public static (long AttributeId, bool IsNew) OpenOrCreateAttribute(long locationId, string name, long attributeTypeId, ulong length, ulong[] dimensionLimitSet)
{
return(IOHelper.OpenOrCreateAttribute(locationId, name, attributeTypeId, () =>
{
long dataspaceId = -1;
long attributeId = -1;
try
{
dataspaceId = H5S.create_simple(1, new ulong[] { length }, dimensionLimitSet);
attributeId = H5A.create(locationId, name, attributeTypeId, dataspaceId);
if (H5I.is_valid(attributeId) <= 0)
{
throw new Exception(ErrorMessage.IOHelper_CouldNotOpenOrCreateAttribute);
}
}
finally
{
if (H5I.is_valid(dataspaceId) > 0)
{
H5S.close(dataspaceId);
}
}
return attributeId;
}));
}
public static void PrepareAttribute <T>(long locationId, string name, T[] valueSet, ulong[] dimensionLimitSet, bool initializeAttribute, [CallerMemberName()] string callerMemberName = "")
{
Contract.Requires(valueSet != null, nameof(valueSet));
long fileId = -1;
long typeId = -1;
long attributeId = -1;
ulong[] dimensionSet;
bool isNew;
Type elementType;
dimensionSet = new ulong[] { 0 };
elementType = typeof(T);
try
{
fileId = H5I.get_file_id(locationId);
// create attribute
typeId = TypeConversionHelper.GetHdfTypeIdFromType(fileId, elementType);
(attributeId, isNew) = IOHelper.OpenOrCreateAttribute(locationId, name, typeId, (ulong)valueSet.LongLength, dimensionLimitSet);
// write attribute data (regenerate attribute if necessary)
if (initializeAttribute)
{
ulong[] oldValueSetCount;
if (!isNew && callerMemberName != nameof(IOHelper.PrepareAttribute))
{
oldValueSetCount = IOHelper.PrepareAttributeValueSet(attributeId, ref valueSet, false);
}
else
{
oldValueSetCount = new ulong[1] {
(ulong)valueSet.Count()
}
};
if (valueSet.Count() == (int)oldValueSetCount[0])
{
IOHelper.Write(attributeId, valueSet, DataContainerType.Attribute);
}
else
{
H5A.close(attributeId);
H5A.delete(locationId, name);
IOHelper.PrepareAttribute(locationId, name, valueSet, dimensionLimitSet, true);
}
}
}
finally
{
if (H5I.is_valid(attributeId) > 0)
{
H5A.close(attributeId);
}
if (H5I.is_valid(typeId) > 0)
{
H5T.close(typeId);
}
if (H5I.is_valid(fileId) > 0)
{
H5F.close(fileId);
}
}
}
