/// <summary>
/// Creates an PbfMetadata obejct from given Metadata.
/// </summary>
/// <param name="metadata">Metadata obejct to be used as source of data.</param>
/// <param name="timestampGranularity">Timestamp granularity as defined in PrimitiveBlock.</param>
/// <param name="stringTableBuilder">IStrignTable object to save string values to.</param>
/// <returns>PbfMetadata obejct with data from specified metadata object.</returns>
private PbfMetadata BuildInfo(EntityMetadata metadata, int timestampGranularity, IStringTableBuilder stringTableBuilder)
{
PbfMetadata result = new PbfMetadata();
result.Changeset = metadata.Changeset;
result.Timestamp = (long)Math.Round((metadata.Timestamp - _unixEpoch).TotalMilliseconds / timestampGranularity);
result.UserID = metadata.Uid;
result.UserNameIndex = (int)stringTableBuilder.GetStringIndex(metadata.User);
result.Version = metadata.Version;
return result;
}
/// <summary>
/// Processes entity metadata.
/// </summary>
/// <param name="serializedMetadata">Serilized metadata.</param>
/// <param name="block">PrimitiveBlock that contains metadata being processed.</param>
/// <returns>Parsed metadata.</returns>
private EntityMetadata ProcessMetadata(PbfMetadata serializedMetadata, PrimitiveBlock block)
{
EntityMetadata metadata = null;
if (this.Settings.ReadMetadata && serializedMetadata != null) {
//PBF has no field for 'visible' property, true is default value for OSM entity read from PBF file
metadata = new EntityMetadata() { Visible = true };
if (serializedMetadata.Changeset.HasValue) {
metadata.Changeset = (int)serializedMetadata.Changeset.Value;
}
if (serializedMetadata.Timestamp.HasValue) {
metadata.Timestamp = _unixEpoch.AddMilliseconds(serializedMetadata.Timestamp.Value * block.DateGranularity);
}
if (serializedMetadata.UserID.HasValue) {
metadata.Uid = serializedMetadata.UserID.Value;
}
if (serializedMetadata.UserNameIndex.HasValue) {
metadata.User = block.StringTable[serializedMetadata.UserNameIndex.Value];
}
if (serializedMetadata.Version.HasValue) {
metadata.Version = serializedMetadata.Version.Value;
}
}
return metadata;
}