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/*
* Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.nio.fs;
import java.nio.file.*;
import java.io.IOException;
/**
* Internal exception thrown by native methods when error detected.
*/
class UnixException extends Exception {
static final long serialVersionUID = 7227016794320723218L;
private int errno;
private String msg;
UnixException(int errno) {
this.errno = errno;
this.msg = null;
}
UnixException(String msg) {
this.errno = 0;
this.msg = msg;
}
int errno() {
return errno;
}
void setError(int errno) {
this.errno = errno;
this.msg = null;
}
String errorString() {
if (msg != null) {
return msg;
} else {
return Util.toString(UnixNativeDispatcher.strerror(errno()));
}
}
@Override
public String getMessage() {
return errorString();
}
/**
* Map well known errors to specific exceptions where possible; otherwise
* return more general FileSystemException.
*/
private IOException translateToIOException(String file, String other) {
// created with message rather than errno
if (msg != null)
return new IOException(msg);
// handle specific cases
if (errno() == UnixConstants.EACCES)
return new AccessDeniedException(file, other, null);
if (errno() == UnixConstants.ENOENT)
return new NoSuchFileException(file, other, null);
if (errno() == UnixConstants.EEXIST)
return new FileAlreadyExistsException(file, other, null);
// fallback to the more general exception
return new FileSystemException(file, other, errorString());
}
void rethrowAsIOException(String file) throws IOException {
IOException x = translateToIOException(file, null);
throw x;
}
void rethrowAsIOException(UnixPath file, UnixPath other) throws IOException {
String a = (file == null) ? null : file.getPathForExceptionMessage();
String b = (other == null) ? null : other.getPathForExceptionMessage();
IOException x = translateToIOException(a, b);
throw x;
}
void rethrowAsIOException(UnixPath file) throws IOException {
rethrowAsIOException(file, null);
}
IOException asIOException(UnixPath file) {
return translateToIOException(file.getPathForExceptionMessage(), null);
}
}
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