/* Copyright (c) 2001-2010, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


package org.hsqldb.persist;

import java.io.FileDescriptor;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;

import org.hsqldb.Database;

/**
 * This class is a simple wapper for a random access file such as used
 * for backup and lobs.
 *
 * @author Fred Toussi (fredt@users dot sourceforge.net)
 * @version  1.9.0
 * @since  1.9.0
 */
final class ScaledRAFileSimple implements ScaledRAInterface {

    final RandomAccessFile file;
    final boolean          readOnly;

    ScaledRAFileSimple(String name,
                       String openMode)
                       throws FileNotFoundException, IOException {
        this.file = new RandomAccessFile(name, openMode);
        readOnly  = openMode.equals("r");
    }

    public long length() throws IOException {
        return file.length();
    }

    /**
     * Some JVM's do not allow seek beyond end of file, so zeros are written
     * first in that case. Reported by bohgammer@users in Open Disucssion
     * Forum.
     */
    public void seek(long position) throws IOException {
        file.seek(position);
    }

    public long getFilePointer() throws IOException {
        return file.getFilePointer();
    }

    public int read() throws IOException {
        return file.read();
    }

    public long readLong() throws IOException {
        return file.readLong();
    }

    public int readInt() throws IOException {
        return file.readInt();
    }

    public void read(byte[] b, int offset, int length) throws IOException {
        file.readFully(b, offset, length);
    }

    public void write(byte[] b, int off, int len) throws IOException {
        file.write(b, off, len);
    }

    public void writeInt(int i) throws IOException {
        file.writeInt(i);
    }

    public void writeLong(long i) throws IOException {
        file.writeLong(i);
    }

    public void close() throws IOException {
        file.close();
    }

    public boolean isReadOnly() {
        return readOnly;
    }

    public boolean wasNio() {
        return false;
    }

    public boolean canAccess(int length) {
        return true;
    }

    public boolean canSeek(long position) {
        return true;
    }

    public Database getDatabase() {
        return null;
    }

    public void synch() {

        try {
            file.getFD().sync();
        } catch (IOException e) {}
    }
}