diff options
Diffstat (limited to 'AppPkg/Applications/Python/Python-2.7.10/Lib/xml/etree/ElementPath.py')
-rw-r--r-- | AppPkg/Applications/Python/Python-2.7.10/Lib/xml/etree/ElementPath.py | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/AppPkg/Applications/Python/Python-2.7.10/Lib/xml/etree/ElementPath.py b/AppPkg/Applications/Python/Python-2.7.10/Lib/xml/etree/ElementPath.py new file mode 100644 index 0000000000..5c117c3264 --- /dev/null +++ b/AppPkg/Applications/Python/Python-2.7.10/Lib/xml/etree/ElementPath.py @@ -0,0 +1,303 @@ +#
+# ElementTree
+# $Id: ElementPath.py 3375 2008-02-13 08:05:08Z fredrik $
+#
+# limited xpath support for element trees
+#
+# history:
+# 2003-05-23 fl created
+# 2003-05-28 fl added support for // etc
+# 2003-08-27 fl fixed parsing of periods in element names
+# 2007-09-10 fl new selection engine
+# 2007-09-12 fl fixed parent selector
+# 2007-09-13 fl added iterfind; changed findall to return a list
+# 2007-11-30 fl added namespaces support
+# 2009-10-30 fl added child element value filter
+#
+# Copyright (c) 2003-2009 by Fredrik Lundh. All rights reserved.
+#
+# fredrik@pythonware.com
+# http://www.pythonware.com
+#
+# --------------------------------------------------------------------
+# The ElementTree toolkit is
+#
+# Copyright (c) 1999-2009 by Fredrik Lundh
+#
+# By obtaining, using, and/or copying this software and/or its
+# associated documentation, you agree that you have read, understood,
+# and will comply with the following terms and conditions:
+#
+# Permission to use, copy, modify, and distribute this software and
+# its associated documentation for any purpose and without fee is
+# hereby granted, provided that the above copyright notice appears in
+# all copies, and that both that copyright notice and this permission
+# notice appear in supporting documentation, and that the name of
+# Secret Labs AB or the author not be used in advertising or publicity
+# pertaining to distribution of the software without specific, written
+# prior permission.
+#
+# SECRET LABS AB AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
+# TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANT-
+# ABILITY AND FITNESS. IN NO EVENT SHALL SECRET LABS AB OR THE AUTHOR
+# BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
+# DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+# ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+# OF THIS SOFTWARE.
+# --------------------------------------------------------------------
+
+# Licensed to PSF under a Contributor Agreement.
+# See http://www.python.org/psf/license for licensing details.
+
+##
+# Implementation module for XPath support. There's usually no reason
+# to import this module directly; the <b>ElementTree</b> does this for
+# you, if needed.
+##
+
+import re
+
+xpath_tokenizer_re = re.compile(
+ "("
+ "'[^']*'|\"[^\"]*\"|"
+ "::|"
+ "//?|"
+ "\.\.|"
+ "\(\)|"
+ "[/.*:\[\]\(\)@=])|"
+ "((?:\{[^}]+\})?[^/\[\]\(\)@=\s]+)|"
+ "\s+"
+ )
+
+def xpath_tokenizer(pattern, namespaces=None):
+ for token in xpath_tokenizer_re.findall(pattern):
+ tag = token[1]
+ if tag and tag[0] != "{" and ":" in tag:
+ try:
+ prefix, uri = tag.split(":", 1)
+ if not namespaces:
+ raise KeyError
+ yield token[0], "{%s}%s" % (namespaces[prefix], uri)
+ except KeyError:
+ raise SyntaxError("prefix %r not found in prefix map" % prefix)
+ else:
+ yield token
+
+def get_parent_map(context):
+ parent_map = context.parent_map
+ if parent_map is None:
+ context.parent_map = parent_map = {}
+ for p in context.root.iter():
+ for e in p:
+ parent_map[e] = p
+ return parent_map
+
+def prepare_child(next, token):
+ tag = token[1]
+ def select(context, result):
+ for elem in result:
+ for e in elem:
+ if e.tag == tag:
+ yield e
+ return select
+
+def prepare_star(next, token):
+ def select(context, result):
+ for elem in result:
+ for e in elem:
+ yield e
+ return select
+
+def prepare_self(next, token):
+ def select(context, result):
+ for elem in result:
+ yield elem
+ return select
+
+def prepare_descendant(next, token):
+ token = next()
+ if token[0] == "*":
+ tag = "*"
+ elif not token[0]:
+ tag = token[1]
+ else:
+ raise SyntaxError("invalid descendant")
+ def select(context, result):
+ for elem in result:
+ for e in elem.iter(tag):
+ if e is not elem:
+ yield e
+ return select
+
+def prepare_parent(next, token):
+ def select(context, result):
+ # FIXME: raise error if .. is applied at toplevel?
+ parent_map = get_parent_map(context)
+ result_map = {}
+ for elem in result:
+ if elem in parent_map:
+ parent = parent_map[elem]
+ if parent not in result_map:
+ result_map[parent] = None
+ yield parent
+ return select
+
+def prepare_predicate(next, token):
+ # FIXME: replace with real parser!!! refs:
+ # http://effbot.org/zone/simple-iterator-parser.htm
+ # http://javascript.crockford.com/tdop/tdop.html
+ signature = []
+ predicate = []
+ while 1:
+ token = next()
+ if token[0] == "]":
+ break
+ if token[0] and token[0][:1] in "'\"":
+ token = "'", token[0][1:-1]
+ signature.append(token[0] or "-")
+ predicate.append(token[1])
+ signature = "".join(signature)
+ # use signature to determine predicate type
+ if signature == "@-":
+ # [@attribute] predicate
+ key = predicate[1]
+ def select(context, result):
+ for elem in result:
+ if elem.get(key) is not None:
+ yield elem
+ return select
+ if signature == "@-='":
+ # [@attribute='value']
+ key = predicate[1]
+ value = predicate[-1]
+ def select(context, result):
+ for elem in result:
+ if elem.get(key) == value:
+ yield elem
+ return select
+ if signature == "-" and not re.match("\d+$", predicate[0]):
+ # [tag]
+ tag = predicate[0]
+ def select(context, result):
+ for elem in result:
+ if elem.find(tag) is not None:
+ yield elem
+ return select
+ if signature == "-='" and not re.match("\d+$", predicate[0]):
+ # [tag='value']
+ tag = predicate[0]
+ value = predicate[-1]
+ def select(context, result):
+ for elem in result:
+ for e in elem.findall(tag):
+ if "".join(e.itertext()) == value:
+ yield elem
+ break
+ return select
+ if signature == "-" or signature == "-()" or signature == "-()-":
+ # [index] or [last()] or [last()-index]
+ if signature == "-":
+ index = int(predicate[0]) - 1
+ else:
+ if predicate[0] != "last":
+ raise SyntaxError("unsupported function")
+ if signature == "-()-":
+ try:
+ index = int(predicate[2]) - 1
+ except ValueError:
+ raise SyntaxError("unsupported expression")
+ else:
+ index = -1
+ def select(context, result):
+ parent_map = get_parent_map(context)
+ for elem in result:
+ try:
+ parent = parent_map[elem]
+ # FIXME: what if the selector is "*" ?
+ elems = list(parent.findall(elem.tag))
+ if elems[index] is elem:
+ yield elem
+ except (IndexError, KeyError):
+ pass
+ return select
+ raise SyntaxError("invalid predicate")
+
+ops = {
+ "": prepare_child,
+ "*": prepare_star,
+ ".": prepare_self,
+ "..": prepare_parent,
+ "//": prepare_descendant,
+ "[": prepare_predicate,
+ }
+
+_cache = {}
+
+class _SelectorContext:
+ parent_map = None
+ def __init__(self, root):
+ self.root = root
+
+# --------------------------------------------------------------------
+
+##
+# Generate all matching objects.
+
+def iterfind(elem, path, namespaces=None):
+ # compile selector pattern
+ if path[-1:] == "/":
+ path = path + "*" # implicit all (FIXME: keep this?)
+ try:
+ selector = _cache[path]
+ except KeyError:
+ if len(_cache) > 100:
+ _cache.clear()
+ if path[:1] == "/":
+ raise SyntaxError("cannot use absolute path on element")
+ next = iter(xpath_tokenizer(path, namespaces)).next
+ token = next()
+ selector = []
+ while 1:
+ try:
+ selector.append(ops[token[0]](next, token))
+ except StopIteration:
+ raise SyntaxError("invalid path")
+ try:
+ token = next()
+ if token[0] == "/":
+ token = next()
+ except StopIteration:
+ break
+ _cache[path] = selector
+ # execute selector pattern
+ result = [elem]
+ context = _SelectorContext(elem)
+ for select in selector:
+ result = select(context, result)
+ return result
+
+##
+# Find first matching object.
+
+def find(elem, path, namespaces=None):
+ try:
+ return iterfind(elem, path, namespaces).next()
+ except StopIteration:
+ return None
+
+##
+# Find all matching objects.
+
+def findall(elem, path, namespaces=None):
+ return list(iterfind(elem, path, namespaces))
+
+##
+# Find text for first matching object.
+
+def findtext(elem, path, default=None, namespaces=None):
+ try:
+ elem = iterfind(elem, path, namespaces).next()
+ return elem.text or ""
+ except StopIteration:
+ return default
|