//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public synchronized org.neo4j.io.pagecache.PagedFile map(java.io.File file, int filePageSize, java.nio.file.OpenOption... openOptions) throws java.io.IOException
public override PagedFile Map(File file, int filePageSize, params OpenOption[] openOptions)
{
lock (this)
{
AssertHealthy();
EnsureThreadsInitialised();
if (filePageSize > _cachePageSize)
{
throw new System.ArgumentException("Cannot map files with a filePageSize (" + filePageSize + ") that is greater than the " + "cachePageSize (" + _cachePageSize + ")");
}
file = file.CanonicalFile;
bool createIfNotExists = false;
bool truncateExisting = false;
bool deleteOnClose = false;
bool anyPageSize = false;
bool noChannelStriping = false;
foreach (OpenOption option in openOptions)
{
if (option.Equals(StandardOpenOption.CREATE))
{
createIfNotExists = true;
}
else if (option.Equals(StandardOpenOption.TRUNCATE_EXISTING))
{
truncateExisting = true;
}
else if (option.Equals(StandardOpenOption.DELETE_ON_CLOSE))
{
deleteOnClose = true;
}
else if (option.Equals(PageCacheOpenOptions.ANY_PAGE_SIZE))
{
anyPageSize = true;
}
else if (option.Equals(PageCacheOpenOptions.NO_CHANNEL_STRIPING))
{
noChannelStriping = true;
}
else if (!_ignoredOpenOptions.Contains(option))
{
throw new System.NotSupportedException("Unsupported OpenOption: " + option);
}
}
FileMapping current = _mappedFiles;
// find an existing mapping
while (current != null)
{
if (current.File.Equals(file))
{
MuninnPagedFile pagedFile = current.PagedFile;
if (pagedFile.PageSize() != filePageSize && !anyPageSize)
{
string msg = "Cannot map file " + file + " with " +
"filePageSize " + filePageSize + " bytes, " +
"because it has already been mapped with a " +
"filePageSize of " + pagedFile.PageSize() +
" bytes.";
throw new System.ArgumentException(msg);
}
if (truncateExisting)
{
throw new System.NotSupportedException("Cannot truncate a file that is already mapped");
}
pagedFile.IncrementRefCount();
pagedFile.MarkDeleteOnClose(deleteOnClose);
return(pagedFile);
}
current = current.Next;
}
if (filePageSize < Long.BYTES)
{
throw new System.ArgumentException("Cannot map files with a filePageSize (" + filePageSize + ") that is less than " + Long.BYTES + " bytes");
}
// there was no existing mapping
MuninnPagedFile pagedFile = new MuninnPagedFile(file, this, filePageSize, _swapperFactory, _pageCacheTracer, _pageCursorTracerSupplier, _versionContextSupplier, createIfNotExists, truncateExisting, noChannelStriping);
pagedFile.IncrementRefCount();
pagedFile.MarkDeleteOnClose(deleteOnClose);
current = new FileMapping(file, pagedFile);
current.Next = _mappedFiles;
_mappedFiles = current;
_pageCacheTracer.mappedFile(file);
return(pagedFile);
}
}
