def get(self, nodeid):
"Retrieve the ways associated with a node."
elem = self.datastore.fetch(C.NODE, nodeid)
if elem is None:
raise tornado.web.HTTPError(404)
osm = new_osm_response()
wayset = filter_references(C.WAY, [elem])
if len(wayset) > 0:
ways = self.datastore.fetch_keys(C.WAY,
[w for w in wayset])
for (st,w) in ways:
if st:
w.build_response(osm)
self.set_header(C.CONTENT_TYPE, C.TEXT_XML)
self.write(response_to_xml(osm))
def get(self, namespace, ident):
"""Retrieve relations for an element.
The element can be a 'node' or 'way'.
"""
if namespace not in [C.NODE, C.WAY, C.RELATION]:
raise tornado.web.HTTPError(500)
elem = self.datastore.fetch(namespace, ident)
osm = new_osm_response()
if elem:
relset = filter_references(C.RELATION, [elem])
if len(relset) > 0:
relations = self.datastore.fetch_keys(C.RELATION,
[r for r in relset])
for (st,r) in relations:
if st:
r.build_response(osm)
self.set_header(C.CONTENT_TYPE, C.TEXT_XML)
self.write(response_to_xml(osm))
def handle_map(self, bbox):
"""Implementation of the /map API.
Parameters:
bbox -- Bounding box coordinates.
"""
nodelist = []
relations = []
ways = []
# This implementation follows the current implementation of
# the API server at api.openstreetmap.org (the 'rails' port).
# Look up the geo coded documents covering the desired bbox.
gckeys = self.get_geocodes(bbox)
geodocs = self.datastore.fetch_keys(C.GEODOC, gckeys)
# Step 1: Get the list of nodes contained in the given
# bounding box.
nodeset = _filter_in_bbox(bbox,
[gd for (st, gd) in geodocs if st])
if len(nodeset) == 0:
return (nodelist, ways, relations)
nodelist = [z for (st, z) in self.datastore.fetch_keys(
C.NODE, [n for n in nodeset]) if st]
# Step 2: Retrieve all ways that reference at least one node
# in the given bounding box.
wayset = filter_references(C.WAY, nodelist)
# Step 3: Retrieve any additional nodes referenced by the ways
# retrieved.
waynodeset = set()
for (st,w) in self.datastore.fetch_keys(C.WAY, [w for w in wayset]):
if st:
ways.append(w)
waynodeset.update(w.get_node_ids())
extranodeset = waynodeset - nodeset
nodelist.extend([n for (st,n) in
self.datastore.fetch_keys(C.NODE,
[n for n in extranodeset])
if st])
nodeset = nodeset | extranodeset
# Step 4: Retrieve the relations associated with these nodes.
# ... all relations that reference nodes being returned.
relset = filter_references(C.RELATION, nodelist)
# ... and relations that reference one of the ways in the wayset.
relset.update(filter_references(C.RELATION, ways))
# ... retrieve relations from the data store.
relations = [xr for (st,xr) in
self.datastore.fetch_keys(C.RELATION,
[r for r in relset])
if st]
# ... and relations referenced by existing relations
# (one-pass only).
extrarelset = filter_references(C.RELATION, relations)
newrelset = extrarelset - relset
newrels = [nr for (st, nr) in
self.datastore.fetch_keys(C.RELATION,
[r for r in newrelset])
if st]
relations.extend(newrels)
return (nodelist, ways, relations)
def handle_map(self, bbox):
"""Implementation of the /map API.
Parameters:
bbox -- Bounding box coordinates.
"""
nodelist = []
relations = []
ways = []
# This implementation follows the current implementation of
# the API server at api.openstreetmap.org (the 'rails' port).
# Look up the geo coded documents covering the desired bbox.
gckeys = self.get_geocodes(bbox)
geodocs = self.datastore.fetch_keys(C.GEODOC, gckeys)
# Step 1: Get the list of nodes contained in the given
# bounding box.
nodeset = _filter_in_bbox(bbox, [gd for (st, gd) in geodocs if st])
if len(nodeset) == 0:
return (nodelist, ways, relations)
nodelist = [
z
for (st,
z) in self.datastore.fetch_keys(C.NODE, [n for n in nodeset])
if st
]
# Step 2: Retrieve all ways that reference at least one node
# in the given bounding box.
wayset = filter_references(C.WAY, nodelist)
# Step 3: Retrieve any additional nodes referenced by the ways
# retrieved.
waynodeset = set()
for (st, w) in self.datastore.fetch_keys(C.WAY, [w for w in wayset]):
if st:
ways.append(w)
waynodeset.update(w.get_node_ids())
extranodeset = waynodeset - nodeset
nodelist.extend([
n for (st, n) in self.datastore.fetch_keys(
C.NODE, [n for n in extranodeset]) if st
])
nodeset = nodeset | extranodeset
# Step 4: Retrieve the relations associated with these nodes.
# ... all relations that reference nodes being returned.
relset = filter_references(C.RELATION, nodelist)
# ... and relations that reference one of the ways in the wayset.
relset.update(filter_references(C.RELATION, ways))
# ... retrieve relations from the data store.
relations = [
xr for (st, xr) in self.datastore.fetch_keys(
C.RELATION, [r for r in relset]) if st
]
# ... and relations referenced by existing relations
# (one-pass only).
extrarelset = filter_references(C.RELATION, relations)
newrelset = extrarelset - relset
newrels = [
nr for (st, nr) in self.datastore.fetch_keys(
C.RELATION, [r for r in newrelset]) if st
]
relations.extend(newrels)
return (nodelist, ways, relations)
