def get_xsd_element_occurrences(xsd_string, xpath):
"""Get the min and max occurrences of the element.
Args:
xsd_string:
xpath:
Returns:
"""
# build the xsd tree
xsd_tree = XSDTree.build_tree(xsd_string)
# get the namespaces
namespaces = get_namespaces(xsd_string)
# get the default prefix
default_prefix = get_default_prefix(namespaces)
# set the element namespace
xpath = xpath.replace(default_prefix + ":", LXML_SCHEMA_NAMESPACE)
# add the element to the sequence
element = xsd_tree.find(xpath)
if "minOccurs" in element.attrib:
min_occurs = element.attrib["minOccurs"]
else:
min_occurs = "1"
if "maxOccurs" in element.attrib:
max_occurs = element.attrib["maxOccurs"]
else:
max_occurs = "1"
return min_occurs, max_occurs
def get_element_by_xpath(xsd_tree, xpath, namespaces=None):
"""Returns an element from its xpath
Args:
xsd_tree:
xpath:
namespaces:
Returns:
"""
if namespaces is not None:
# Get default prefix
default_prefix = get_default_prefix(namespaces)
# Transform xpath into LXML format
xpath = xpath.replace(default_prefix + ":",
xml_utils_constants.LXML_SCHEMA_NAMESPACE)
try:
element = xsd_tree.find(xpath)
except:
raise XMLError('Unable to find an element for the given Xpath.')
if element is not None:
return element
else:
raise XMLError('Unable to find an element for the given Xpath.')
def test_get_xsd_prefix(self):
xsd_string = (
"<xsd:schema xmlns:xsd='http://www.w3.org/2001/XMLSchema'></xsd:schema>"
)
namespaces = get_namespaces(xsd_string)
prefix = get_default_prefix(namespaces)
self.assertTrue(prefix == "xsd")
def rename_xsd_element(xsd_string, xpath, new_name):
"""Rename xsd element.
Args:
xsd_string:
xpath:
new_name:
Returns:
"""
# build the xsd tree
xsd_tree = XSDTree.build_tree(xsd_string)
# get the namespaces
namespaces = get_namespaces(xsd_string)
# get the default prefix
default_prefix = get_default_prefix(namespaces)
# set the element namespace
xpath = xpath.replace(default_prefix + ":", LXML_SCHEMA_NAMESPACE)
# rename element
xsd_tree.find(xpath).attrib["name"] = new_name
# rebuild xsd string
xsd_string = XSDTree.tostring(xsd_tree)
# return xsd string
return xsd_string
def insert_element_built_in_type(xsd_string, xpath, element_type_name):
"""Insert element with a builtin type in xsd string.
Args:
xsd_string: xsd string
xpath: xpath where to insert the element
element_type_name: name of the type to insert
Returns:
"""
# build the dom tree of the schema being built
xsd_tree = XSDTree.build_tree(xsd_string)
# get namespaces information for the schema
namespaces = get_namespaces(xsd_string)
# get the default namespace
default_prefix = get_default_prefix(namespaces)
# build xpath to element
xpath = xpath.replace(default_prefix + ":", LXML_SCHEMA_NAMESPACE)
type_name = default_prefix + ':' + element_type_name
xsd_tree.find(xpath).append(
XSDTree.create_element("{}element".format(LXML_SCHEMA_NAMESPACE),
attrib={
'type': type_name,
'name': element_type_name
}))
# validate XML schema
error = validate_xml_schema(xsd_tree)
# if errors, raise exception
if error is not None:
raise XMLError(error)
return XSDTree.tostring(xsd_tree)
def set_xsd_element_occurrences(xsd_string, xpath, min_occurs, max_occurs):
"""Set occurrences of element.
Args:
xsd_string:
xpath:
min_occurs:
max_occurs:
Returns:
"""
# build xsd tree
xsd_tree = XSDTree.build_tree(xsd_string)
# get namespaces
namespaces = get_namespaces(xsd_string)
# get default prefix
default_prefix = get_default_prefix(namespaces)
# set the element namespace
xpath = xpath.replace(default_prefix + ":", LXML_SCHEMA_NAMESPACE)
# add the element to the sequence
element = xsd_tree.find(xpath)
element.attrib["minOccurs"] = min_occurs
element.attrib["maxOccurs"] = max_occurs
# save the tree in the session
xsd_string = XSDTree.tostring(xsd_tree)
# return xsd string
return xsd_string
def delete_xsd_element(xsd_string, xpath):
"""Delete element from tree.
Args:
xsd_string:
xpath:
Returns:
"""
# build xsd tree
xsd_tree = XSDTree.build_tree(xsd_string)
# get xsd namespaces
namespaces = get_namespaces(xsd_string)
# get default prefix
default_prefix = get_default_prefix(namespaces)
# set the element namespace
xpath = xpath.replace(default_prefix + ":", LXML_SCHEMA_NAMESPACE)
# get element to remove from tree
element_to_remove = xsd_tree.find(xpath)
# remove element from tree
element_to_remove.getparent().remove(element_to_remove)
# rebuild xsd string
xsd_string = XSDTree.tostring(xsd_tree)
# return xsd string
return xsd_string
def check_query_form(form_values, template_id, request=None):
"""Checks that values entered by the user match each element type
Args:
form_values:
template_id:
request:
Returns:
"""
template = template_api.get(template_id, request=request)
namespaces = get_namespaces(template.content)
default_prefix = get_default_prefix(namespaces)
# check if there are no errors in the query
errors = []
if len(form_values) == 0:
errors.append("The query is empty.")
for field in form_values:
element_value = get_element_value(field)
element_name = field.get("name", "Unnamed field")
element_type = field.get("type", None)
# If there is a type to check
if element_type:
error = validate_element_value(
element_name, element_type, element_value, default_prefix
)
if error is not None:
errors.append(error)
return errors
def _fields_to_query(form_values, template_id,
get_dot_notation_to_element_func, use_wildcard):
"""Takes values from the html tree and creates a query from them
Args:
form_values:
template_id:
use_wildcard:
get_dot_notation_to_element_func:
Returns:
"""
# get template
template = template_api.get(template_id)
# get namespaces
namespaces = get_namespaces(template.content)
# get default prefix
default_prefix = get_default_prefix(namespaces)
query = dict()
for field in form_values:
bool_comp = field['operator']
is_not = bool_comp == 'NOT'
element_type = field.get('type', None)
# get element value
value = get_element_value(field)
# get comparison operator
comparison = get_element_comparison(field)
element_id = field['id']
if element_type == "query":
try:
saved_query = saved_query_api.get_by_id(element_id)
except DoesNotExist:
raise MongoQueryException(
"The saved query does not exist anymore.")
criteria = build_query_criteria(json.loads(saved_query.query),
is_not)
else:
data_structure_element = data_structure_element_api.get_by_id(
element_id)
element = get_dot_notation_to_element_func(data_structure_element,
namespaces)
criteria = build_criteria(element, comparison, value, element_type,
default_prefix, is_not, use_wildcard)
if bool_comp == 'OR':
query = build_or_criteria(query, criteria)
elif bool_comp == 'AND':
query = build_and_criteria(query, criteria)
else:
if form_values.index(field) == 0:
query.update(criteria)
else:
query = build_and_criteria(query, criteria)
return query
def update_user_input(request):
"""Updates the user input of the query builder according to the type of the selected element
Args:
request:
Returns:
"""
from_element_id = request.POST['elementID']
template_id = request.POST['templateID']
# get schema element
data_structure_element = data_structure_element_api.get_by_id(
from_element_id)
# get template
template = template_api.get(template_id)
# convert xml path to mongo dot notation
namespaces = get_namespaces(template.content)
default_prefix = get_default_prefix(namespaces)
element_type = data_structure_element.options['type']
user_inputs = get_user_inputs(element_type, data_structure_element,
default_prefix)
response_dict = {'userInputs': user_inputs, 'element_type': element_type}
return HttpResponse(json.dumps(response_dict),
content_type='application/javascript')
def insert_sub_elements_query(request):
"""Inserts a query for a sub element in the query builder
Args:
request:
Returns:
"""
form_values = json.loads(request.POST["formValues"])
template_id = request.POST["templateID"]
criteria_id = request.POST["criteriaID"]
# get template
template = template_api.get(template_id, request=request)
# get template namespaces
namespaces = get_namespaces(template.content)
# get default prefix
default_prefix = get_default_prefix(namespaces)
# keep only selected fields
form_values = [field for field in form_values if field["selected"] is True]
errors = check_query_form(form_values, template_id, request=request)
if len(errors) == 0:
query = sub_elements_to_query(form_values, namespaces, default_prefix,
request)
displayed_query = sub_elements_to_pretty_query(form_values, namespaces,
request)
ui_id = "ui" + criteria_id[4:]
temporary_query = SavedQuery(
user_id=ExploreExampleAppConfig.name,
template=template,
query=json.dumps(query),
displayed_query=displayed_query,
)
saved_query_api.upsert(temporary_query)
response_dict = {
"criteriaID": criteria_id,
"prettyQuery": displayed_query,
"uiID": ui_id,
"queryID": str(temporary_query.id),
}
else:
return HttpResponseBadRequest("<br/>".join(errors),
content_type="application/javascript")
return HttpResponse(json.dumps(response_dict),
content_type="application/javascript")
def get_sub_elements_query_builder(request):
"""Build the form for queries on sub elements
Args:
request:
Returns:
"""
leaves_id = request.POST["leavesID"]
template_id = request.POST["templateID"]
# get list of ids from string
list_leaves_id = leaves_id.split(" ")
# get template
template = template_api.get(template_id, request=request)
# get template namespaces
namespaces = get_namespaces(template.content)
# get default prefix
default_prefix = get_default_prefix(namespaces)
# get the parent name using the first schema element of the list
parent_name = get_parent_name(list_leaves_id[0], namespaces, request)
form_fields = []
for leaf_id in list_leaves_id:
data_structure_element = data_structure_element_api.get_by_id(
leaf_id, request)
element_type = data_structure_element.options["type"]
element_name = data_structure_element.options["name"]
user_inputs = get_user_inputs(element_type, data_structure_element,
default_prefix)
form_fields.append({
"element_id": leaf_id,
"element_name": element_name,
"element_type": element_type,
"html": user_inputs,
})
response_dict = {
"subElementQueryBuilder":
render_sub_elements_query(parent_name, form_fields)
}
return HttpResponse(json.dumps(response_dict),
content_type="application/javascript")
def change_xsd_element_type(xsd_string, xpath, type_name):
"""Change the type of an element (e.g. sequence -> choice).
Args:
xsd_string:
xpath:
type_name:
Returns:
"""
xsd_tree = XSDTree.build_tree(xsd_string)
namespaces = get_namespaces(xsd_string)
default_prefix = get_default_prefix(namespaces)
# set the element namespace
xpath = xpath.replace(default_prefix + ":", LXML_SCHEMA_NAMESPACE)
xsd_tree.find(xpath).tag = LXML_SCHEMA_NAMESPACE + type_name
# rebuild xsd string
xsd_string = XSDTree.tostring(xsd_tree)
# return xsd string
return xsd_string
def test_get_no_prefix(self):
xsd_string = "<schema></schema>"
namespaces = get_namespaces(xsd_string)
prefix = get_default_prefix(namespaces)
self.assertTrue(prefix == "")
def _insert_element_type(xsd_string, xpath, type_content, element_type_name,
include_url):
"""Insert an element of given type in xsd string.
Args:
xsd_string: xsd string
xpath: xpath where to insert the element
type_content: string content of the type to insert
element_type_name: name of the type
include_url: url used to reference the type in schemaLocation
Returns:
"""
# build the dom tree of the schema being built
xsd_tree = XSDTree.build_tree(xsd_string)
# get namespaces information for the schema
namespaces = get_namespaces(xsd_string)
# get the default namespace
default_prefix = get_default_prefix(namespaces)
# get target namespace information
target_namespace, target_namespace_prefix = get_target_namespace(
xsd_tree, namespaces)
# build xpath to element
xpath = xpath.replace(default_prefix + ":", LXML_SCHEMA_NAMESPACE)
# build xsd tree
type_xsd_tree = XSDTree.build_tree(type_content)
# get namespaces information for the type
type_namespaces = get_namespaces(type_content)
# get target namespace information
type_target_namespace, type_target_namespace_prefix = get_target_namespace(
type_xsd_tree, type_namespaces)
# get the type from the included/imported file
# If there is a complex type
element_type = type_xsd_tree.find(
"{}complexType".format(LXML_SCHEMA_NAMESPACE))
if element_type is None:
# If there is a simple type
element_type = type_xsd_tree.find(
"{}simpleType".format(LXML_SCHEMA_NAMESPACE))
type_name = element_type.attrib["name"]
# format type name to avoid forbidden xml characters
element_type_name = _get_valid_xml_name(element_type_name)
# variable that indicates if namespaces map needs to be updated
update_ns_map = False
# Schema without target namespace
if target_namespace is None:
# Type without target namespace
if type_target_namespace is None:
# create type name with namespace
ns_type_name = type_name
# create include element
dependency_tag = "include"
dependency_attrib = {"schemaLocation": include_url}
# Type with target namespace
else:
# create type name with namespace
ns_type_name = _get_ns_type_name(type_target_namespace_prefix,
type_name,
prefix_required=True)
# create import element
dependency_tag = "import"
dependency_attrib = {
"schemaLocation": include_url,
"namespace": type_target_namespace,
}
update_ns_map = True
# Schema with target namespace
else:
# Type without target namespace
if type_target_namespace is None:
# create type name with namespace
ns_type_name = _get_ns_type_name(target_namespace_prefix,
type_name)
# create include element
dependency_tag = "include"
dependency_attrib = {"schemaLocation": include_url}
# Type with target namespace
else:
# Same target namespace as base template
if target_namespace == type_target_namespace:
# create type name with namespace
ns_type_name = _get_ns_type_name(target_namespace_prefix,
type_name)
# create include element
dependency_tag = "include"
dependency_attrib = {"schemaLocation": include_url}
# Different target namespace as base template
else:
# create type name with namespace
ns_type_name = _get_ns_type_name(type_target_namespace_prefix,
type_name,
prefix_required=True)
# create import element
dependency_tag = "import"
dependency_attrib = {
"schemaLocation": include_url,
"namespace": type_target_namespace,
}
update_ns_map = True
# create dependency element
dependency_element = _create_xsd_element(dependency_tag, dependency_attrib)
# create xsd element
xsd_element = _create_xsd_element("element",
attrib={
"name": element_type_name,
"type": ns_type_name
})
# check if dependency element (include/import) is already present
dependency_tag = "{0}[@schemaLocation='{1}']".format(
dependency_element.tag, dependency_element.attrib["schemaLocation"])
dependency_present = xsd_tree.find(dependency_tag) is not None
if not dependency_present:
# add dependency element (include/import)
xsd_tree.getroot().insert(0, dependency_element)
# add xsd element
xsd_tree.find(xpath).append(xsd_element)
# if namespace map of the schema needs to be updated
if not dependency_present and update_ns_map:
root = xsd_tree.getroot()
root_ns_map = root.nsmap
if (type_target_namespace_prefix in list(root_ns_map.keys())
and root_ns_map[type_target_namespace_prefix] !=
type_target_namespace):
raise CoreError(
"The namespace prefix is already declared for a different namespace."
)
else:
root_ns_map[type_target_namespace_prefix] = type_target_namespace
new_root = XSDTree.create_element(root.tag,
nsmap=root_ns_map,
attrib=root.attrib)
new_root[:] = root[:]
# return result tree
return new_root
else:
# return result tree
return xsd_tree
