/// <summary>
/// Does the v1 deserialization.
/// </summary>
/// <param name="stream"></param>
/// <param name="lazy"></param>
/// <param name="vehicles"></param>
/// <returns></returns>
protected override IBasicRouterDataSource <TEdgeData> DoDeserialize(
LimitedStream stream, bool lazy, IEnumerable <string> vehicles)
{
ITagsCollectionIndex tagsCollectionIndex = this.CreateTagsCollectionIndex();
DynamicGraphRouterDataSource <TEdgeData> graph = this.CreateGraph(tagsCollectionIndex);
// deserialize vertices.
var sizeBytes = new byte[8];
stream.Read(sizeBytes, 0, 8);
var position = stream.Position;
var size = BitConverter.ToInt64(sizeBytes, 0);
this.DeserializeVertices(stream, size, graph);
stream.Seek(position + size, System.IO.SeekOrigin.Begin);
// deserialize edges.
stream.Read(sizeBytes, 0, 8);
position = stream.Position;
size = BitConverter.ToInt64(sizeBytes, 0);
this.DeserializeEdges(stream, size, graph);
stream.Seek(position + size, System.IO.SeekOrigin.Begin);
// deserialize tags.
stream.Read(sizeBytes, 0, 8);
position = stream.Position;
size = BitConverter.ToInt64(sizeBytes, 0);
this.DeserializeTags(stream, size, tagsCollectionIndex);
stream.Seek(position + size, System.IO.SeekOrigin.Begin);
return(graph);
}
/// <summary>
/// Does the v2 deserialization.
/// </summary>
/// <param name="stream"></param>
/// <param name="lazy"></param>
/// <returns></returns>
protected override IBasicRouterDataSource <CHEdgeData> DoDeserialize(
LimitedStream stream, bool lazy)
{
var intBytes = new byte[4];
stream.Read(intBytes, 0, 4);
int startOfBlocks = BitConverter.ToInt32(intBytes, 0);
// deserialize regions index.
stream.Read(intBytes, 0, 4);
int sizeRegionIndex = BitConverter.ToInt32(intBytes, 0);
var chVertexRegionIndex = (CHVertexRegionIndex)_runtimeTypeModel.Deserialize(
new CappedStream(stream, stream.Position, sizeRegionIndex), null,
typeof(CHVertexRegionIndex));
// deserialize blocks index.
stream.Seek(startOfBlocks, SeekOrigin.Begin);
stream.Read(intBytes, 0, 4);
int sizeBlockIndex = BitConverter.ToInt32(intBytes, 0);
var chBlockIndex = (CHBlockIndex)_runtimeTypeModel.Deserialize(
new CappedStream(stream, stream.Position, sizeBlockIndex), null,
typeof(CHBlockIndex));
return(new CHEdgeDataDataSource(stream, this, sizeRegionIndex + 8,
chVertexRegionIndex, RegionZoom, startOfBlocks + sizeBlockIndex + 4, chBlockIndex, BlockVertexSize));
}
/// <summary>
/// Does the v2 deserialization.
/// </summary>
/// <param name="stream"></param>
/// <param name="lazy"></param>
/// <param name="vehicles"></param>
/// <returns></returns>
protected override IBasicRouterDataSource <CHEdgeData> DoDeserialize(
LimitedStream stream, bool lazy, IEnumerable <string> vehicles)
{
var intBytes = new byte[4];
stream.Read(intBytes, 0, 4);
int startOfBlocks = BitConverter.ToInt32(intBytes, 0);
stream.Read(intBytes, 0, 4);
int startOfTags = BitConverter.ToInt32(intBytes, 0);
stream.Read(intBytes, 0, 4);
int sizeRegionIndex = BitConverter.ToInt32(intBytes, 0);
// deserialize regions index.
var chVertexRegionIndex = (CHVertexRegionIndex)_runtimeTypeModel.Deserialize(
new CappedStream(stream, stream.Position, sizeRegionIndex), null,
typeof(CHVertexRegionIndex));
// deserialize blocks index.
stream.Seek(startOfBlocks, SeekOrigin.Begin);
stream.Read(intBytes, 0, 4);
int sizeBlockIndex = BitConverter.ToInt32(intBytes, 0);
var chBlockIndex = (CHBlockIndex)_runtimeTypeModel.Deserialize(
new CappedStream(stream, stream.Position, sizeBlockIndex), null,
typeof(CHBlockIndex));
// deserialize tags.
stream.Seek(startOfTags, SeekOrigin.Begin);
ITagsCollectionIndexReadonly tagsIndex = TagIndexSerializer.DeserializeBlocks(stream);
return(new v2.CHEdgeDataDataSource(stream, this, vehicles, sizeRegionIndex + 12,
chVertexRegionIndex, _regionZoom, startOfBlocks + sizeBlockIndex + 4, chBlockIndex, (uint)_blockVertexSize,
tagsIndex));
}
/// <summary>
/// Does the v1 deserialization.
/// </summary>
/// <param name="stream"></param>
/// <param name="lazy"></param>
/// <param name="vehicles"></param>
/// <returns></returns>
protected override IBasicRouterDataSource <CHEdgeData> DoDeserialize(
LimitedStream stream, bool lazy, IEnumerable <string> vehicles)
{
// serialize all tile meta data.
stream.Seek(0, SeekOrigin.Begin);
var compressionFlag = new byte[1];
stream.Read(compressionFlag, 0, 1);
bool decompress = (compressionFlag[0] == (byte)1);
var tileCountBytes = new byte[4];
stream.Read(tileCountBytes, 0, tileCountBytes.Length);
// var tileCount = BitConverter.ToInt32(tileCountBytes, 0);
var tileMetaEndBytes = new byte[8];
stream.Read(tileMetaEndBytes, 0, tileMetaEndBytes.Length);
var tileMetaEnd = BitConverter.ToInt64(tileMetaEndBytes, 0);
// deserialize meta data.
var metas = (SerializableGraphTileMetas)_runtimeTypeModel.Deserialize(
new CappedStream(stream, stream.Position, tileMetaEnd - stream.Position), null,
typeof(SerializableGraphTileMetas));
// create the datasource.
var routerDataSource = new CHEdgeDataDataSource(stream, decompress, vehicles, metas, Zoom,
this, 1000);
if (!lazy)
{
// pre-load everything.
for (int tileIdx = 0; tileIdx < metas.TileX.Length; tileIdx++)
{
routerDataSource.LoadMissingTile(
new Tile(metas.TileX[tileIdx], metas.TileY[tileIdx], Zoom));
}
}
// return router datasource.
return(routerDataSource);
}
/// <summary>
/// Deserializes the meta-data.
/// </summary>
/// <param name="stream"></param>
/// <param name="tagsCollectionIndex"></param>
/// <param name="size"></param>
protected virtual void DeserializeTags(LimitedStream stream, long size, ITagsCollectionIndex tagsCollectionIndex)
{
RuntimeTypeModel typeModel = RuntimeTypeModel.Create();
typeModel.Add(typeof(SerializableTag), true);
// read tags collection-count.
var countBytes = new byte[4];
stream.Read(countBytes, 0, 4);
int max = BitConverter.ToInt32(countBytes, 0);
// serialize tags collections one-by-one.
var currentTags = new List <SerializableTag>();
if (max > 0)
{ // keep reading until max.
currentTags.AddRange(typeModel.DeserializeWithSize(stream, null, typeof(SerializableTag[])) as SerializableTag[]);
// detect an empty collection at zero.
if (currentTags[0].CollectionId == 1)
{ // no zero, there is an empty collection.
tagsCollectionIndex.Add(new TagsCollection());
}
while (tagsCollectionIndex.Max < max)
{
// try and detect an id change.
bool idChanged = true;
while (currentTags.Count > 0 &&
idChanged)
{ // there are tags.
idChanged = false;
var tagsCollection = new TagsCollection();
int index = 0;
uint currentId = currentTags[index].CollectionId;
// detect an empty collection in between.
if (currentId > tagsCollectionIndex.Max + 1)
{ // it's possible there was an empty tag collection in there somewhere.
tagsCollectionIndex.Add(new TagsCollection());
}
tagsCollection.Add(new Tag(currentTags[index].Key, currentTags[index].Value));
index++;
while (currentTags.Count > index)
{ // test for a different id.
if (currentTags[index].CollectionId != currentId ||
currentTags[index].CollectionId == uint.MaxValue)
{ // yes! an id change was detected.
idChanged = true;
currentTags.RemoveRange(0, index);
if (tagsCollection.Count > 0)
{ // there are tags.
tagsCollectionIndex.AddObject(tagsCollection);
}
break;
}
tagsCollection.Add(new Tag(currentTags[index].Key, currentTags[index].Value));
index++;
}
}
// read next block.
currentTags.AddRange(typeModel.DeserializeWithSize(stream, null, typeof(SerializableTag[])) as SerializableTag[]);
}
}
}
