def parse_scalesize_xml(elem):
""" Parses the XML notation of a single scale size.
"""
axis = elem.findtext(ns_scal("axis"))
if axis not in all_axes:
raise ScaleAxisUndefinedException(axis)
try:
raw = elem.findtext(ns_scal("targetSize"))
value = int(raw)
except ValueError:
InvalidScaleFactorException(raw)
return ScaleSize(axis, value)
def parse_scalesize_kvp(string):
""" Parses the KVP notation of a single scale size.
"""
match = SCALESIZE_RE.match(string)
if not match:
raise Exception("Could not parse input scale size string.")
axis = match.group(1)
if axis not in all_axes:
raise ScaleAxisUndefinedException(axis)
try:
value = int(match.group(2))
except ValueError:
raise InvalidScaleFactorException(match.group(2))
return ScaleSize(axis, value)
def parse_scaleextent_xml(elem):
""" Parses the XML notation of a single scale extent.
"""
axis = elem.findtext(ns_scal("axis"))
if axis not in all_axes:
raise ScaleAxisUndefinedException(axis)
try:
raw_low = elem.findtext(ns_scal("low"))
raw_high = elem.findtext(ns_scal("high"))
low = int(raw_low)
high = int(raw_high)
except ValueError:
InvalidScaleFactorException(raw_high)
if low >= high:
raise InvalidScaleExtentException(low, high)
return ScaleExtent(axis, low, high)
def parse_scaleextent_kvp(string):
""" Parses the KVP notation of a single scale extent.
"""
match = SCALEEXTENT_RE.match(string)
if not match:
raise Exception("Could not parse input scale extent string.")
axis = match.group(1)
if axis not in all_axes:
raise ScaleAxisUndefinedException(axis)
try:
low = int(match.group(2))
high = int(match.group(3))
except ValueError:
raise InvalidScaleFactorException(match.group(3))
if low >= high:
raise InvalidScaleExtentException(low, high)
return ScaleExtent(axis, low, high)