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json_schemagen.py
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json_schemagen.py
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#
# Copyright (c) 2016 Juniper Networks, Inc. All rights reserved.
#
import os
import re
import json
class JsonSchemaGenerator(object):
def __init__(self, parser, type_map, identifiers, metadata):
self._parser = parser
self._type_map = type_map
self._top_level_map = {
'SubnetType': self._type_map['SubnetType']
}
self._identifier_map = identifiers
self._metadata_map = metadata
self._type_count = {}
#map which will hold the schema for the types which will be generated below
self._json_type_map = {}
self._objectsList = []
#For mapping the js data type given the ctype or jtype
def _getJSDataType (self,type):
if (type.lower() == "string" or type.lower() == 'std::string') :
return "string"
elif (type.lower() == "integer" or type.lower() == "int") :
return "number"
elif (type.lower() == "number") :
return "number"
elif (type.lower() == "boolean" or type.lower() == "bool") :
return "boolean"
elif (type.lower().startswith("list")) :
return "array"
else :
return "object"
def _convertHyphensToUnderscores(self, str):
return str.replace("-", "_")
def _GenerateJavascriptSchema(self, ident, filename):
file = self._parser.makeFile(filename)
propertiesJSON = {}
#Get the parent type and add to properties
parents = ident.getParents()
parent_types = []
if parents:
for parent in parents:
(parnt, meta) = parent
parent_types.append(parnt.getName())
propertiesJSON["parent_type"] = {"type":"string","required":"required","enum" : parent_types}
identProperties = ident.getProperties()
# First loop through the direct properties and generate the schema
for prop in identProperties :
propMemberInfo = prop._memberinfo
propType = self._getJSDataType(propMemberInfo.ctypename)
xelementType = prop._xelement.type
presence = prop.getPresence()
simple_type = prop.getElement().getSimpleType()
propSchema = {}
if propType == "object" :
if self._json_type_map.get(xelementType):
propSchema = self._json_type_map[xelementType]
subJson = propSchema
else :
subJson = {"type" : propType}
else :
subJson = {"type" : propType}
subJson["required"] = presence
restrictions = None
if simple_type:
restrictions = self._parser.SimpleTypeDict[prop.getElement().getSimpleType()].values
if (restrictions and len(restrictions) > 0):
if(type(restrictions[0]) is dict):
# If it is a dict we assume it to be min max type
subJson["minimum"] = restrictions[0]["minimum"]
subJson["maximum"] = restrictions[1]["maximum"]
else:
# else they are enum
subJson["enum"] = restrictions
try:
subJson["description"] = prop.getDescription()
except ValueError as detail:
pass
propertiesJSON[self._convertHyphensToUnderscores(prop._name)] = subJson
# Now look for the links and generate respective schema, exclude the children (has relationship) objects
for link_info in ident.getLinksInfo():
# link_type = getLinkInfoType(ident, link_info)
if ident.isLinkRef(link_info):
link_to = ident.getLinkTo(link_info)
propertiesJSON[link_to.getCIdentifierName()+"_refs"] = {"type":"array", "url" : "/" + link_to.getName() + "s"}
# Then look for back links and create back_ref schema if required
jsonSchema = {"type":"object", "properties":{ ident._name:{ "type": "object", "properties" : propertiesJSON}}}
file.write(json.dumps(jsonSchema,indent=4))
def _getSubJS (self,type,dataMember):
if (type.lower() == "string" or type.lower() == 'std::string') :
return {"type":"string"}
elif (type.lower() == "integer" or type.lower() == "int" or type.lower() == "number") :
return {"type":"number"}
elif (type.lower() == "boolean" or type.lower() == "bool") :
return {"type":"boolean"}
elif (type.lower().startswith("list")) :
ret = {"type":"array"}
if(dataMember.sequenceType == "std::string"):
ret["items"] = {"type":"string"}
elif(self._type_map.get(dataMember.sequenceType)) :
ret["items"] = self._GenerateTypeMap(self._type_map.get(dataMember.sequenceType))
else:
ret["items"] = {"type":"string"}
return ret
elif (type.lower() == "java.util.date"):
return {"type":"string"}
elif (type.lower() == "long"):
return {"type":"number"}
else :
ret = {}
ret = self._GenerateTypeMap(self._type_map.get(type))
return ret
def _GenerateTypeMap(self,ctype):
self._json_type_map[ctype.getName()] = {"type": "object","properties":{}}
typeDataMembers = ctype._data_members
for dataMember in typeDataMembers:
subJson = self._getSubJS(dataMember.jtypename, dataMember)
if(dataMember.xsd_object.description):
subJson['description'] = dataMember.xsd_object.description
if(dataMember.xsd_object.required):
subJson['required'] = dataMember.xsd_object.required
self._json_type_map[ctype.getName()]["properties"][dataMember.membername] = subJson
return self._json_type_map[ctype.getName()]
def Generate(self, dirname):
if not os.path.exists(dirname):
os.makedirs(dirname)
elif not os.path.isdir(dirname):
print "-o option must specify directory"
sys.exit(1)
for ctype in self._type_map.values():
self._GenerateTypeMap(ctype)
for ident in self._identifier_map.values():
self._objectsList.append(ident._name)
filename = os.path.join(dirname, ident._name + "-schema.json")
self._GenerateJavascriptSchema(ident, filename)
#Generate the file containing the list of all identfiers/objects
objFileName = os.path.join(dirname, "objectList.json")
objFile = self._parser.makeFile(objFileName)
objJson = {"objects":self._objectsList}
objFile.write(json.dumps(objJson,indent=4))
print "Done!"
print "Schemas generated under directory: " + dirname