Add wider support to json_schema_compiler

tools/json_schema_compiler/model.py

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import os.path
 import re
 import copy
 
 class Model(object):
   """Model of all namespaces that comprise an API.
@@ skipping 42 matching lines @@
         function = Function(function_json)
         self.functions[function.name] = function
 
 class Type(object):
   """A Type defined in the json.
 
   Properties:
   - |name| the type name
   - |description| the description of the type (if provided)
   - |properties| a map of property names to their model.Property
+  - |from_client| indicates that instances of the Type can originate from the
+    users of generated code, such as top-level types and function results
+  - |from_json| indicates that instances of the Type can originate from the
+    JSON (as described by the schema), such as top-level types and function
+    parameters
   """
   def __init__(self, json):
     self.name = json['id']
     self.description = json.get('description')
+    self.from_json = True
+    self.from_client = True
     self.properties = {}
     for prop_name, prop_json in json['properties'].items():
-      self.properties[prop_name] = Property(prop_name, prop_json)
+      self.properties[prop_name] = Property(prop_name, prop_json,
+          from_json=True,
+          from_client=True)
 
 class Callback(object):
   """A callback parameter to a Function.
 
   Properties:
   - |params| the parameters to this callback.
   """
   def __init__(self, json):
     params = json['parameters']
     self.params = []
     if len(params) == 0:
       return
     elif len(params) == 1:
       param = params[0]
-      self.params.append(Property(param['name'], param))
+      self.params.append(Property(param['name'], param,
+          from_client=True))
     else:
       raise AssertionError("Callbacks can have at most a single parameter")
 
 class Function(object):
   """A Function defined in the API.
 
   Properties:
   - |name| the function name
   - |params| a list of parameters to the function (order matters). A separate
     parameter is used for each choice of a 'choices' parameter.
   - |description| a description of the function (if provided)
   - |callback| the callback parameter to the function. There should be exactly
     one
   """
   def __init__(self, json):
     self.name = json['name']
     self.params = []
     self.description = json['description']
     self.callback = None
     for param in json['parameters']:
       if param.get('type') == 'function':
         assert (not self.callback), self.name + " has more than one callback"
         self.callback = Callback(param)
       else:
-        self.params.append(Property(param['name'], param))
-    assert (self.callback), self.name + " does not support callback"
+        self.params.append(Property(param['name'], param,
+            from_json=True))
 
 class Property(object):
   """A property of a type OR a parameter to a function.
 
   Properties:
   - |name| name of the property as in the json. This shouldn't change since
     it is the key used to access DictionaryValues
   - |unix_name| the unix_style_name of the property. Used as variable name
   - |optional| a boolean representing whether the property is optional
   - |description| a description of the property (if provided)
   - |type_| the model.PropertyType of this property
   - |ref_type| the type that the REF property is referencing. Can be used to
     map to its model.Type
   - |item_type| a model.Property representing the type of each element in an
     ARRAY
   - |properties| the properties of an OBJECT parameter
   """
-  def __init__(self, name, json):
-    if not re.match('^[a-z][a-zA-Z0-9]*$', name):
-      raise AssertionError('Name %s must be lowerCamelCase' % name)
+  def __init__(self, name, json,
+      from_json=False,
+      from_client=False):
+    """
+    Parameters:
+    - |from_json| indicates that instances of the Type can originate from the
+      JSON (as described by the schema), such as top-level types and function
+      parameters
+    - |from_client| indicates that instances of the Type can originate from the
+      users of generated code, such as top-level types and function results
+    """
     self.name = name
     self._unix_name = _UnixName(self.name)
     self._unix_name_used = False
     self.optional = json.get('optional', False)
     self.description = json.get('description')
     if '$ref' in json:
       self.ref_type = json['$ref']
       self.type_ = PropertyType.REF
     elif 'enum' in json:
       self.enum_values = []
       for value in json['enum']:
         self.enum_values.append(value)
       self.type_ = PropertyType.ENUM
     elif 'type' in json:
       json_type = json['type']
       if json_type == 'string':
         self.type_ = PropertyType.STRING
       elif json_type == 'any':
         self.type_ = PropertyType.ANY
       elif json_type == 'boolean':
         self.type_ = PropertyType.BOOLEAN
       elif json_type == 'integer':
         self.type_ = PropertyType.INTEGER
       elif json_type == 'number':
         self.type_ = PropertyType.DOUBLE
       elif json_type == 'array':
-        self.item_type = Property(name + "Element", json['items'])
+        self.item_type = Property(name + "Element", json['items'],
+            from_json,
+            from_client)
         self.type_ = PropertyType.ARRAY
       elif json_type == 'object':
+        self.type_ = PropertyType.OBJECT
+        # These members are read when this OBJECT Property is used as a Type
         self.properties = {}
-        self.type_ = PropertyType.OBJECT
-        for key, val in json['properties'].items():
-          self.properties[key] = Property(key, val)
+        self.from_json = from_json
+        self.from_client = from_client
+        for key, val in json.get('properties', {}).items():
+          self.properties[key] = Property(key, val,
+              from_json,
+              from_client)
       else:
         raise NotImplementedError(json_type)
     elif 'choices' in json:
       assert len(json['choices']), 'Choices has no choices\n%s' % json
       self.choices = {}
       self.type_ = PropertyType.CHOICES
       for choice_json in json['choices']:
-        choice = Property(self.name, choice_json)
+        choice = Property(self.name, choice_json,
+            from_json,
+            from_client)
         # A choice gets its unix_name set in
         # cpp_type_generator.GetExpandedChoicesInParams
         choice._unix_name = None
         # The existence of any single choice is optional
         choice.optional = True
         self.choices[choice.type_] = choice
     else:
       raise NotImplementedError(json)
 
   def GetUnixName(self):
@@ skipping 48 matching lines @@
   CHOICES = _Info(False, "CHOICES")
   OBJECT = _Info(False, "OBJECT")
   ANY = _Info(False, "ANY")
 
 def _UnixName(name):
   """Returns the unix_style name for a given lowerCamelCase string.
   """
   return '_'.join([x.lower()
       for x in re.findall('[A-Z][a-z_]*', name[0].upper() + name[1:])])