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import functools
import re
from typing import Dict, Optional, Tuple
from xsdata.models.enums import Namespace
from xsdata.utils import text
__uri_ignore__ = ("www", "xsd", "wsdl")
URI_REGEX = re.compile(
r"^(([a-zA-Z][0-9a-zA-Z+\\-\\.]*:)?"
r"/{0,2}[0-9a-zA-Z;/?:@&=+$\\.\\-_!~*'()%]+)?"
r"(#[0-9a-zA-Z;/?:@&=+$\\.\\-_!~*'()%]+)?$"
)
def load_prefix(uri: str, ns_map: Dict) -> Optional[str]:
"""Get or create a prefix for the given uri in the prefix-URI namespace
mapping."""
for prefix, ns in ns_map.items():
if ns == uri:
return prefix
return generate_prefix(uri, ns_map)
def generate_prefix(uri: str, ns_map: Dict) -> str:
"""Generate and add a prefix for the given uri in the prefix-URI namespace
mapping."""
namespace = Namespace.get_enum(uri)
if namespace:
prefix = namespace.prefix
else:
number = len(ns_map)
prefix = f"ns{number}"
ns_map[prefix] = uri
return prefix
def prefix_exists(uri: str, ns_map: Dict) -> bool:
"""Check if the uri exists in the prefix-URI namespace mapping."""
return uri in ns_map.values()
def is_default(uri: str, ns_map: Dict) -> bool:
"""Check if the uri exists and it has no prefix."""
return any(uri == ns and not prefix for prefix, ns in ns_map.items())
def clean_prefixes(ns_map: Dict) -> Dict:
"""Remove default namespace if it's also assigned to a prefix."""
result = {}
for prefix, ns in ns_map.items():
if ns:
prefix = prefix or None
if prefix not in result:
result[prefix] = ns
default_ns = result.get(None)
if default_ns and any(prefix and ns == default_ns for prefix, ns in result.items()):
result.pop(None)
return result
def clean_uri(namespace: str) -> str:
"""Remove common prefixes and suffixes from a uri string."""
if namespace[:2] == "##":
namespace = namespace[2:]
left, right = text.split(namespace)
if left == "urn":
namespace = right
elif left in ("http", "https"):
namespace = right[2:]
return "_".join(x for x in namespace.split(".") if x not in __uri_ignore__)
def real_xsi_type(qname: str, target_qname: Optional[str]) -> Optional[str]:
"""Determine if the given target qualified name should be used to define a
derived type."""
return target_qname if target_qname != qname else None
@functools.lru_cache(maxsize=50)
def build_qname(tag_or_uri: Optional[str], tag: Optional[str] = None) -> str:
"""Create namespace qualified strings."""
if not tag_or_uri:
if not tag:
raise ValueError("Invalid input both uri and tag are empty.")
return tag
return f"{{{tag_or_uri}}}{tag}" if tag else tag_or_uri
@functools.lru_cache(maxsize=50)
def split_qname(tag: str) -> Tuple:
"""Split namespace qualified strings."""
if tag[0] == "{":
left, right = text.split(tag[1:], "}")
if left:
return left, right
return None, tag
def target_uri(tag: str) -> Optional[str]:
return split_qname(tag)[0]
def local_name(tag: str) -> str:
return split_qname(tag)[1]
NCNAME_PUNCTUATION = {"\u00B7", "\u0387", ".", "-", "_"}
def is_ncname(name: Optional[str]) -> bool:
"""Verify given string is a valid ncname."""
if not name:
return False
char = name[0]
if not char.isalpha() and char != "_":
return False
for char in name[1:]:
if char.isalpha() or char.isdigit() or char in NCNAME_PUNCTUATION:
continue
else:
return False
return True
def is_uri(uri: Optional[str]) -> bool:
"""Verify given string is a valid uri."""
return bool(URI_REGEX.search(uri)) if uri else False
@functools.lru_cache(maxsize=50)
def to_package_name(uri: Optional[str]) -> str:
"""Util method to convert a namespace to a dot style package name."""
if not uri:
return ""
# Remove scheme
domain_sep = "."
if uri.startswith("http://"):
uri = uri[7:]
elif uri.startswith("urn:"):
uri = uri[4:]
domain_sep = "-"
if uri.startswith("xmlns:"):
uri = uri[6:]
uri = uri.replace(":", "/")
# Remote target
pos = uri.find("#")
if pos > 0:
uri = uri[:pos]
tokens = [token for token in uri.split("/") if token.strip()]
if not tokens:
return ""
# Remove extension
if len(tokens) > 1:
last = tokens[-1]
pos = tokens[-1].rfind(".")
if pos > 0:
tokens[-1] = last[:pos]
# Remove port from domain
domain = tokens.pop(0)
pos = domain.find(":")
if pos > 0:
domain = domain[:pos]
# Remove www from domain
if domain.startswith("www"):
domain = domain[3:]
for part in domain.split(domain_sep):
tokens.insert(0, part)
return ".".join(token for token in tokens if token)
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