/// <summary>
/// Converts a PBF way into an OsmSharp-relation.
/// </summary>
public static OsmSharp.Relation DecodeRelation(PrimitiveBlock block, OsmSharp.IO.PBF.Relation pbfRelation,
OsmSharp.Relation relation)
{
// make sure old data is gone.
if (relation.Members != null &&
relation.Members.Length > 0)
{ // clear members.
relation.Members = new RelationMember[pbfRelation.memids.Count];
}
if (relation.Tags != null)
{ // clear the tags collection.
relation.Tags.Clear();
}
if (relation.Members == null)
{ // clear members.
relation.Members = new RelationMember[pbfRelation.memids.Count];
}
if (relation.Tags == null)
{ // create tags collection.
relation.Tags = new TagsCollection(pbfRelation.keys.Count);
}
// add nex stuff.
relation.Id = pbfRelation.id;
long memberId = 0;
for (var i = 0; i < pbfRelation.types.Count; i++)
{
memberId = memberId + pbfRelation.memids[i];
var role = System.Text.Encoding.UTF8.GetString(
block.stringtable.s[pbfRelation.roles_sid[i]]);
var member = new OsmSharp.RelationMember();
member.Id = memberId;
member.Role = role;
switch (pbfRelation.types[i])
{
case Relation.MemberType.NODE:
member.Type = OsmSharp.OsmGeoType.Node;
break;
case Relation.MemberType.WAY:
member.Type = OsmSharp.OsmGeoType.Way;
break;
case Relation.MemberType.RELATION:
member.Type = OsmSharp.OsmGeoType.Relation;
break;
}
relation.Members[i] = member;
}
for (int i = 0; i < pbfRelation.keys.Count; i++)
{
string key = System.Text.Encoding.UTF8.GetString(block.stringtable.s[(int)pbfRelation.keys[i]]);
string value = System.Text.Encoding.UTF8.GetString(block.stringtable.s[(int)pbfRelation.vals[i]]);
relation.Tags.Add(new Tag(key, value));
}
if (pbfRelation.info != null)
{ // read metadata if any.
relation.ChangeSetId = pbfRelation.info.changeset;
relation.TimeStamp = Encoder.DecodeTimestamp(pbfRelation.info.timestamp, block.date_granularity);
relation.UserId = pbfRelation.info.uid;
relation.UserName = null;
if (block.stringtable != null)
{
relation.UserName = System.Text.Encoding.UTF8.GetString(block.stringtable.s[pbfRelation.info.user_sid]);
}
relation.Version = pbfRelation.info.version;
}
relation.Visible = true;
return(relation);
}
/// <summary>
/// Encodes an OsmSharp-relation into a PBF-relation.
/// </summary>
/// <returns></returns>
public static OsmSharp.IO.PBF.Relation EncodeRelation(PrimitiveBlock block, Dictionary <string, int> reverseStringTable, OsmSharp.Relation relation)
{
var pbfRelation = new OsmSharp.IO.PBF.Relation();
pbfRelation.id = relation.Id.Value;
pbfRelation.info = new Info();
if (relation.ChangeSetId.HasValue)
{
pbfRelation.info.changeset = relation.ChangeSetId.Value;
}
if (relation.TimeStamp.HasValue)
{
pbfRelation.info.timestamp = Encoder.EncodeTimestamp(relation.TimeStamp.Value, block.date_granularity);
}
if (relation.UserId.HasValue)
{
pbfRelation.info.uid = (int)relation.UserId.Value;
}
pbfRelation.info.user_sid = Encoder.EncodeString(block, reverseStringTable, relation.UserName);
pbfRelation.info.version = 0;
if (relation.Version.HasValue)
{
pbfRelation.info.version = (int)relation.Version.Value;
}
if (relation.Tags != null)
{
foreach (var tag in relation.Tags)
{
pbfRelation.keys.Add((uint)Encoder.EncodeString(block, reverseStringTable, tag.Key));
pbfRelation.vals.Add((uint)Encoder.EncodeString(block, reverseStringTable, tag.Value));
}
}
if (relation.Members != null &&
relation.Members.Length > 0)
{
pbfRelation.memids.Add(relation.Members[0].Id);
pbfRelation.roles_sid.Add(Encoder.EncodeString(block, reverseStringTable, relation.Members[0].Role));
switch (relation.Members[0].Type)
{
case OsmGeoType.Node:
pbfRelation.types.Add(Relation.MemberType.NODE);
break;
case OsmGeoType.Way:
pbfRelation.types.Add(Relation.MemberType.WAY);
break;
case OsmGeoType.Relation:
pbfRelation.types.Add(Relation.MemberType.RELATION);
break;
}
for (var i = 1; i < relation.Members.Length; i++)
{
pbfRelation.memids.Add(relation.Members[i].Id -
relation.Members[i - 1].Id);
pbfRelation.roles_sid.Add(Encoder.EncodeString(block, reverseStringTable, relation.Members[i].Role));
switch (relation.Members[i].Type)
{
case OsmGeoType.Node:
pbfRelation.types.Add(Relation.MemberType.NODE);
break;
case OsmGeoType.Way:
pbfRelation.types.Add(Relation.MemberType.WAY);
break;
case OsmGeoType.Relation:
pbfRelation.types.Add(Relation.MemberType.RELATION);
break;
}
}
}
return(pbfRelation);
}
/// <summary>
/// Encodes the nodes into the given block.
/// </summary>
public static void Encode(this PrimitiveBlock block, Dictionary <string, int> reverseStringTable, List <OsmGeo> osmGeos)
{
var groupIdx = 0;
var i = 0;
var nodeCount = 0;
if (block.stringtable != null &&
block.stringtable.s != null)
{
block.stringtable.s.Clear();
}
while (i < osmGeos.Count)
{
PrimitiveGroup group = null;
if (groupIdx < block.primitivegroup.Count)
{ // get the existing group and clear it's data.
group = block.primitivegroup[groupIdx];
if (group == null)
{
group = new PrimitiveGroup();
}
if (group.dense != null)
{
if (group.dense.denseinfo != null)
{
if (group.dense.denseinfo.changeset != null)
{
group.dense.denseinfo.changeset.Clear();
}
if (group.dense.denseinfo.timestamp != null)
{
group.dense.denseinfo.timestamp.Clear();
}
if (group.dense.denseinfo.uid != null)
{
group.dense.denseinfo.uid.Clear();
}
if (group.dense.denseinfo.user_sid != null)
{
group.dense.denseinfo.user_sid.Clear();
}
if (group.dense.denseinfo.version != null)
{
group.dense.denseinfo.version.Clear();
}
}
if (group.dense.id != null)
{
group.dense.id.Clear();
}
if (group.dense.keys_vals != null)
{
group.dense.keys_vals.Clear();
}
if (group.dense.lat != null)
{
group.dense.lat.Clear();
}
if (group.dense.lon != null)
{
group.dense.lon.Clear();
}
}
if (group.changesets != null)
{
group.changesets.Clear();
}
//if (group.nodes != null) { group.nodes.Clear(); }
if (group.ways != null)
{
group.ways.Clear();
}
if (group.relations != null)
{
group.relations.Clear();
}
}
else
{ // add a new group.
group = new PrimitiveGroup();
block.primitivegroup.Add(group);
}
// build group.
var groupType = osmGeos[i].Type;
var current = osmGeos[i];
while (i < osmGeos.Count &&
osmGeos[i].Type == groupType)
{
switch (groupType)
{
case OsmGeoType.Node:
if (group.nodes.Count > nodeCount)
{ // overwrite existing.
Encoder.EncodeNode(block, reverseStringTable, group.nodes[nodeCount], osmGeos[i] as OsmSharp.Node);
}
else
{ // write new.
group.nodes.Add(Encoder.EncodeNode(block, reverseStringTable, osmGeos[i] as OsmSharp.Node));
}
nodeCount++;
break;
case OsmGeoType.Way:
group.ways.Add(Encoder.EncodeWay(block, reverseStringTable, osmGeos[i] as OsmSharp.Way));
break;
case OsmGeoType.Relation:
group.relations.Add(Encoder.EncodeRelation(block, reverseStringTable, osmGeos[i] as OsmSharp.Relation));
break;
}
i++;
}
// remove obsolete nodes.
if (group.nodes != null)
{
while (nodeCount < group.nodes.Count)
{
group.nodes.RemoveAt(nodeCount);
}
}
// move to the next group.
groupIdx++;
}
while (groupIdx < block.primitivegroup.Count)
{
block.primitivegroup.RemoveAt(groupIdx);
}
}
