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/*
* Copyright 2007 - 2018 ETH Zuerich, CISD and SIS.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.systemsx.cisd.hdf5.h5ar;
import java.io.File;
import java.io.IOException;
import java.util.zip.CRC32;
import hdf.hdf5lib.exceptions.HDF5Exception;
import hdf.hdf5lib.exceptions.HDF5LibraryException;
import ch.systemsx.cisd.base.exceptions.IErrorStrategy;
import ch.systemsx.cisd.base.unix.FileLinkType;
import ch.systemsx.cisd.hdf5.HDF5LinkInformation;
import ch.systemsx.cisd.hdf5.IHDF5Reader;
import hdf.hdf5lib.HDF5Constants;
/**
* An {@Link IArchiveEntryProcessor} that performs a file list.
*
* @author Bernd Rinn
*/
class ArchiveEntryListProcessor implements IArchiveEntryProcessor
{
private final IArchiveEntryVisitor visitor;
private final byte[] buffer;
private final boolean checkArchive;
ArchiveEntryListProcessor(IArchiveEntryVisitor visitor, byte[] buffer, boolean checkArchive)
{
this.visitor = visitor;
this.buffer = buffer;
this.checkArchive = checkArchive;
}
@Override
public boolean process(String dir, String path, LinkRecord link, IHDF5Reader reader,
IdCache idCache, IErrorStrategy errorStrategy) throws IOException
{
String errorMessage = null;
if (checkArchive)
{
final HDF5LinkInformation info = reader.object().getLinkInformation(path);
final FileLinkType verifiedType = Utils.translateType(info.getType());
link.setVerifiedType(verifiedType);
if (verifiedType == FileLinkType.REGULAR_FILE)
{
final long verifiedSize = reader.object().getSize(path);
int verifiedCrc32 = 0;
try
{
verifiedCrc32 = calcCRC32Archive(path, verifiedSize, reader);
} catch (HDF5Exception ex)
{
errorMessage = ex.getClass().getSimpleName() + ": " + ex.getMessage();
}
link.setFileVerification(verifiedSize, verifiedCrc32, Utils.UNKNOWN);
}
}
visitor.visit(new ArchiveEntry(dir, path, link, idCache, errorMessage));
return true;
}
@Override
public void postProcessDirectory(String dir, String path, LinkRecord link, IHDF5Reader reader,
IdCache idCache, IErrorStrategy errorStrategy) throws IOException, HDF5Exception
{
}
private int calcCRC32Archive(String objectPath, long size, IHDF5Reader hdf5Reader)
{
final CRC32 crc32Digest = new CRC32();
long offset = 0;
while (offset < size)
{
final int n =
hdf5Reader.opaque().readArrayToBlockWithOffset(objectPath, buffer, buffer.length,
offset, 0);
offset += n;
crc32Digest.update(buffer, 0, n);
}
return (int) crc32Digest.getValue();
}
@Override
public ArchiverException createException(String objectPath, String detailedMsg)
{
return new ListArchiveException(objectPath, detailedMsg);
}
@Override
public ArchiverException createException(String objectPath, HDF5Exception cause)
{
if (isTooManySymlinksError(cause))
{
return new ListArchiveTooManySymbolicLinksException(objectPath, cause);
}
return new ListArchiveException(objectPath, cause);
}
private boolean isTooManySymlinksError(HDF5Exception cause)
{
if (cause instanceof HDF5LibraryException == false)
{
return false;
}
final HDF5LibraryException libCause = (HDF5LibraryException) cause;
final String msg = libCause.getMessage();
return (libCause.getMajorErrorNumber() == HDF5Constants.H5E_LINK && msg != null
&& msg.startsWith("Too many soft links in path"));
}
@Override
public ArchiverException createException(String objectPath, RuntimeException cause)
{
return new ListArchiveException(objectPath, cause);
}
@Override
public ArchiverException createException(File file, IOException cause)
{
return new ListArchiveException(file, cause);
}
}
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