de.schlichtherle.truezip.fs.archive.zip.CheckedZipDriver Maven / Gradle / Ivy
/*
* Copyright (C) 2005-2015 Schlichtherle IT Services.
* All rights reserved. Use is subject to license terms.
*/
package de.schlichtherle.truezip.fs.archive.zip;
import de.schlichtherle.truezip.socket.IOPoolProvider;
import javax.annotation.concurrent.Immutable;
/**
* An archive driver for ZIP files which checks the CRC-32 values for all
* ZIP entries in input archives.
* The additional CRC-32 computation makes this class slower than its super
* class.
*
* If there is a mismatch of the CRC-32 values for a ZIP entry in an input
* archive, the {@link java.io.InputStream#close} method of the corresponding
* stream for the archive entry will throw a
* {@link de.schlichtherle.truezip.zip.CRC32Exception}.
* Other than this, the archive entry will be processed normally.
* So if just the CRC-32 value for the entry in the archive file has been
* modified, you can still read its entire contents.
*
* Subclasses must be thread-safe and should be immutable!
*
* @author Christian Schlichtherle
*/
@Immutable
public class CheckedZipDriver extends ZipDriver {
public CheckedZipDriver(IOPoolProvider provider) {
super(provider);
}
/**
* {@inheritDoc}
*
* @return {@code true}
*/
@Override
protected boolean check(ZipInputShop input, ZipDriverEntry entry) {
return true;
}
}