forked from geopython/OWSLib
/
ows.py
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/
ows.py
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# -*- coding: ISO-8859-15 -*-
# =============================================================================
# Copyright (c) 2008 Tom Kralidis
#
# Authors : Tom Kralidis <tomkralidis@gmail.com>
#
# Contact email: tomkralidis@gmail.com
# =============================================================================
"""
API for OGC Web Services Common (OWS) constructs and metadata.
OWS Common: http://www.opengeospatial.org/standards/common
Currently supports version 1.1.0 (06-121r3).
"""
from owslib.etree import etree
from owslib import crs, util
from owslib.namespaces import Namespaces
n = Namespaces()
OWS_NAMESPACE_1_0_0 = n.get_namespace("ows")
OWS_NAMESPACE_1_1_0 = n.get_namespace("ows110")
OWS_NAMESPACE_2_0 = n.get_namespace("ows200")
XSI_NAMESPACE = n.get_namespace("xsi")
XLINK_NAMESPACE = n.get_namespace("xlink")
DEFAULT_OWS_NAMESPACE=OWS_NAMESPACE_1_1_0 #Use this as default for OWSCommon objects
class OwsCommon(object):
"""Initialize OWS Common object"""
def __init__(self,version):
self.version = version
if version == '1.0.0':
self.namespace = OWS_NAMESPACE_1_0_0
else:
self.namespace = OWS_NAMESPACE_1_1_0
class ServiceIdentification(object):
"""Initialize an OWS Common ServiceIdentification construct"""
def __init__(self,infoset,namespace=DEFAULT_OWS_NAMESPACE):
self._root = infoset
val = self._root.find(util.nspath('Title', namespace))
self.title = util.testXMLValue(val)
val = self._root.find(util.nspath('Abstract', namespace))
self.abstract = util.testXMLValue(val)
self.keywords = []
for f in self._root.findall(util.nspath('Keywords/Keyword', namespace)):
if f.text is not None:
self.keywords.append(f.text)
val = self._root.find(util.nspath('AccessConstraints', namespace))
self.accessconstraints = util.testXMLValue(val)
val = self._root.find(util.nspath('Fees', namespace))
self.fees = util.testXMLValue(val)
val = self._root.find(util.nspath('ServiceType', namespace))
self.type = util.testXMLValue(val)
self.service=self.type #alternative? keep both?discuss
val = self._root.find(util.nspath('ServiceTypeVersion', namespace))
self.version = util.testXMLValue(val)
self.profiles = []
for p in self._root.findall(util.nspath('Profile', namespace)):
self.profiles.append(util.testXMLValue(val))
class ServiceProvider(object):
"""Initialize an OWS Common ServiceProvider construct"""
def __init__(self, infoset,namespace=DEFAULT_OWS_NAMESPACE):
self._root = infoset
val = self._root.find(util.nspath('ProviderName', namespace))
self.name = util.testXMLValue(val)
self.contact = ServiceContact(infoset, namespace)
val = self._root.find(util.nspath('ProviderSite', namespace))
if val is not None:
urlattrib=val.attrib[util.nspath('href', XLINK_NAMESPACE)]
self.url = util.testXMLValue(urlattrib, True)
else:
self.url =None
class ServiceContact(object):
"""Initialize an OWS Common ServiceContact construct"""
def __init__(self, infoset,namespace=DEFAULT_OWS_NAMESPACE):
self._root = infoset
val = self._root.find(util.nspath('ProviderName', namespace))
self.name = util.testXMLValue(val)
self.organization=util.testXMLValue(self._root.find(util.nspath('ContactPersonPrimary/ContactOrganization', namespace)))
val = self._root.find(util.nspath('ProviderSite', namespace))
if val is not None:
self.site = util.testXMLValue(val.attrib.get(util.nspath('href', XLINK_NAMESPACE)), True)
else:
self.site = None
val = self._root.find(util.nspath('ServiceContact/Role', namespace))
self.role = util.testXMLValue(val)
val = self._root.find(util.nspath('ServiceContact/IndividualName', namespace))
self.name = util.testXMLValue(val)
val = self._root.find(util.nspath('ServiceContact/PositionName', namespace))
self.position = util.testXMLValue(val)
val = self._root.find(util.nspath('ServiceContact/ContactInfo/Phone/Voice', namespace))
self.phone = util.testXMLValue(val)
val = self._root.find(util.nspath('ServiceContact/ContactInfo/Phone/Facsimile', namespace))
self.fax = util.testXMLValue(val)
val = self._root.find(util.nspath('ServiceContact/ContactInfo/Address/DeliveryPoint', namespace))
self.address = util.testXMLValue(val)
val = self._root.find(util.nspath('ServiceContact/ContactInfo/Address/City', namespace))
self.city = util.testXMLValue(val)
val = self._root.find(util.nspath('ServiceContact/ContactInfo/Address/AdministrativeArea', namespace))
self.region = util.testXMLValue(val)
val = self._root.find(util.nspath('ServiceContact/ContactInfo/Address/PostalCode', namespace))
self.postcode = util.testXMLValue(val)
val = self._root.find(util.nspath('ServiceContact/ContactInfo/Address/Country', namespace))
self.country = util.testXMLValue(val)
val = self._root.find(util.nspath('ServiceContact/ContactInfo/Address/ElectronicMailAddress', namespace))
self.email = util.testXMLValue(val)
val = self._root.find(util.nspath('ServiceContact/ContactInfo/OnlineResource', namespace))
if val is not None:
self.url = util.testXMLValue(val.attrib.get(util.nspath('href', XLINK_NAMESPACE)), True)
else:
self.url = None
val = self._root.find(util.nspath('ServiceContact/ContactInfo/HoursOfService', namespace))
self.hours = util.testXMLValue(val)
val = self._root.find(util.nspath('ServiceContact/ContactInfo/ContactInstructions', namespace))
self.instructions = util.testXMLValue(val)
class Constraint(object):
def __init__(self, elem, namespace=DEFAULT_OWS_NAMESPACE):
self.name = elem.attrib.get('name')
self.values = [i.text for i in elem.findall(util.nspath('Value', namespace))]
self.values += [i.text for i in elem.findall(util.nspath('AllowedValues/Value', namespace))]
def __repr__(self):
if self.values:
return "Constraint: %s - %s" % (self.name, self.values)
else:
return "Constraint: %s" % self.name
class OperationsMetadata(object):
"""Initialize an OWS OperationMetadata construct"""
def __init__(self, elem, namespace=DEFAULT_OWS_NAMESPACE):
if 'name' not in elem.attrib: # This is not a valid element
return
self.name = elem.attrib['name']
self.formatOptions = ['text/xml']
parameters = []
self.methods = []
self.constraints = []
for verb in elem.findall(util.nspath('DCP/HTTP/*', namespace)):
url = util.testXMLAttribute(verb, util.nspath('href', XLINK_NAMESPACE))
if url is not None:
verb_constraints = [Constraint(conts, namespace) for conts in verb.findall(util.nspath('Constraint', namespace))]
self.methods.append({'constraints' : verb_constraints, 'type' : util.xmltag_split(verb.tag), 'url': url})
for parameter in elem.findall(util.nspath('Parameter', namespace)):
if namespace == OWS_NAMESPACE_1_1_0:
parameters.append((parameter.attrib['name'], {'values': [i.text for i in parameter.findall(util.nspath('AllowedValues/Value', namespace))]}))
else:
parameters.append((parameter.attrib['name'], {'values': [i.text for i in parameter.findall(util.nspath('Value', namespace))]}))
self.parameters = dict(parameters)
for constraint in elem.findall(util.nspath('Constraint', namespace)):
self.constraints.append(Constraint(constraint, namespace))
class BoundingBox(object):
"""Initialize an OWS BoundingBox construct"""
def __init__(self, elem, namespace=DEFAULT_OWS_NAMESPACE):
self.minx = None
self.miny = None
self.maxx = None
self.maxy = None
val = elem.attrib.get('crs')
if val is not None:
self.crs = crs.Crs(val)
else:
self.crs = None
val = elem.attrib.get('dimensions')
if val is not None:
self.dimensions = int(util.testXMLValue(val, True))
else: # assume 2
self.dimensions = 2
val = elem.find(util.nspath('LowerCorner', namespace))
tmp = util.testXMLValue(val)
if tmp is not None:
xy = tmp.split()
if len(xy) > 1:
if self.crs is not None and self.crs.axisorder == 'yx':
self.minx, self.miny = xy[1], xy[0]
else:
self.minx, self.miny = xy[0], xy[1]
val = elem.find(util.nspath('UpperCorner', namespace))
tmp = util.testXMLValue(val)
if tmp is not None:
xy = tmp.split()
if len(xy) > 1:
if self.crs is not None and self.crs.axisorder == 'yx':
self.maxx, self.maxy = xy[1], xy[0]
else:
self.maxx, self.maxy = xy[0], xy[1]
class WGS84BoundingBox(BoundingBox):
"""WGS84 bbox, axis order xy"""
def __init__(self, elem, namespace=DEFAULT_OWS_NAMESPACE):
BoundingBox.__init__(self, elem, namespace)
self.dimensions = 2
self.crs = crs.Crs('urn:ogc:def:crs:OGC:2:84')
class ExceptionReport(Exception):
"""OWS ExceptionReport"""
def __init__(self, elem, namespace=DEFAULT_OWS_NAMESPACE):
self.exceptions = []
if hasattr(elem, 'getroot'):
elem = elem.getroot()
for i in elem.findall(util.nspath('Exception', namespace)):
tmp = {}
val = i.attrib.get('exceptionCode')
tmp['exceptionCode'] = util.testXMLValue(val, True)
val = i.attrib.get('locator')
tmp['locator'] = util.testXMLValue(val, True)
val = i.find(util.nspath('ExceptionText', namespace))
tmp['ExceptionText'] = util.testXMLValue(val)
self.exceptions.append(tmp)
# set topmost stacktrace as return message
self.code = self.exceptions[0]['exceptionCode']
self.locator = self.exceptions[0]['locator']
self.msg = self.exceptions[0]['ExceptionText']
self.xml = etree.tostring(elem)
def __str__(self):
return repr(self.msg)