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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.util.HashMap;
import java.util.Map;
import ch.systemsx.cisd.base.exceptions.IErrorStrategy;
import ch.systemsx.cisd.base.exceptions.IOExceptionUnchecked;
import ch.systemsx.cisd.hdf5.IHDF5Reader;
/**
* A provider for {@link DirectoryIndex} objects.
*
* @author Bernd Rinn
*/
class DirectoryIndexProvider implements IDirectoryIndexProvider
{
private final Map<String, DirectoryIndex> cacheMap = new HashMap<String, DirectoryIndex>();
private final IHDF5Reader reader;
private final IErrorStrategy errorStrategy;
DirectoryIndexProvider(IHDF5Reader reader, IErrorStrategy errorStrategy)
{
this.reader = reader;
this.errorStrategy = errorStrategy;
}
@Override
public synchronized IDirectoryIndex get(String normalizedGroupPath, boolean withLinkTargets)
{
final String nonEmptyGroupPath =
(normalizedGroupPath.length() == 0) ? "/" : normalizedGroupPath;
DirectoryIndex index = cacheMap.get(nonEmptyGroupPath);
if (index == null)
{
index = new DirectoryIndex(reader, nonEmptyGroupPath, errorStrategy, withLinkTargets);
cacheMap.put(nonEmptyGroupPath, index);
} else if (withLinkTargets)
{
index.amendLinkTargets();
}
return index;
}
@Override
public IErrorStrategy getErrorStrategy()
{
return errorStrategy;
}
@Override
public synchronized void close() throws IOExceptionUnchecked
{
IOExceptionUnchecked exeptionOrNull = null;
for (DirectoryIndex index : cacheMap.values())
{
try
{
index.close();
} catch (IOExceptionUnchecked ex)
{
if (exeptionOrNull == null)
{
exeptionOrNull = ex;
}
}
}
if (exeptionOrNull != null)
{
throw exeptionOrNull;
}
}
}
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