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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 ch.systemsx.cisd.base.exceptions.IErrorStrategy;
import ch.systemsx.cisd.base.exceptions.IOExceptionUnchecked;
/**
* A class to update the {@link DirectoryIndex} from files on the filesystem.
*
* @author Bernd Rinn
*/
final class DirectoryIndexUpdater
{
private final IDirectoryIndexProvider indexProvider;
private final IErrorStrategy errorStrategy;
DirectoryIndexUpdater(IDirectoryIndexProvider indexProvider)
{
this.indexProvider = indexProvider;
this.errorStrategy = indexProvider.getErrorStrategy();
}
void updateIndicesOnThePath(String rootDir, File path, int crc32, boolean immediateGroupOnly)
throws IOExceptionUnchecked
{
String groupPath =
rootDir.endsWith("/") ? rootDir.substring(0, rootDir.length() - 1) : rootDir;
final IDirectoryIndex index = indexProvider.get(groupPath, false);
final LinkRecord linkOrNull = LinkRecord.tryCreate(path, errorStrategy);
if (linkOrNull == null)
{
throw new IOExceptionUnchecked("Cannot get link information for path '" + path + "'.");
}
linkOrNull.setCrc32(crc32);
index.updateIndex(linkOrNull);
if (immediateGroupOnly == false)
{
final String pathPrefixOnFSOrNull = tryGetPathPrefix(groupPath, path.getAbsolutePath());
String groupName = Utils.getName(groupPath);
groupPath = Utils.getParentPath(groupPath);
while (groupName.length() > 0)
{
updateIndex(pathPrefixOnFSOrNull, groupPath, groupName);
groupName = Utils.getName(groupPath);
groupPath = Utils.getParentPath(groupPath);
}
}
}
private void updateIndex(String pathPrefixOnFSOrNull, String groupPath, String groupName)
{
final IDirectoryIndex index = indexProvider.get(groupPath, false);
if (pathPrefixOnFSOrNull == null)
{
index.updateIndex(new LinkRecord(groupName));
} else
{
final File groupPathFile = new File(pathPrefixOnFSOrNull, groupName);
index.updateIndex(LinkRecord.tryCreate(groupPathFile, errorStrategy));
}
}
private String tryGetPathPrefix(String root, String filePath)
{
final String parentPath = Utils.getParentPath(filePath);
if (parentPath.endsWith(root) == false)
{
return null;
}
final String pathPrefix = parentPath.substring(0, parentPath.length() - root.length());
if (pathPrefix.length() == 0)
{
return "/";
} else
{
return pathPrefix;
}
}
}
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