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"""
Copyright 2006-2008 SpringSource (http://springsource.com), All Rights Reserved
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
"""
try:
import cElementTree as etree
except ImportError:
try:
import xml.etree.ElementTree as etree
except ImportError:
from elementtree import ElementTree as etree
import re
import types
import inspect
import logging
from _config_base import *
from springpython.context import scope
from springpython.context import ApplicationContextAware
from springpython.factory import PythonObjectFactory
from springpython.factory import ReflectiveObjectFactory
from springpython.container import InvalidObjectScope
xml_mappings = {
"str":"types.StringType", "unicode":"types.UnicodeType",
"int":"types.IntType", "long":"types.LongType",
"float":"types.FloatType", "decimal":"decimal.Decimal",
"bool":"types.BooleanType", "complex":"types.ComplexType",
}
class PyContainerConfig(Config):
"""
PyContainerConfig supports the legacy XML dialect (PyContainer) of reading object definitions.
"""
NS = "{http://www.springframework.org/springpython/schema/pycontainer-components}"
def __init__(self, config_location):
if isinstance(config_location, list):
self.config_location = config_location
else:
self.config_location = [config_location]
self.logger = logging.getLogger("springpython.config.PyContainerConfig")
def read_object_defs(self):
self.logger.debug("==============================================================")
objects = []
for config in self.config_location:
self.logger.debug("* Parsing %s" % config)
components = etree.parse(config).getroot()
objects.extend([self._convert_component(component) for component in components])
self.logger.debug("==============================================================")
return objects
def _convert_component(self, component):
"This function generates a object definition, then converts scope and property elements."
self.logger.debug("component: Processing %s" % component)
c = ObjectDef(component.get("id"), factory=ReflectiveObjectFactory(component.get("class")))
if "scope" in component.attrib:
c.scope = scope.convert(component.get("scope"))
c.props = [self._convert_prop_def(p) for p in component.findall(self.NS+"property")]
return c
def _convert_prop_def(self, p):
"This function translates object properties into useful dictionaries of information for the container."
if "local" in p.attrib or p.find(self.NS+"local") is not None:
if "local" in p.attrib:
return ReferenceDef(p.get("name"), p.get("local"))
else:
return ReferenceDef(p.get("name"), p.find(self.NS+"local"))
elif "list" in p.attrib or p.find(self.NS+"list") is not None:
if "list" in p.attrib:
return ListDef(p.name, [ReferenceDef(p.name + ".list", prop_list.local) for prop_list in p.list])
else:
return ListDef(p.name, [ReferenceDef(p.name + ".list", prop_list.local) for prop_list in p.list])
else:
self.logger.debug("py: name = %s code = %s" % (p.get("name"), p.text))
thing = eval(str(p.text).strip())
self.logger.debug("py: You have parsed %s" % thing)
return ValueDef(p.get("name"), eval(str(p.text).strip()))
class SpringJavaConfig(Config):
"""
SpringJavaConfig supports current Spring Java format of XML bean definitions.
"""
NS = "{http://www.springframework.org/schema/beans}"
def __init__(self, config_location):
if isinstance(config_location, list):
self.config_location = config_location
else:
self.config_location = [config_location]
self.logger = logging.getLogger("springpython.config.SpringJavaConfig")
# By making this an instance-based property (instead of function local), inner object
# definitions can add themselves to the list in the midst of parsing an input.
self.objects = []
def read_object_defs(self):
self.logger.debug("==============================================================")
# Reset, in case the file is re-read
self.objects = []
for config in self.config_location:
self.logger.debug("* Parsing %s" % config)
beans = etree.parse(config).getroot()
self.objects.extend([self._convert_bean(bean) for bean in beans])
self.logger.debug("==============================================================")
return self.objects
def _convert_bean(self, bean, prefix=""):
"This function generates a object definition, then converts scope and property elements."
if prefix != "":
if "id" in bean.attrib:
bean.set("id", prefix + bean.get("id"))
else:
bean.set("id", prefix + "<anonymous>")
c = ObjectDef(bean.get("id"), factory=ReflectiveObjectFactory(bean.get("class")))
if "scope" in bean.attrib:
c.scope = scope.convert(bean.get("scope"))
self.logger.debug("bean: %s" % bean)
c.pos_constr = [self._convert_prop_def(bean, constr, bean.get("id") + ".constr") for constr in bean.findall(self.NS+"constructor-arg")]
self.logger.debug("Constructors = %s" % c.pos_constr)
c.props = [self._convert_prop_def(bean, p, p.get("name")) for p in bean.findall(self.NS+"property")]
return c
def _convert_prop_def(self, bean, p, name):
"This function translates object constructors/properties into useful collections of information for the container."
if "ref" in p.keys() or p.find(self.NS+"ref") is not None:
if "ref" in p.keys():
return ReferenceDef(name, p.get("ref"))
else:
return ReferenceDef(name, p.find(self.NS+"ref").get("bean"))
elif "value" in p.keys() or p.find(self.NS+"value") is not None:
if "value" in p.keys():
return ValueDef(name, p.get("value"))
else:
return ValueDef(name, p.find(self.NS+"value").text)
elif p.find(self.NS+"map") is not None:
dict = {}
for entry in p.find(self.NS+"map"):
key = entry.find(self.NS+"key").find(self.NS+"value").text
if entry.find(self.NS+"value") is not None:
dict[key] = str(entry.find(self.NS+"value").text)
elif entry.find(self.NS+"ref") is not None:
dict[key] = ReferenceDef(key, entry.find(self.NS+"ref").get("bean"))
else:
self.logger.debug("Don't know how to handle %s" % entry)
return DictDef(name, dict)
elif p.find(self.NS+"props") is not None:
dict = {}
for prop in p.find(self.NS+"props"):
dict[prop.get("key")] = str(prop.text)
return DictDef(name, dict)
elif p.find(self.NS+"list") is not None:
list = []
for element in p.find(self.NS+"list"):
if element.tag == self.NS+"value":
list.append(element.text)
elif element.tag == self.NS+"ref":
list.append(ReferenceDef(name + ".list", element.get("bean")))
else:
self.logger.debug("Don't know how to handle %s" % element.tag)
return ListDef(name, list)
elif p.find(self.NS+"set") is not None:
s = set()
for element in p.find(self.NS+"set"):
if element.tag == self.NS+"value":
s.add(element.text)
elif element.tag == self.NS+"ref":
s.add(ReferenceDef(name + ".set", element.get("bean")))
else:
self.logger.debug("Don't know how to handle %s" % element.tag)
return SetDef(name, s)
elif p.find(self.NS+"bean"):
inner_object_def = self._convert_bean(p.find(self.NS+"bean"), prefix=bean.get("id") + "." + name + ".")
self.objects.append(inner_object_def)
return InnerObjectDef(name, inner_object_def)
class XMLConfig(Config):
"""
XMLConfig supports current Spring Python format of XML object definitions.
"""
NS = "{http://www.springframework.org/springpython/schema/objects}"
NS_11 = "{http://www.springframework.org/springpython/schema/objects/1.1}"
def __init__(self, config_location):
if isinstance(config_location, list):
self.config_location = config_location
else:
self.config_location = [config_location]
self.logger = logging.getLogger("springpython.config.XMLConfig")
# By making this an instance-based property (instead of function local), inner object
# definitions can add themselves to the list in the midst of parsing an input.
self.objects = []
def read_object_defs(self):
self.logger.debug("==============================================================")
# Reset, in case the file is re-read
self.objects = []
for config in self.config_location:
self.logger.debug("* Parsing %s" % config)
# A flat list of objects, as found in the XML document.
objects = etree.parse(config).getroot()
# We need to handle both 1.0 and 1.1 XSD schemata *and* we may be
# passed a list of config locations of different XSD versions so we
# must find out here which one is used in the current config file
# and pass the correct namespace down to other parts of XMLConfig.
ns = objects.tag[:objects.tag.find("}") + 1]
# A dictionary of abstract objects, keyed by their IDs, used in
# traversing the hierarchies of parents; built upfront here for
# convenience.
abstract_objects = {}
for obj in objects:
if obj.get("abstract"):
abstract_objects[obj.get("id")] = obj
for obj in objects:
if obj.get("class") is None and not obj.get("parent"):
self._map_custom_class(obj, xml_mappings, ns)
elif obj.get("parent"):
# Children are added to self.objects during the children->abstract parents traversal.
pos_constr = self._get_pos_constr(obj, ns)
named_constr = self._get_named_constr(obj, ns)
props = self._get_props(obj, ns)
self._traverse_parents(obj, obj, ns, pos_constr, named_constr, props, abstract_objects)
continue
self.objects.append(self._convert_object(obj, ns=ns))
self.logger.debug("==============================================================")
for object in self.objects:
self.logger.debug("Parsed %s" % object)
return self.objects
def _map_custom_class(self, obj, mappings, ns):
""" Fill in the missing attributes of Python objects and make it look
to the rest of XMLConfig as if they already were in the XML config file.
"""
for class_name in mappings:
tag_no_ns = obj.tag.replace(ns, "")
if class_name == tag_no_ns:
obj.set("class", mappings[class_name])
constructor_arg = etree.Element("%s%s" % (ns, "constructor-arg"))
value = etree.Element("%s%s" % (ns, "value"))
value.text = obj.text
obj.append(constructor_arg)
constructor_arg.append(value)
obj.text = ""
break
else:
self.logger.warning("No matching type found for object %s" % obj)
def _traverse_parents(self, leaf, child, ns, pos_constr,
named_constr, props, abstract_objects):
parent = abstract_objects[child.get("parent")]
# At this point we only build up the lists of parameters but we don't create
# the object yet because the current parent object may still have its
# own parent.
# Positional constructors
parent_pos_constrs = self._get_pos_constr(parent, ns)
# Make sure there are as many child positional parameters as there
# are in the parent's list.
len_pos_constr = len(pos_constr)
len_parent_pos_constrs = len(parent_pos_constrs)
if len_pos_constr < len_parent_pos_constrs:
pos_constr.extend([None] * (len_parent_pos_constrs - len_pos_constr))
for idx, parent_pos_constr in enumerate(parent_pos_constrs):
if not pos_constr[idx]:
pos_constr[idx] = parent_pos_constr
# Named constructors
child_named_constrs = named_constr
parent_named_constrs = self._get_named_constr(parent, ns)
for parent_named_constr in parent_named_constrs:
if parent_named_constr not in child_named_constrs:
named_constr[parent_named_constr] = parent_named_constrs[parent_named_constr]
# Properties
child_props = [prop.name for prop in props]
parent_props = self._get_props(parent, ns)
for parent_prop in parent_props:
if parent_prop.name not in child_props:
props.append(parent_prop)
if parent.get("parent"):
self._traverse_parents(leaf, parent, ns, pos_constr, named_constr, props, abstract_objects)
else:
# Now we know we can create an object out of all the accumulated values.
# The object's class is its topmost parent's class.
class_ = parent.get("class")
id, factory, lazy_init, abstract, parent, scope_ = self._get_basic_object_data(leaf, class_)
c = self._create_object(id, factory, lazy_init, abstract, parent,
scope_, pos_constr, named_constr, props)
self.objects.append(c)
return parent
def _get_pos_constr(self, object, ns):
""" Returns a list of all positional constructor arguments of an object.
"""
return [self._convert_prop_def(object, constr, object.get("id") + ".constr", ns) for constr in object.findall(ns+"constructor-arg")
if not "name" in constr.attrib]
def _get_named_constr(self, object, ns):
""" Returns a dictionary of all named constructor arguments of an object.
"""
return dict([(str(constr.get("name")), self._convert_prop_def(object, constr, object.get("id") + ".constr", ns))
for constr in object.findall(ns+"constructor-arg") if "name" in constr.attrib])
def _get_props(self, object, ns):
""" Returns a list of all properties defined by an object.
"""
return [self._convert_prop_def(object, p, p.get("name"), ns) for p in object.findall(ns+"property")]
def _create_object(self, id, factory, lazy_init, abstract, parent,
scope, pos_constr, named_constr, props):
""" A helper function which creates an object out of the supplied
arguments.
"""
c = ObjectDef(id=id, factory=factory, lazy_init=lazy_init,
abstract=abstract, parent=parent)
c.scope = scope
c.pos_constr = pos_constr
c.named_constr = named_constr
c.props = props
self.logger.debug("object: props = %s" % c.props)
self.logger.debug("object: There are %s props" % len(c.props))
return c
def _get_basic_object_data(self, object, class_):
""" A convenience method which creates basic object's data so that
the code is not repeated.
"""
if "scope" in object.attrib:
scope_ = scope.convert(object.get("scope"))
else:
scope_ = scope.SINGLETON
return(object.get("id"), ReflectiveObjectFactory(class_),
object.get("lazy-init", False), object.get("abstract", False),
object.get("parent"), scope_)
def _convert_object(self, object, prefix="", ns=None):
""" This function collects all parameters required for an object creation
and then calls a helper function which creates it.
"""
if prefix != "":
if "id" in object.attrib:
object.set("id", prefix + "." + object.get("id"))
else:
object.set("id", prefix + ".<anonymous>")
id, factory, lazy_init, abstract, parent, scope_ = self._get_basic_object_data(object, object.get("class"))
pos_constr = self._get_pos_constr(object, ns)
named_constr = self._get_named_constr(object, ns)
props = self._get_props(object, ns)
return self._create_object(id, factory, lazy_init, abstract, parent,
scope_, pos_constr, named_constr, props)
def _convert_ref(self, ref_node, name):
if hasattr(ref_node, "attrib"):
results = ReferenceDef(name, ref_node.get("object"))
self.logger.debug("ref: Returning %s" % results)
return results
else:
results = ReferenceDef(name, ref_node)
self.logger.debug("ref: Returning %s" % results)
return results
def _convert_value(self, value, id, name, ns):
if value.text is not None and value.text.strip() != "":
self.logger.debug("value: Converting a direct value <%s>" % value.text)
return value.text
else:
if value.tag == ns+"value":
self.logger.debug("value: Converting a value's children %s" % value.getchildren()[0])
results = self._convert_value(value.getchildren()[0], id, name, ns)
self.logger.debug("value: results = %s" % str(results))
return results
elif value.tag == ns+"tuple":
self.logger.debug("value: Converting a tuple")
return self._convert_tuple(value, id, name, ns).value
elif value.tag == ns+"list":
self.logger.debug("value: Converting a list")
return self._convert_list(value, id, name, ns).value
elif value.tag == ns+"dict":
self.logger.debug("value: Converting a dict")
return self._convert_dict(value, id, name, ns).value
elif value.tag == ns+"set":
self.logger.debug("value: Converting a set")
return self._convert_set(value, id, name, ns).value
elif value.tag == ns+"frozenset":
self.logger.debug("value: Converting a frozenset")
return self._convert_frozen_set(value, id, name, ns).value
else:
self.logger.debug("value: %s.%s Don't know how to handle %s" % (id, name, value.tag))
def _convert_dict(self, dict_node, id, name, ns):
dict = {}
for entry in dict_node.findall(ns+"entry"):
self.logger.debug("dict: entry = %s" % entry)
key = entry.find(ns+"key").find(ns+"value").text
self.logger.debug("dict: key = %s" % key)
if entry.find(ns+"value") is not None:
dict[key] = self._convert_value(entry.find(ns+"value"), id, "%s.dict['%s']" % (name, key), ns)
elif entry.find(ns+"ref") is not None:
dict[key] = self._convert_ref(entry.find(ns+"ref"), "%s.dict['%s']" % (name, key))
elif entry.find(ns+"object") is not None:
self.logger.debug("dict: Parsing an inner object definition...")
dict[key] = self._convert_inner_object(entry.find(ns+"object"), id, "%s.dict['%s']" % (name, key), ns)
else:
for token in ["dict", "tuple", "set", "frozenset", "list"]:
if entry.find(ns+token) is not None:
dict[key] = self._convert_value(entry.find(ns+token), id, "%s.dict['%s']" % (name, key), ns)
break
if key not in dict:
self.logger.debug("dict: Don't know how to handle %s" % entry.tag)
self.logger.debug("Dictionary is now %s" % dict)
return DictDef(name, dict)
def _convert_props(self, props_node, name, ns):
dict = {}
self.logger.debug("props: Looking at %s" % props_node)
for prop in props_node:
dict[prop.get("key")] = str(prop.text)
self.logger.debug("props: Dictionary is now %s" % dict)
return DictDef(name, dict)
def _convert_list(self, list_node, id, name, ns):
list = []
self.logger.debug("list: Parsing %s" % list_node)
for element in list_node:
if element.tag == ns+"value":
list.append(get_string(element.text))
elif element.tag == ns+"ref":
list.append(self._convert_ref(element, "%s.list[%s]" % (name, len(list))))
elif element.tag == ns+"object":
self.logger.debug("list: Parsing an inner object definition...")
list.append(self._convert_inner_object(element, id, "%s.list[%s]" % (name, len(list)), ns))
elif element.tag in [ns+token for token in ["dict", "tuple", "set", "frozenset", "list"]]:
self.logger.debug("This list has child elements of type %s." % element.tag)
list.append(self._convert_value(element, id, "%s.list[%s]" % (name, len(list)), ns))
self.logger.debug("List is now %s" % list)
else:
self.logger.debug("list: Don't know how to handle %s" % element.tag)
self.logger.debug("List is now %s" % list)
return ListDef(name, list)
def _convert_tuple(self, tuple_node, id, name, ns):
list = []
self.logger.debug("tuple: Parsing %s" % tuple_node)
for element in tuple_node:
self.logger.debug("tuple: Looking at %s" % element)
if element.tag == ns+"value":
self.logger.debug("tuple: Appending %s" % element.text)
list.append(get_string(element.text))
elif element.tag == ns+"ref":
list.append(self._convert_ref(element, "%s.tuple(%s}" % (name, len(list))))
elif element.tag == ns+"object":
self.logger.debug("tuple: Parsing an inner object definition...")
list.append(self._convert_inner_object(element, id, "%s.tuple(%s)" % (name, len(list)), ns))
elif element.tag in [ns+token for token in ["dict", "tuple", "set", "frozenset", "list"]]:
self.logger.debug("tuple: This tuple has child elements of type %s." % element.tag)
list.append(self._convert_value(element, id, "%s.tuple(%s)" % (name, len(list)), ns))
self.logger.debug("tuple: List is now %s" % list)
else:
self.logger.debug("tuple: Don't know how to handle %s" % element.tag)
self.logger.debug("Tuple is now %s" % str(tuple(list)))
return TupleDef(name, tuple(list))
def _convert_set(self, set_node, id, name, ns):
s = set()
self.logger.debug("set: Parsing %s" % set_node)
for element in set_node:
self.logger.debug("Looking at element %s" % element)
if element.tag == ns+"value":
s.add(get_string(element.text))
elif element.tag == ns+"ref":
s.add(self._convert_ref(element, name + ".set"))
elif element.tag == ns+"object":
self.logger.debug("set: Parsing an inner object definition...")
s.add(self._convert_inner_object(element, id, "%s.set(%s)" % (name, len(s)), ns))
elif element.tag in [ns+token for token in ["dict", "tuple", "set", "frozenset", "list"]]:
self.logger.debug("set: This set has child elements of type %s." % element.tag)
s.add(self._convert_value(element, id, "%s.set(%s)" % (name,len(s)), ns))
else:
self.logger.debug("set: Don't know how to handle %s" % element.tag)
self.logger.debug("Set is now %s" % s)
return SetDef(name, s)
def _convert_frozen_set(self, frozen_set_node, id, name, ns):
item = self._convert_set(frozen_set_node, id, name, ns)
self.logger.debug("frozenset: Frozen set is now %s" % frozenset(item.value))
return FrozenSetDef(name, frozenset(item.value))
def _convert_inner_object(self, object_node, id, name, ns):
inner_object_def = self._convert_object(object_node, prefix="%s.%s" % (id, name), ns=ns)
self.logger.debug("innerobj: Innerobject is now %s" % inner_object_def)
self.objects.append(inner_object_def)
return InnerObjectDef(name, inner_object_def)
def _convert_prop_def(self, comp, p, name, ns):
"This function translates object properties into useful collections of information for the container."
#self.logger.debug("Is %s.%s a ref? %s" % (comp.get("id"), p.get("name"), p.find(ns+"ref") is not None or "ref" in p.attrib))
#self.logger.debug("Is %s.%s a value? %s" % (comp.get("id"), p.get("name"), p.find(ns+"value") is not None or "value" in p.attrib))
#self.logger.debug("Is %s.%s an inner object? %s" % (comp.get("id"), p.get("name"), p.find(ns+"object") is not None or "object" in p.attrib))
#self.logger.debug("Is %s.%s a dict? %s" % (comp.get("id"), p.get("name"), p.find(ns+"dict") is not None or "dict" in p.attrib))
#self.logger.debug("Is %s.%s a list? %s" % (comp.get("id"), p.get("name"), p.find(ns+"list") is not None or "list" in p.attrib))
#self.logger.debug("Is %s.%s a tuple? %s" % (comp.get("id"), p.get("name"), p.find(ns+"tuple") is not None or "tuple" in p.attrib))
#self.logger.debug("Is %s.%s a set? %s" % (comp.get("id"), p.get("name"), p.find(ns+"set") is not None or "set" in p.attrib))
#self.logger.debug("Is %s.%s a frozenset? %s" % (comp.get("id"), p.get("name"), p.find(ns+"frozenset") is not None or "frozenset" in p.attrib))
#self.logger.debug("")
if "ref" in p.attrib or p.find(ns+"ref") is not None:
if "ref" in p.attrib:
return self._convert_ref(p.get("ref"), name)
else:
return self._convert_ref(p.find(ns+"ref"), name)
elif "value" in p.attrib or p.find(ns+"value") is not None:
if "value" in p.attrib:
return ValueDef(name, get_string(p.get("value")))
else:
return ValueDef(name, get_string(p.find(ns+"value").text))
elif "dict" in p.attrib or p.find(ns+"dict") is not None:
if "dict" in p.attrib:
return self._convert_dict(p.get("dict"), comp.get("id"), name, ns)
else:
return self._convert_dict(p.find(ns+"dict"), comp.get("id"), name, ns)
elif "props" in p.attrib or p.find(ns+"props") is not None:
if "props" in p.attrib:
return self._convert_props(p.get("props"), name, ns)
else:
return self._convert_props(p.find(ns+"props"), name, ns)
elif "list" in p.attrib or p.find(ns+"list") is not None:
if "list" in p.attrib:
return self._convert_list(p.get("list"), comp.get("id"), name, ns)
else:
return self._convert_list(p.find(ns+"list"), comp.get("id"), name, ns)
elif "tuple" in p.attrib or p.find(ns+"tuple") is not None:
if "tuple" in p.attrib:
return self._convert_tuple(p.get("tuple"), comp.get("id"), name, ns)
else:
return self._convert_tuple(p.find(ns+"tuple"), comp.get("id"), name, ns)
elif "set" in p.attrib or p.find(ns+"set") is not None:
if "set" in p.attrib:
return self._convert_set(p.get("set"), comp.get("id"), name, ns)
else:
return self._convert_set(p.find(ns+"set"), comp.get("id"), name, ns)
elif "frozenset" in p.attrib or p.find(ns+"frozenset") is not None:
if "frozenset" in p.attrib:
return self._convert_frozen_set(p.get("frozenset"), comp.get("id"), name, ns)
else:
return self._convert_frozen_set(p.find(ns+"frozenset"), comp.get("id"), name, ns)
elif "object" in p.attrib or p.find(ns+"object") is not None:
if "object" in p.attrib:
return self._convert_inner_object(p.get("object"), comp.get("id"), name, ns)
else:
return self._convert_inner_object(p.find(ns+"object"), comp.get("id"), name, ns)