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ifmap_parser.py
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ifmap_parser.py
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#
# Copyright (c) 2013 Juniper Networks, Inc. All rights reserved.
#
"""
Generate the parsing methods for each metadata message.
For each 'resultItem', the identity elements are decoded and then the
metadata processed.
There are 3 scenarios:
- Properties: the contents of which are stored in the parent identifier;
- Links: create a graph edge;
- Link meta with content: creates an object;
"""
from ifmap_global import GetModuleName
from ifmap_model import IFMapIdentifier, IFMapProperty, IFMapLink, IFMapLinkAttr, SimpleTypeWrapper
from type_parser import TypeParserGenerator
class IFMapGenIdentity(object):
def __init__(self, identifier):
self._identifier = identifier
def getName(self):
return self._identifier.getCppName()
def getElementName(self):
return self._identifier.getName()
def GenerateEncoder(self, file):
cdecl = """
void %(class)s::EncodeUpdate(xml_node *node) const {
""" % {'class': self.getName(), 'element': self.getElementName() }
file.write(cdecl)
for prop in self._identifier.getProperties():
cdecl = """
if (property_set_.test(%(prop_id)s)) {
xml_node p = node->append_child("%(element)s");
""" % {'prop_id': prop.getPropertyId(), 'element': prop.getName()}
file.write(cdecl)
info = prop.getMemberInfo()
assert info
if info.isSequence:
cdecl = """
for (%(ctypename)s::const_iterator iter = %(member)s.begin();
iter != %(member)s.end(); ++iter) {
""" % {'ctypename': info.ctypename, 'member': info.membername}
file.write(cdecl)
indent = ' ' * 12
file.write(indent + 'xml_node s = p.append_child("%s");\n' %
info.xsd_object.getName());
if info.xsd_object.isComplex():
file.write(indent + 'iter->Encode(&s);\n')
else:
if info.sequenceType == 'std::string':
file.write(indent + 's.text().set(iter->c_str());\n')
else:
file.write(indent + 's.text().set(*iter);\n')
indent = ' ' * 8
file.write(indent + '}\n')
elif info.isComplex:
indent = ' ' * 8
file.write(indent + prop.getPropertyName() + '_.Encode(&p);\n')
else:
indent = ' ' * 8
if info.ctypename == 'std::string':
file.write(indent + 'p.text().set(%s.c_str());\n' %
info.membername)
elif info.ctypename == 'bool':
file.write(indent + 'p.text().set(%s);\n' % info.membername)
elif (info.ctypename == 'int' or
info.ctypename == 'uint32_t'):
file.write(indent + 'p.text().set(%s);\n' % info.membername)
elif info.ctypename == 'uint64_t':
cdecl = """
{
ostringstream oss;
oss << %(membername)s;
p.text().set(oss.str().c_str());
}
""" % {'membername': info.membername}
file.write(cdecl)
else:
file.write(indent + '// TODO: unimplemented\n')
indent = ' ' * 4
file.write(indent + '}\n')
file.write('}\n')
def GenerateDecoder(self, file):
cdecl = """
bool %(class)s::Decode(const xml_node &parent, std::string *id_name,
%(class)s *ptr) {
for (xml_node node = parent.first_child(); node;
node = node.next_sibling()) {
if (strcmp(node.name(), "name") == 0) {
*id_name = node.child_value();
}
""" % {'class': self.getName() }
file.write(cdecl)
for prop in self._identifier.getProperties():
indent = ' ' * 8
file.write(indent + 'if (strcmp(node.name(), "%s") == 0) {\n' %
prop.getName())
indent = ' ' * 12
info = prop.getMemberInfo()
assert info
if info.isSequence:
cdecl = """
for (xml_node item = node.first_child(); item;
item = item.next_sibling()) {
if (strcmp(item.name(), "%s") != 0) {
continue;
}
""" % (info.xsd_object.getName())
file.write(cdecl)
if info.xsd_object.isComplex():
cdecl = """
%(type)s var;
var.Clear();
bool success = var.XmlParse(item);
if (!success) {
return false;
}
ptr->%(member)s.push_back(var);
ptr->property_set_.set(%(property)s);
""" % {'type': info.sequenceType, 'member': info.membername, 'property' : prop.getPropertyId()}
file.write(cdecl)
else:
indent = ' ' * 16
if info.sequenceType == 'std::string':
file.write(indent + 'string var(item.child_value());\n')
file.write(indent + 'ptr->%s.push_back(var);\n' %
info.membername)
file.write(indent + 'ptr->property_set_.set(%s);\n' %
prop.getPropertyId())
elif info.sequenceType == 'int':
cdecl = """
int var;
bool success = autogen::ParseInteger(item, &var);
if (!success) {
return false;
}
ptr->%(member)s.push_back(var);
ptr->property_set_.set(%(property)s);
""" % {'member': info.membername, 'property' : prop.getPropertyId() }
file.write(cdecl)
else:
file.write(indent + '// TODO: unimplemented %s \n'
% info.sequenceType)
indent = ' ' * 12
file.write(indent + '}\n')
elif info.isComplex:
cdecl = """
bool success = ptr->%(membername)s_.XmlParse(node);
if (!success) {
return false;
}
ptr->property_set_.set(%(property)s);
""" % {'membername' : prop.getPropertyName(), 'property' : prop.getPropertyId()}
file.write(cdecl)
else:
if info.ctypename == 'std::string':
file.write(indent + 'ptr->%s = node.child_value();\n' %
info.membername)
file.write(indent + 'ptr->property_set_.set(%s);\n' % prop.getPropertyId())
elif info.ctypename == 'bool':
file.write(indent + 'ptr->%s = node.text().as_bool();\n' %
info.membername)
file.write(indent + 'ptr->property_set_.set(%s);\n' % prop.getPropertyId())
elif info.ctypename == 'uint64_t':
fmt = 'if (!autogen::ParseUnsignedLong(node, &ptr->%s)) return false;'
file.write(indent + fmt % info.membername)
file.write(indent + 'ptr->property_set_.set(%s);\n' % prop.getPropertyId())
elif info.ctypename == 'int':
file.write(indent +
'ptr->%s = atoi(node.child_value());\n' %
info.membername)
file.write(indent + 'ptr->property_set_.set(%s);\n' % prop.getPropertyId())
else:
file.write(indent + '// TODO: unimplemented\n')
indent = ' ' * 8
file.write(indent + '}\n')
file.write(' }\n return true;\n}\n')
class IFMapGenProperty(object):
def __init__(self, meta):
self._meta = meta
def GenerateParser(self, DecoderDict, file):
def getMetaParentName(meta):
if meta.getParent() == 'all':
return meta.getCppName() + 'Type'
return meta.getParent().getCppName()
meta = self._meta
fnname = '%s_ParseMetadata' % meta.getCppName()
file.write('bool %s(\n' % fnname)
file.write(' const pugi::xml_node &parent,\n')
file.write(' std::auto_ptr<AutogenProperty > *resultp) {\n')
if meta.getCType():
file.write(' return autogen::%s::XmlParseProperty(parent, resultp);\n' %
meta.getCTypename())
else:
indent = ' ' * 4
info = meta.getMemberInfo()
cdecl = " %s::%s *data =\n" % (getMetaParentName(meta),
SimpleTypeWrapper(info))
file.write(cdecl)
cdecl = " new %s::%s();\n" % (
getMetaParentName(meta), SimpleTypeWrapper(info))
file.write(cdecl)
file.write(" resultp->reset(data);\n");
if info.ctypename == 'std::string':
file.write(indent + 'data->data = parent.child_value();\n')
elif info.ctypename == 'int':
file.write(indent +
'data->data = atoi(parent.child_value());\n')
elif info.ctypename == 'bool':
file.write(indent + 'data->data = parent.text().as_bool();\n');
file.write(indent + 'return true;\n')
file.write('}\n\n')
DecoderDict[meta.getName()] = fnname
def GenerateJsonParser(self, JsonDecoderDict, file):
def getMetaParentName(meta):
if meta.getParent() == 'all':
return meta.getCppName() + 'Type'
return meta.getParent().getCppName()
meta = self._meta
fnname = '%s_ParseJsonMetadata' % meta.getCppName()
file.write('bool %s(\n' % fnname)
file.write(' const contrail_rapidjson::Value &parent,\n')
file.write(' std::auto_ptr<AutogenProperty > *resultp) {\n')
if meta.getCType():
file.write(
' return autogen::%s::JsonParseProperty(parent, resultp);\n' %
meta.getCTypename())
else:
indent = ' ' * 4
info = meta.getMemberInfo()
cdecl = " %s::%s *data =\n" % (
getMetaParentName(meta), SimpleTypeWrapper(info))
file.write(cdecl)
cdecl = " new %s::%s();\n" % (
getMetaParentName(meta), SimpleTypeWrapper(info))
file.write(cdecl)
file.write(" resultp->reset(data);\n");
file.write(" // TODO: get default value from schema\n")
file.write(" if (parent.IsNull()) return true;\n")
if info.ctypename == 'std::string':
file.write(indent + 'if (!autogen::ParseString(parent, &data->data)) return false;\n')
elif info.ctypename == 'int':
file.write(indent + 'if (!autogen::ParseInteger(parent, &data->data)) return false;\n')
elif info.ctypename == 'bool':
file.write(indent + 'if (!autogen::ParseBoolean(parent, &data->data)) return false;\n')
file.write(indent + 'return true;\n')
file.write('}\n\n')
JsonDecoderDict[meta.getJsonName()] = fnname
class IFMapGenLink(object):
def __init__(self, meta):
self._meta = meta
def GenerateParser(self, DecoderDict, file):
fnname = 'ParseLinkMetadata'
DecoderDict[self._meta.getName()] = fnname
def GenerateJsonParser(self, JsonDecoderDict, file):
fnname = 'ParseJsonLinkMetadata'
JsonDecoderDict[self._meta.getJsonName()] = fnname
class IFMapGenLinkAttr(object):
def __init__(self, meta):
self._meta = meta
def GenerateParser(self, DecoderDict, file):
meta = self._meta
if meta.getCType():
fnname = '%s::XmlParseProperty' % meta.getCTypename()
else:
fnname = '%s::ParseMetadata' % meta.getCppName()
DecoderDict[self._meta.getName()] = fnname
if not meta.getCType():
decl = """bool %s::ParseMetadata(const pugi::xml_node &parent,
std::auto_ptr<AutogenProperty> *resultp) {
%sData *var = new %sData();
resultp->reset(var);
""" % (meta.getCppName(), meta.getCppName(), meta.getCppName())
file.write(decl)
xtypename = meta.getCTypename()
if xtypename == 'std::string':
file.write(' var->data = parent.value();\n')
file.write(' return true;\n')
file.write('}\n\n')
def GenerateJsonParser(self, JsonDecoderDict, file):
meta = self._meta
if meta.getCType():
fnname = '%s::JsonParseProperty' % meta.getCTypename()
else:
fnname = '%s::ParseJsonMetadata' % meta.getCppName()
JsonDecoderDict[self._meta.getJsonName()] = fnname
if not meta.getCType():
decl = """
bool %s::ParseJsonMetadata(const contrail_rapidjson::Value &parent,
std::auto_ptr<AutogenProperty> *resultp) {
%sData *data = new %sData();
resultp->reset(data);
""" % (meta.getCppName(), meta.getCppName(), meta.getCppName())
file.write(decl)
xtypename = meta.getCTypename()
if xtypename == 'std::string':
file.write(' std::string var;\n')
file.write(' if (!autogen::ParseString(parent, &var) return false;\n')
file.write(' data->data = var;\n')
file.write(' return true;\n')
file.write('}\n\n')
def GenerateEncoder(self, file):
cdecl = """
void %(class)s::EncodeUpdate(xml_node *node) const {
""" % {'class': self._meta.getCppName(),
'element': self._meta._xelement.getName() }
file.write(cdecl)
# TODO: Simple type encoding
if self._meta._xelement.isComplex():
indent = ' ' * 4
file.write(indent + 'xml_node data = node->append_child("value");\n');
file.write(indent + 'data_.Encode(&data);\n')
file.write('}\n')
def GenerateDecoder(self, file):
cdecl = """
bool %(class)s::Decode(const xml_node &parent, std::string *id_name,
%(class)s *ptr) {
for (xml_node node = parent.first_child(); node;
node = node.next_sibling()) {
if (strcmp(node.name(), "name") == 0) {
*id_name = node.child_value();
}
""" % {'class': self._meta.getCppName() }
file.write(cdecl)
# TODO: Simple type decoding
if self._meta._xelement.isComplex():
cdecl = """
if (strcmp(node.name(), "value") == 0) {
bool success = ptr->data_.XmlParse(node);
if (!success) {
return false;
}
}
"""
file.write(cdecl)
file.write(' }\n return true;\n}\n')
class IFMapParserGenerator(object):
def __init__(self, cTypesDict):
self._cTypesDict = cTypesDict
self._DecoderDict = { }
self._JsonDecoderDict = { }
self._TypeParserGenerator = TypeParserGenerator(None)
def Generate(self, file, hdrname, IdDict, MetaDict):
header = """
#include "%s"
#include "base/autogen_util.h"
namespace autogen {
""" % hdrname
file.write(header)
for ctype in self._cTypesDict.values():
self._TypeParserGenerator.GenerateTypeParser(file, ctype)
self._TypeParserGenerator.GenerateJsonTypeParser(file, ctype)
for ident in IdDict.itervalues():
if not ident._xelement:
# cross-ref'd id from another file
continue
genr = IFMapGenIdentity(ident)
genr.GenerateEncoder(file)
genr.GenerateDecoder(file)
for meta in MetaDict.itervalues():
genr = None
if type(meta) is IFMapProperty:
genr = IFMapGenProperty(meta)
elif type(meta) is IFMapLink:
genr = IFMapGenLink(meta)
elif type(meta) is IFMapLinkAttr:
genr = IFMapGenLinkAttr(meta)
genr.GenerateEncoder(file)
genr.GenerateDecoder(file)
file.write('} // namespace autogen\n')
def GenerateServer(self, file, MetaDict):
cdecl = """
#include <pugixml/pugixml.hpp>
using namespace pugi;
namespace autogen {
"""
file.write(cdecl)
n_links = 0
for meta in MetaDict.itervalues():
genr = None
if type(meta) is IFMapProperty:
genr = IFMapGenProperty(meta)
elif type(meta) is IFMapLink:
genr = IFMapGenLink(meta)
n_links += 1
elif type(meta) is IFMapLinkAttr:
genr = IFMapGenLinkAttr(meta)
if genr:
genr.GenerateParser(self._DecoderDict, file)
genr.GenerateJsonParser(self._JsonDecoderDict, file)
parse_link_decl = """static bool ParseLinkMetadata(const xml_node &parent,
std::auto_ptr<AutogenProperty> *resultp) {
return true;
}
static bool ParseJsonLinkMetadata(const contrail_rapidjson::Value &parent,
std::auto_ptr<AutogenProperty> *resultp) {
return true;
}
"""
if n_links > 0:
file.write(parse_link_decl)
file.write('} // namespace autogen\n\n')
module_name = GetModuleName(file, '_server.cc')
file.write('void %s_ParserInit(IFMapServerParser *xparser) {\n' %
module_name)
indent = ' ' * 4
for kvp in self._DecoderDict.iteritems():
fmt = 'xparser->MetadataRegister("%s",\n'
file.write(indent + fmt % kvp[0])
indent1 = ' ' * 8
fmt = '&autogen::%s);\n'
file.write(indent1 + fmt % kvp[1])
file.write('}\n')
file.write('\n')
module_name = GetModuleName(file, '_server.cc')
file.write('void %s_JsonParserInit(ConfigJsonParser *jparser) {\n' %
module_name)
indent = ' ' * 4
for kvp in self._JsonDecoderDict.iteritems():
fmt = 'jparser->MetadataRegister("%s",\n'
file.write(indent + fmt % kvp[0])
indent1 = ' ' * 8
fmt = '&autogen::%s);\n'
file.write(indent1 + fmt % kvp[1])
file.write('}\n')
def GenerateAgent(self, file, IdDict, MetaDict):
cdecl = """
#include <pugixml/pugixml.hpp>
using namespace autogen;
using namespace pugi;
"""
file.write(cdecl)
module_name = GetModuleName(file, '_agent.cc')
for ident in IdDict.itervalues():
if not ident._xelement:
# cross-ref'd id from another file
continue
cdecl = """
IFMapObject* %(class)sAgentParse(xml_node &node, DB *db, std::string *id_name) {
IFMapAgentTable *table = static_cast<IFMapAgentTable *>
(IFMapTable::FindTable(db, "%(nodename)s"));
if (!table) {
return NULL;
}
%(class)s *data = static_cast<%(class)s *>(table->AllocObject());
if (%(class)s::Decode(node, id_name, data) == false) {
delete data;
return NULL;
};
return data;
}
""" % {'class': ident.getCppName(), 'nodename': ident.getName() }
file.write (cdecl)
for ident in MetaDict.itervalues():
if not type(ident) is IFMapLinkAttr:
continue
cdecl = """
IFMapObject* %(class)sAgentParse(xml_node &node, DB *db, std::string *id_name) {
IFMapAgentTable *table = static_cast<IFMapAgentTable *>
(IFMapTable::FindTable(db, "%(nodename)s"));
if (!table) {
return NULL;
}
%(class)s *data = static_cast<%(class)s *>(table->AllocObject());
if (%(class)s::Decode(node, id_name, data) == false) {
return NULL;
};
return data;
}
""" % {'class': ident.getCppName(), 'nodename': ident.getName() }
file.write (cdecl)
file.write('void %s_Agent_ParserInit(DB *db, IFMapAgentParser *xparser) {\n' %
module_name)
indent = ' ' * 4
for ident in IdDict.itervalues():
if not ident._xelement:
# cross-ref'd id from another file
continue
file.write(indent)
fmt = 'xparser->NodeRegister("%s", &%sAgentParse);\n'
file.write(fmt % (ident.getName(),ident.getCppName()))
for ident in MetaDict.itervalues():
if not type(ident) is IFMapLinkAttr:
continue
indent = ' ' * 4
file.write(indent)
fmt = 'xparser->NodeRegister("%s", &%sAgentParse);\n'
file.write(fmt % (ident.getName(),ident.getCppName()))
file.write('}\n')