/*
* Copyright (c) 2010. Stephen Connolly.
* Copyright (c) 2006. Michael Hartle <mhartle@rbg.informatik.tu-darmstadt.de>.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.github.stephenc.javaisotools.sabre.util;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import com.github.stephenc.javaisotools.sabre.Fixup;
import com.github.stephenc.javaisotools.sabre.impl.FileFixup;
public class SingleFileFixupList {
private static int fixupLength = 16;
private File originalIndexFile = null;
private RandomAccessFile indexFile = null;
private RandomAccessFile fixedFile = null;
private int fixupCount = 0;
public SingleFileFixupList(RandomAccessFile fixedFile, File indexFile) throws FileNotFoundException {
this.fixedFile = fixedFile;
this.originalIndexFile = indexFile;
this.indexFile = new RandomAccessFile(indexFile, "rw");
}
public synchronized void addLast(Fixup fixup) {
FileFixup fileFixup = null;
if (fixup instanceof FileFixup) {
fileFixup = (FileFixup) fixup;
if (this.fixedFile != null) {
if (this.fixedFile != fileFixup.getFile()) {
throw new RuntimeException();
}
} else {
// The first fixup file is used if undefined
this.fixedFile = fileFixup.getFile();
}
try {
this.indexFile.seek(this.fixupCount * fixupLength);
this.indexFile.writeLong(fileFixup.getPosition());
this.indexFile.writeLong(fileFixup.getAvailable());
this.fixupCount++;
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
public synchronized Fixup get(int index) {
Fixup result = null;
long position = 0;
long available = 0;
try {
if (index < this.fixupCount) {
this.indexFile.seek(index * fixupLength);
position = this.indexFile.readLong();
available = this.indexFile.readLong();
result = new FileFixup(this.fixedFile, position, available);
} else {
System.out.println("Autsch");
// throw new IndexOutOfBoundsException();
}
} catch (IOException e) {
throw new RuntimeException(e);
}
return result;
}
public void delete() throws IOException {
this.indexFile.close();
this.originalIndexFile.delete();
}
}