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[polygons] refactoring methods for getting cached/non-cached polygons

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Al
2016-04-09 19:52:48 -04:00
parent e4ff4a28b1
commit 333bd7ef45
1 changed files with 20 additions and 28 deletions
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48
scripts/geodata/polygons/index.py
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@@ -62,7 +62,7 @@ class PolygonIndex(object):
self.cache_hits = 0
self.cache_misses = 0
self.polygons_contain = self.polygons_contain_cached
self.get_polygon = self.get_polygon_cached
if not polygons_db_path:
polygons_db_path = os.path.join(save_dir or '.', self.POLYGONS_DB_DIR)
@@ -277,15 +277,32 @@ class PolygonIndex(object):
def get_candidate_polygons(self, lat, lon):
raise NotImplementedError('Children must implement')
def get_properties(self, i):
return json.loads(self.polygons_db.Get(self.properties_key(i)))
def get_polygon(self, i):
return self.polygons[i]
def get_polygon_cached(self, i):
poly = self.polygons.get(i, None)
if poly is None:
data = json.loads(self.polygons_db.Get(self.polygon_key(i)))
poly = prep(self.polygon_from_geojson(data))
self.polygons[i] = poly
self.cache_misses += 1
else:
self.cache_hits += 1
return poly
def polygons_contain(self, candidates, point, return_all=False):
containing = None
if return_all:
containing = []
for i in candidates:
poly = self.polygons[i]
poly = self.get_polygon(i)
contains = poly.contains(point)
if contains:
properties = json.loads(self.polygons_db.Get(self.properties_key(i)))
properties = self.get_properties(i)
if not return_all:
return properties
else:
@@ -298,31 +315,6 @@ class PolygonIndex(object):
def properties_key(self, i):
return 'props:{}'.format(i)
def polygons_contain_cached(self, candidates, point, return_all=False):
containing = None
if return_all:
containing = []
for i in candidates:
poly = self.polygons.get(i, None)
data = {}
if poly is None:
data = json.loads(self.polygons_db.Get(self.polygon_key(i)))
poly = prep(self.polygon_from_geojson(data))
self.polygons[i] = poly
self.cache_misses += 1
else:
self.cache_hits += 1
contains = poly.contains(point)
if contains:
properties = json.loads(self.polygons_db.Get(self.properties_key(i)))
if not return_all:
return properties
else:
containing.append(properties)
return containing
def point_in_poly(self, lat, lon, return_all=False):
candidates = self.get_candidate_polygons(lat, lon)
point = Point(lon, lat)