/// <summary>
/// Select record format for the given store directory.
/// <para>
/// <b>Note:</b> package private only for testing.
///
/// </para>
/// </summary>
/// <param name="databaseLayout"> directory with the store </param>
/// <param name="fs"> file system used to access store files </param>
/// <param name="pageCache"> page cache to read store files </param>
/// <returns> record format of the given store or <code>null</code> if <seealso cref="DatabaseLayout.metadataStore()"/> file not
/// found or can't be read </returns>
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Nullable static RecordFormats selectForStore(org.neo4j.io.layout.DatabaseLayout databaseLayout, org.neo4j.io.fs.FileSystemAbstraction fs, org.neo4j.io.pagecache.PageCache pageCache, org.neo4j.logging.LogProvider logProvider)
internal static RecordFormats SelectForStore(DatabaseLayout databaseLayout, FileSystemAbstraction fs, PageCache pageCache, LogProvider logProvider)
{
File neoStoreFile = databaseLayout.MetadataStore();
if (fs.FileExists(neoStoreFile))
{
try
{
long value = MetaDataStore.getRecord(pageCache, neoStoreFile, STORE_VERSION);
if (value != MetaDataRecordFormat.FIELD_NOT_PRESENT)
{
string storeVersion = MetaDataStore.versionLongToString(value);
foreach (RecordFormats format in AllFormats())
{
if (format.StoreVersion().Equals(storeVersion))
{
Info(logProvider, "Selected " + format + " record format from store " + databaseLayout.DatabaseDirectory());
return(format);
}
}
}
}
catch (IOException e)
{
Info(logProvider, "Unable to read store format: " + e.Message);
}
}
return(null);
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public java.util.Optional<String> getVersion(java.io.File neostoreFile) throws java.io.IOException
public virtual Optional <string> GetVersion(File neostoreFile)
{
long record = MetaDataStore.getRecord(_pageCache, neostoreFile, STORE_VERSION);
if (record == MetaDataRecordFormat.FIELD_NOT_PRESENT)
{
return(null);
}
return(MetaDataStore.versionLongToString(record));
}