001    /*
002     * Copyright (c) Andrey Kuznetsov. All Rights Reserved.
003     *
004     * http://uio.imagero.com
005     *
006     * Redistribution and use in source and binary forms, with or without
007     * modification, are permitted provided that the following conditions are met:
008     *
009     *  o Redistributions of source code must retain the above copyright notice,
010     *    this list of conditions and the following disclaimer.
011     *
012     *  o Redistributions in binary form must reproduce the above copyright notice,
013     *    this list of conditions and the following disclaimer in the documentation
014     *    and/or other materials provided with the distribution.
015     *
016     *  o Neither the name of Andrey Kuznetsov nor the names of
017     *    its contributors may be used to endorse or promote products derived
018     *    from this software without specific prior written permission.
019     *
020     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
021     * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
022     * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
023     * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
024     * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
025     * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
026     * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
027     * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
028     * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
029     * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
030     * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
031     */
032    
033    package com.imagero.uio.impl;
034    
035    import com.imagero.uio.io.IOutils;
036    
037    import java.io.File;
038    import java.io.IOException;
039    import java.io.RandomAccessFile;
040    
041    /**
042     * Enhanced RandomAccessFile which
043     * a) closes itself on finalization
044     * and
045     * b) knows if it's writable or not
046     *
047     * @author Andrey Kuznetsov
048     */
049    public class RandomAccessFileX extends RandomAccessFile {
050    
051        String mode;
052    
053        public RandomAccessFileX(String name, String mode) throws IOException {
054            super(name, mode);
055            this.mode = mode;
056        }
057    
058        public RandomAccessFileX(File file, String mode) throws IOException {
059            super(file, mode);
060            this.mode = mode;
061        }
062    
063        protected void finalize() throws Throwable {
064            super.finalize();
065            IOutils.closeStream(this);
066        }
067    
068        public String getMode() {
069            return mode;
070        }
071    
072        public boolean writable() {
073            return "rw".equals(mode);
074        }
075    }