_OSERROR_RESPONSE_MESSAGE],
                               response[_OSERROR_RESPONSE_ERROR_CODE]);
-        return new LinkIOException(message, err);
+        return new LinkException(message, err);
       default:
         return new Exception("Unknown error");
     }
   }
 }
 
 
-class LinkIOException implements Exception {
-  const LinkIOException([String this.message = "",
+class LinkException implements IOException {
+  const LinkException([String this.message = "",
                          String this.path = "",
                          OSError this.osError = null]);
   String toString() {
     StringBuffer sb = new StringBuffer();
-    sb.write("LinkIOException");
+    sb.write("LinkException");
     if (!message.isEmpty) {
       sb.write(": $message");
       if (path != null) {
         sb.write(", path = $path");
       }
       if (osError != null) {
         sb.write(" ($osError)");
       }
     } else if (osError != null) {
       sb.write(": $osError");
       if (path != null) {
         sb.write(", path = $path");
       }
     }
     return sb.toString();
   }
   final String message;
   final String path;
   final OSError osError;
 }