def recursive_lookup(collection, suffix, used_ids, subsets):
# get all EO objects related to this collection, excluding
# those already searched
eo_objects = models.EOObject.objects.filter(
collections__in=[collection.pk]).exclude(
pk__in=used_ids).order_by("begin_time", "end_time")
# apply subsets
eo_objects = subsets.filter(eo_objects)
selection = LayerSelection()
# append all retrived EO objects, either as a coverage of
# the real type, or as a subgroup.
for eo_object in eo_objects:
used_ids.add(eo_object.pk)
if models.iscoverage(eo_object):
selection.append(eo_object.cast(),
eo_object.identifier)
elif models.iscollection(eo_object):
selection.extend(
recursive_lookup(eo_object, suffix, used_ids,
subsets))
else:
pass
return selection
def recursive_lookup(collection, suffix, used_ids, subsets):
# get all EO objects related to this collection, excluding
# those already searched
eo_objects = models.EOObject.objects.filter(
collections__in=[collection.pk]
).exclude(
pk__in=used_ids
).order_by("begin_time", "end_time")
# apply subsets
eo_objects = subsets.filter(eo_objects)
selection = LayerSelection()
# append all retrived EO objects, either as a coverage of
# the real type, or as a subgroup.
for eo_object in eo_objects:
used_ids.add(eo_object.pk)
if models.iscoverage(eo_object):
selection.append(eo_object.cast(), eo_object.identifier)
elif models.iscollection(eo_object):
selection.extend(recursive_lookup(
eo_object, suffix, used_ids, subsets
))
else:
pass
return selection
def print_object(self, eo_object, recursive=False, level=0):
indent = INDENT * level
eo_object = eo_object.cast()
print("%s%s %s" % (indent, eo_object.identifier,
eo_object.__class__.__name__))
if recursive and models.iscollection(eo_object):
for sub_eo_object in eo_object.eo_objects.all():
self.print_object(sub_eo_object, recursive, level+1)
def execute(collection, begin_time, end_time, **kwarg):
""" The main execution function for the process.
"""
# get the dataset series matching the requested ID
try:
model = models.EOObject.objects.get(identifier=collection)
except models.EOObject.DoesNotExist:
raise InvalidInputValueError(
"collection", "Invalid collection name '%s'!" % collection
)
if models.iscollection(model):
model = model.cast()
# recursive dataset series lookup
def _get_children_ids(ds):
ds_rct = ds.real_content_type
id_list = [ds.id]
for child in model.eo_objects.filter(real_content_type=ds_rct):
id_list.extend(_get_children_ids(child))
return id_list
collection_ids = _get_children_ids(model)
# prepare coverage query set
coverages_qs = models.Coverage.objects.filter(
collections__id__in=collection_ids
)
if end_time is not None:
coverages_qs = coverages_qs.filter(begin_time__lte=end_time)
if begin_time is not None:
coverages_qs = coverages_qs.filter(end_time__gte=begin_time)
coverages_qs = coverages_qs.order_by('begin_time', 'end_time')
coverages_qs = coverages_qs.values_list("begin_time", "end_time", "identifier", "min_x", "min_y", "max_x", "max_y")
else:
min_x, min_y, max_x, max_y = model.extent_wgs84
coverages_qs = ((model.begin_time, model.end_time, model.identifier, min_x, min_y, max_x, max_y),)
# create the output
output = CDAsciiTextBuffer()
writer = csv.writer(output, quoting=csv.QUOTE_ALL)
header = ["starttime", "endtime", "bbox", "identifier"]
writer.writerow(header)
for starttime, endtime, identifier, min_x, min_y, max_x, max_y in coverages_qs:
bbox = (min_x, min_y, max_x, max_y)
writer.writerow([isoformat(starttime), isoformat(endtime), bbox, identifier])
return output
def execute(collection, begin_time, end_time, **kwarg):
""" The main execution function for the process.
"""
# get the dataset series matching the requested ID
try:
model = models.EOObject.objects.get(identifier=collection)
except models.EOObject.DoesNotExist:
raise InvalidInputValueError(
"collection", "Invalid collection name '%s'!" % collection
)
if models.iscollection(model):
model = model.cast()
# recursive dataset series lookup
def _get_children_ids(ds):
ds_rct = ds.real_content_type
id_list = [ds.id]
for child in model.eo_objects.filter(real_content_type=ds_rct):
id_list.extend(_get_children_ids(child))
return id_list
collection_ids = _get_children_ids(model)
# prepare coverage query set
coverages_qs = models.Coverage.objects.filter(
collections__id__in=collection_ids
)
if end_time is not None:
coverages_qs = coverages_qs.filter(begin_time__lte=end_time)
if begin_time is not None:
coverages_qs = coverages_qs.filter(end_time__gte=begin_time)
coverages_qs = coverages_qs.order_by('begin_time', 'end_time')
coverages_qs = coverages_qs.envelope()
coverages_qs = coverages_qs.values_list("begin_time", "end_time", "identifier", "envelope")
else:
coverages_qs = ((model.begin_time, model.end_time, model.identifier, model.footprint),)
# create the output
output = CDAsciiTextBuffer()
writer = csv.writer(output, quoting=csv.QUOTE_ALL)
header = ["starttime", "endtime", "bbox", "identifier"]
writer.writerow(header)
for starttime, endtime, identifier, bbox in coverages_qs:
writer.writerow([isoformat(starttime), isoformat(endtime), bbox.extent, identifier])
return output
def print_object(self, eo_object, recursive=False, suppress_type=False,
level=0):
indent = INDENT * level
eo_object = eo_object.cast()
if not suppress_type:
print("%s%s %s" % (indent, eo_object.identifier,
eo_object.__class__.__name__))
else:
print("%s%s" % (indent, eo_object.identifier))
if recursive and models.iscollection(eo_object):
for sub_eo_object in eo_object.eo_objects.all():
self.print_object(
sub_eo_object, recursive, suppress_type, level+1
)
def _recursive_lookup(collection):
""" Search recursively through the nested collections
and find the relevant EOObjects."""
eo_objects = subsets.filter(models.EOObject.objects\
.filter(collections__in=[collection.pk])\
.exclude(pk__in=used_ids)\
.order_by("begin_time", "end_time", "identifier")\
.prefetch_related('metadata_items'))
for eo_object in eo_objects:
used_ids.add(eo_object.pk)
if models.iscoverage(eo_object):
selection.append(eo_object.cast(), _get_alias(eo_object))
elif models.iscollection(eo_object):
_recursive_lookup(eo_object)
else:
pass # TODO: Reporting of invalid EOObjects (?)
def recursive_lookup(collection, used_ids, suffix):
eo_objects = models.EOObject.objects.filter(
collections__in=[collection.pk]
).exclude(
pk__in=used_ids
)
result = []
for eo_object in eo_objects:
used_ids.add(eo_object.pk)
if models.iscoverage(eo_object):
result.append((eo_object.cast(), suffix))
elif models.iscollection(eo_object):
result.extend(
recursive_lookup(eo_object, used_ids, suffix)
)
else:
pass
return result
def recursive_lookup(collection, used_ids, suffix):
eo_objects = models.EOObject.objects.filter(
collections__in=[collection.pk]
).exclude(
pk__in=used_ids
)
result = []
for eo_object in eo_objects:
used_ids.add(eo_object.pk)
if models.iscoverage(eo_object):
result.append((eo_object.cast(), suffix))
elif models.iscollection(eo_object):
result.extend(
recursive_lookup(eo_object, used_ids, suffix)
)
else:
pass
return result
def configuration(request):
collections = models.Collection.objects.all()
coverages = filter(
lambda c: not models.iscollection(c),
models.Coverage.objects.filter(
visible=True, collections__isnull=True
)
)
all_objects = list(chain(collections, coverages))
start_time = min(o.begin_time for o in all_objects)
end_time = max(o.end_time for o in all_objects)
return render_to_response(
'webclient/config.json', {
"layers": all_objects,
"start_time_full": isoformat(start_time - timedelta(days=5)),
"end_time_full": isoformat(end_time + timedelta(days=5)),
"start_time": isoformat(start_time),
"end_time": isoformat(end_time)
},
context_instance=RequestContext(request)
)
def lookup_layers(layers, subsets, suffixes=None):
""" Performs a layer lookup for the given layer names. Applies the given
subsets and looks up all layers with the given suffixes. Returns a
hierarchy of ``LayerSelection`` objects.
"""
suffix_related_ids = {}
root_group = LayerSelection(None)
suffixes = suffixes or (None, )
logger.debug(str(suffixes))
for layer_name in layers:
for suffix in suffixes:
if not suffix:
identifier = layer_name
elif layer_name.endswith(suffix):
identifier = layer_name[:-len(suffix)]
else:
continue
# TODO: nasty, nasty bug... dunno where
eo_objects = models.EOObject.objects.filter(identifier=identifier)
if len(eo_objects):
eo_object = eo_objects[0]
break
else:
raise LayerNotDefined(layer_name)
if models.iscollection(eo_object):
# recursively iterate over all sub-collections and collect all
# coverages
used_ids = suffix_related_ids.setdefault(suffix, set())
def recursive_lookup(collection, suffix, used_ids, subsets):
# get all EO objects related to this collection, excluding
# those already searched
eo_objects = models.EOObject.objects.filter(
collections__in=[collection.pk]).exclude(
pk__in=used_ids).order_by("begin_time", "end_time")
# apply subsets
eo_objects = subsets.filter(eo_objects)
selection = LayerSelection()
# append all retrived EO objects, either as a coverage of
# the real type, or as a subgroup.
for eo_object in eo_objects:
used_ids.add(eo_object.pk)
if models.iscoverage(eo_object):
selection.append(eo_object.cast(),
eo_object.identifier)
elif models.iscollection(eo_object):
selection.extend(
recursive_lookup(eo_object, suffix, used_ids,
subsets))
else:
pass
return selection
root_group.append(
LayerSelection(
eo_object, suffix,
recursive_lookup(eo_object, suffix, used_ids, subsets)))
elif models.iscoverage(eo_object):
# Add a layer selection for the coverage with the suffix
selection = LayerSelection(None, suffix=suffix)
if subsets.matches(eo_object):
selection.append(eo_object.cast(), eo_object.identifier)
else:
selection.append(None, eo_object.identifier)
root_group.append(selection)
return root_group
def lookup_layers(layers, subsets, suffixes=None):
""" Performs a layer lookup for the given layer names. Applies the given
subsets and looks up all layers with the given suffixes. Returns a
hierarchy of ``LayerSelection`` objects.
"""
suffix_related_ids = {}
root_group = LayerSelection(None)
suffixes = suffixes or (None,)
logger.debug(str(suffixes))
for layer_name in layers:
for suffix in suffixes:
if not suffix:
identifier = layer_name
elif layer_name.endswith(suffix):
identifier = layer_name[:-len(suffix)]
else:
continue
# TODO: nasty, nasty bug... dunno where
eo_objects = models.EOObject.objects.filter(
identifier=identifier
)
if len(eo_objects):
eo_object = eo_objects[0]
break
else:
raise LayerNotDefined(layer_name)
if models.iscollection(eo_object):
# recursively iterate over all sub-collections and collect all
# coverages
used_ids = suffix_related_ids.setdefault(suffix, set())
def recursive_lookup(collection, suffix, used_ids, subsets):
# get all EO objects related to this collection, excluding
# those already searched
eo_objects = models.EOObject.objects.filter(
collections__in=[collection.pk]
).exclude(
pk__in=used_ids
).order_by("begin_time", "end_time")
# apply subsets
eo_objects = subsets.filter(eo_objects)
selection = LayerSelection()
# append all retrived EO objects, either as a coverage of
# the real type, or as a subgroup.
for eo_object in eo_objects:
used_ids.add(eo_object.pk)
if models.iscoverage(eo_object):
selection.append(eo_object.cast(), eo_object.identifier)
elif models.iscollection(eo_object):
selection.extend(recursive_lookup(
eo_object, suffix, used_ids, subsets
))
else:
pass
return selection
root_group.append(
LayerSelection(
eo_object, suffix,
recursive_lookup(eo_object, suffix, used_ids, subsets)
)
)
elif models.iscoverage(eo_object):
# Add a layer selection for the coverage with the suffix
selection = LayerSelection(None, suffix=suffix)
if subsets.matches(eo_object):
selection.append(eo_object.cast(), eo_object.identifier)
else:
selection.append(None, eo_object.identifier)
root_group.append(selection)
return root_group
def handle(self, request):
decoder = WMS13GetLegendGraphicDecoder(request.GET)
layer_name = decoder.layer
coverage_id = decoder.coverage
suffixes = (None, "_bands", "_outlines")
for suffix in suffixes:
try:
if len(suffix or "") == 0:
identifier = layer_name
else:
layer_name[-len(suffix):]
eo_object = models.EOObject.objects.get(identifier=identifier)
break
except models.EOObject.DoesNotExist:
pass
else:
raise InvalidParameterException(
"No such layer '%s'." % layer_name, "layer"
)
if models.iscollection(eo_object):
def recursive_lookup(collection, used_ids, suffix):
eo_objects = models.EOObject.objects.filter(
collections__in=[collection.pk]
).exclude(
pk__in=used_ids
)
result = []
for eo_object in eo_objects:
used_ids.add(eo_object.pk)
if models.iscoverage(eo_object):
result.append((eo_object.cast(), suffix))
elif models.iscollection(eo_object):
result.extend(
recursive_lookup(eo_object, used_ids, suffix)
)
else:
pass
return result
used_ids = set()
coverages = recursive_lookup(eo_object, used_ids, suffix)
collection = eo_object
if coverage_id:
for coverage in coverages:
if coverage.identifier == coverage_id:
coverages = ((coverage, suffix),)
break
else:
raise InvalidParameterException(
"Layer '%s' does not contain a coverage with ID '%s'.",
"coverage"
)
else:
collection = None
coverages = ((eo_object.cast(), suffix),)
layer_selection = LayerSelection(
collection.identifier if collection else None
)
layer_selection.extend(coverages)
result, _ = self.renderer.render(layer_selection, request.GET.items())
return to_http_response(result)
def handle(self, request):
decoder = WMS13GetLegendGraphicDecoder(request.GET)
layer_name = decoder.layer
coverage_id = decoder.coverage
suffixes = self.renderer.suffixes
for suffix in suffixes:
try:
if len(suffix or "") == 0:
identifier = layer_name
else:
identifier = layer_name[-len(suffix):]
eo_object = models.EOObject.objects.get(identifier=identifier)
break
except models.EOObject.DoesNotExist:
pass
else:
raise InvalidParameterException(
"No such layer '%s'." % layer_name, "layer"
)
if models.iscollection(eo_object):
def recursive_lookup(collection, used_ids, suffix):
eo_objects = models.EOObject.objects.filter(
collections__in=[collection.pk]
).exclude(
pk__in=used_ids
)
result = []
for eo_object in eo_objects:
used_ids.add(eo_object.pk)
if models.iscoverage(eo_object):
result.append((eo_object.cast(), suffix))
elif models.iscollection(eo_object):
result.extend(
recursive_lookup(eo_object, used_ids, suffix)
)
else:
pass
return result
used_ids = set()
coverages = recursive_lookup(eo_object, used_ids, suffix)
collection = eo_object
if coverage_id:
for coverage in coverages:
if coverage.identifier == coverage_id:
coverages = ((coverage, suffix),)
break
else:
raise InvalidParameterException(
"Layer '%s' does not contain a coverage with ID '%s'.",
"coverage"
)
else:
collection = None
coverages = ((eo_object.cast(), suffix),)
layer_selection = LayerSelection(
collection if collection else None
)
layer_selection.extend(coverages)
result, _ = self.renderer.render(layer_selection, request.GET.items())
return to_http_response(result)
def _get_children_ids(obj):
id_list = [obj.id]
for child in obj.eo_objects.all():
if iscollection(child):
id_list.extend(_get_children_ids(child.cast()))
return id_list
def lookup_layers(layers, subsets, suffixes=None):
""" Performs a layer lookup for the given layer names. Applies the given
subsets and looks up all layers with the given suffixes. Returns a
list of ``LayerSelection`` objects.
"""
suffixes = suffixes or (None,)
logger.debug("Tested suffixes: %s", suffixes)
# ------------------------------------------------------------------------
# local closures:
def _lookup_eoobject(layer_name):
""" Search an EOObject matching the given layer name. """
for suffix in suffixes:
if not suffix:
identifier = layer_name
elif layer_name.endswith(suffix):
identifier = layer_name[:-len(suffix)]
else: # no match found
continue
eo_objects = list(models.EOObject.objects.filter(identifier=identifier))
if len(eo_objects) > 0:
return eo_objects[0], suffix
raise LayerNotDefined(layer_name)
def _get_wms_view(eo_object):
""" Get an EOObject used for the WMS view. If there is no WMS view
object the closure returns the input object.
"""
try:
md_item = eo_object.metadata_items.get(semantic="wms_view")
return models.EOObject.objects.get(identifier=md_item.value)
except ObjectDoesNotExist:
return eo_object
def _get_alias(eo_object):
""" Get an EOObject alias, i.e., an identifier of the EOObject
the given EOOobject provides the WMS view to.
"""
try:
return eo_object.metadata_items.get(semantic="wms_alias").value
except ObjectDoesNotExist:
return None
def _recursive_lookup(collection):
""" Search recursively through the nested collections
and find the relevant EOObjects."""
eo_objects = subsets.filter(models.EOObject.objects\
.filter(collections__in=[collection.pk])\
.exclude(pk__in=used_ids)\
.order_by("begin_time", "end_time", "identifier")\
.prefetch_related('metadata_items'))
for eo_object in eo_objects:
used_ids.add(eo_object.pk)
if models.iscoverage(eo_object):
selection.append(eo_object.cast(), _get_alias(eo_object))
elif models.iscollection(eo_object):
_recursive_lookup(eo_object)
else:
pass # TODO: Reporting of invalid EOObjects (?)
# ------------------------------------------------------------------------
selections = []
# NOTE: The lookup is performed on a set of unique layer names. This has
# no effect on the rendering order of the layer as this is determined
# by the WMS request handled by the mapserver.
for layer_name in set(layers):
# get an EOObject and suffix matching the layer_name
eoo_src, suffix = _lookup_eoobject(layer_name)
# get EOObject holding the WMS view
eoo_wms = _get_wms_view(eoo_src)
# prepare the final EOObject(s) selection
selection = LayerSelection(eoo_src, suffix)
if models.iscollection(eoo_wms): # EOObject is a collection
used_ids = set()
# recursively look-up the coverages
_recursive_lookup(eoo_wms)
elif models.iscoverage(eoo_wms): # EOObject is a coverage
# append to the selection if the coverage matches the subset
if subsets.matches(eoo_wms):
selection.append(eoo_wms.cast(), eoo_src.identifier)
else:
pass # TODO: Reporting of invalid EOObjects (?)
selections.append(selection)
return selections
