//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: private long[] sample(Iterable<DataFactory> dataFactories, Header.Factory headerFactory, System.Func<org.neo4j.values.storable.Value[], int> valueSizeCalculator, System.Func<org.neo4j.unsafe.impl.batchimport.input.InputEntity, int> additionalCalculator) throws java.io.IOException
private long[] Sample(IEnumerable <DataFactory> dataFactories, Header.Factory headerFactory, System.Func <Value[], int> valueSizeCalculator, System.Func <InputEntity, int> additionalCalculator)
{
long[] estimates = new long[4]; // [entity count, property count, property size, labels (for nodes only)]
using (CsvInputChunkProxy chunk = new CsvInputChunkProxy())
{
// One group of input files
int groupId = 0;
foreach (DataFactory dataFactory in dataFactories) // one input group
{
groupId++;
Header header = null;
Data data = dataFactory.Create(_config);
RawIterator <CharReadable, IOException> sources = data.Stream();
while (sources.HasNext())
{
using (CharReadable source = sources.Next())
{
if (header == null)
{
// Extract the header from the first file in this group
header = extractHeader(source, headerFactory, _idType, _config, _groups);
}
using (CsvInputIterator iterator = new CsvInputIterator(source, data.Decorator(), header, _config, _idType, EMPTY, extractors(_config), groupId), InputEntity entity = new InputEntity())
{
int entities = 0;
int properties = 0;
int propertySize = 0;
int additional = 0;
while (iterator.Position() < _estimateSampleSize && iterator.Next(chunk))
{
for ( ; chunk.Next(entity); entities++)
{
properties += entity.PropertyCount();
propertySize += calculatePropertySize(entity, valueSizeCalculator);
additional += additionalCalculator(entity);
}
}
if (entities > 0)
{
long entityCountInSource = ( long )((( double )source.Length() / iterator.Position()) * entities);
estimates[0] += entityCountInSource;
estimates[1] += ( long )((( double )properties / entities) * entityCountInSource);
estimates[2] += ( long )((( double )propertySize / entities) * entityCountInSource);
estimates[3] += ( long )((( double )additional / entities) * entityCountInSource);
}
}
}
}
}
}
return(estimates);
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public boolean next(CsvInputChunkProxy proxy) throws java.io.IOException
public virtual bool Next(CsvInputChunkProxy proxy)
{
proxy.EnsureInstantiated(_realInputChunkSupplier, _groupId);
return(proxy.FillFrom(_chunker));
}