private SectionQueryCache _create_sectionquerycache(ShapeIDPairs shapeidpairs)
{
// Prepare a cache object
if (this.Count < 1)
{
return(new SectionQueryCache(0));
}
var _cache = new SectionQueryCache();
// For each shape, for each section find the number of rows
foreach (var shapeidpair in shapeidpairs)
{
// For that shape, fill in the section cache for each section that
// needs to be queried
var shapecache = new ShapeCache(this.Count);
foreach (var sec_cols in this)
{
var shapecacheitem = SectionQuery._create_shapesectioncacheitem(shapeidpair, sec_cols.SectionIndex, sec_cols);
shapecache.Add(shapecacheitem);
}
// For this shape, add the accumulated info into the cache
_cache.Add(shapecache);
}
// Ensure that we have created a cache for eash shapes
if (shapeidpairs.Count != _cache.Count)
{
string msg = string.Format("mismatch in number of shapes and information collected for shapes");
throw new Exceptions.InternalAssertionException(msg);
}
return(_cache);
}
private Streams.StreamArray _build_src_stream(SectionQueryCache cache)
{
int dummy_shapeid = -1;
int shapeindex = 0;
int numcells = cache.CountCells();
var shapecache = cache[shapeindex];
var srcs = _sidsrcs_for_shape(dummy_shapeid, shapecache).Select(i => i.Src);
var stream = Streams.StreamArray.FromSrc(numcells, srcs);
return(stream);
}
private static IEnumerable <SidSrc> _sidsrcs_for_shapes(ShapeIDPairs shapeidpairs, SectionQueryCache cache)
{
foreach (int shape_ord in Enumerable.Range(0, shapeidpairs.Count))
{
// For each shape add the cells to query
var pair = shapeidpairs[shape_ord];
var shapecache = cache[shape_ord];
var sidsrcs = _sidsrcs_for_shape(pair.ShapeID, shapecache);
foreach (var sidsrc in sidsrcs)
{
yield return(sidsrc);
}
}
}
private VASS.Streams.StreamArray _build_sidsrc_stream(ShapeIDPairs shapeidpairs, SectionQueryCache cache)
{
int numcells = cache.CountCells();
var sidsrcs = _sidsrcs_for_shapes(shapeidpairs, cache);
var stream = VASS.Streams.StreamArray.FromSidSrc(numcells, sidsrcs);
return(stream);
}
private SectionQueryResults <T> _create_outputs_for_shapes <T>(ShapeIDPairs shapeidpairs, SectionQueryCache sectioncache, VASS.Internal.ArraySegmentReader <T> segreader)
{
var results = new SectionQueryResults <T>();
for (int pair_index = 0; pair_index < shapeidpairs.Count; pair_index++)
{
var pair = shapeidpairs[pair_index];
var shapecache = sectioncache[pair_index];
var output_for_shape = this._create_output_for_shape((short)pair.ShapeID, shapecache, segreader);
results.Add(output_for_shape);
}
return(results);
}
