jdk/src/solaris/classes/sun/nio/fs/UnixException.java
author ohair
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permissions -rw-r--r--
6943119: Rebrand source copyright notices Reviewed-by: darcy, weijun
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/*
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 * Copyright (c) 2008, 2009, 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.io.IOException;
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/**
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 * Internal exception thrown by native methods when error detected.
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 */
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class UnixException extends Exception {
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    static final long serialVersionUID = 7227016794320723218L;
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    private int errno;
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    private String msg;
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    UnixException(int errno) {
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        this.errno = errno;
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        this.msg = null;
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    }
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    UnixException(String msg) {
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        this.errno = 0;
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        this.msg = msg;
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    }
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    int errno() {
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        return errno;
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    }
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    void setError(int errno) {
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        this.errno = errno;
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        this.msg = null;
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    }
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    String errorString() {
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        if (msg != null) {
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            return msg;
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        } else {
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            return new String(UnixNativeDispatcher.strerror(errno()));
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        }
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    }
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    @Override
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    public String getMessage() {
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        return errorString();
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    }
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    /**
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     * Map well known errors to specific exceptions where possible; otherwise
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     * return more general FileSystemException.
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     */
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    private IOException translateToIOException(String file, String other) {
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        // created with message rather than errno
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        if (msg != null)
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            return new IOException(msg);
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        // handle specific cases
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        if (errno() == UnixConstants.EACCES)
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            return new AccessDeniedException(file, other, null);
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        if (errno() == UnixConstants.ENOENT)
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            return new NoSuchFileException(file, other, null);
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        if (errno() == UnixConstants.EEXIST)
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            return new FileAlreadyExistsException(file, other, null);
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        // fallback to the more general exception
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        return new FileSystemException(file, other, errorString());
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    }
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    void rethrowAsIOException(String file) throws IOException {
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        IOException x = translateToIOException(file, null);
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        throw x;
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    }
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    void rethrowAsIOException(UnixPath file, UnixPath other) throws IOException {
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        String a = (file == null) ? null : file.getPathForExecptionMessage();
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        String b = (other == null) ? null : other.getPathForExecptionMessage();
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        IOException x = translateToIOException(a, b);
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        throw x;
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    }
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    void rethrowAsIOException(UnixPath file) throws IOException {
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        rethrowAsIOException(file, null);
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    }
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    IOException asIOException(UnixPath file) {
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        return translateToIOException(file.getPathForExecptionMessage(), null);
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    }
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}