Remove the dependency on json schema compiler.

tools/json_schema_compiler/dart_generator.py

Index: tools/json_schema_compiler/dart_generator.py
diff --git a/tools/json_schema_compiler/dart_generator.py b/tools/json_schema_compiler/dart_generator.py
deleted file mode 100644
index a9ba0d6ee81193aab1a810ca38d47ba1817899cd..0000000000000000000000000000000000000000
--- a/tools/json_schema_compiler/dart_generator.py
+++ /dev/null
@@ -1,763 +0,0 @@
-# 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.
-"""
-Generator language component for compiler.py that adds Dart language support.
-"""
-
-from code import Code
-from model import Function, PropertyType
-from schema_util import StripNamespace
-
-import os
-from datetime import datetime
-
-LICENSE = (
-"""// Copyright (c) %s, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.""" %
-    datetime.now().year)
-
-class DartGenerator(object):
-  def __init__(self, dart_overrides_dir=None):
-    self._dart_overrides_dir = dart_overrides_dir
-
-  def Generate(self, namespace):
-    return _Generator(namespace, self._dart_overrides_dir).Generate()
-
-
-class _Generator(object):
-  """A .dart generator for a namespace.
-  """
-
-  def __init__(self, namespace, dart_overrides_dir=None):
-    self._namespace = namespace
-    # TODO(sashab): Once inline type definitions start being added to
-    # self._types, make a _FindType(self, type_) function that looks at
-    # self._namespace.types.
-    self._types = namespace.types
-
-    # Build a dictionary of Type Name --> Custom Dart code.
-    self._type_overrides = {}
-    if dart_overrides_dir is not None:
-      for filename in os.listdir(dart_overrides_dir):
-        if filename.startswith(namespace.unix_name):
-          with open(os.path.join(dart_overrides_dir, filename)) as f:
-            # Split off the namespace and file extension, leaving just the type.
-            type_path = '.'.join(filename.split('.')[1:-1])
-            self._type_overrides[type_path] = f.read()
-
-    # TODO(sashab): Add all inline type definitions to the global Types
-    # dictionary here, so they have proper names, and are implemented along with
-    # all other types. Also update the parameters/members with these types
-    # to reference these new types instead.
-
-  def Generate(self):
-    """Generates a Code object with the .dart for the entire namespace.
-    """
-    c = Code()
-    (c.Append(LICENSE)
-      .Append()
-      .Append('// Generated from namespace: %s' % self._namespace.name)
-      .Append()
-      .Append('part of chrome;'))
-
-    if self._types:
-      (c.Append()
-        .Append('/**')
-        .Append(' * Types')
-        .Append(' */')
-        .Append()
-      )
-    for type_ in self._types.values():
-      # Check for custom dart for this whole type.
-      override = self._GetOverride([type_.name], document_with=type_)
-      c.Cblock(override if override is not None else self._GenerateType(type_))
-
-    if self._namespace.events:
-      (c.Append('/**')
-        .Append(' * Events')
-        .Append(' */')
-        .Append()
-      )
-    for event_name in self._namespace.events:
-      c.Cblock(self._GenerateEvent(self._namespace.events[event_name]))
-
-    (c.Append('/**')
-      .Append(' * Functions')
-      .Append(' */')
-      .Append()
-    )
-    c.Cblock(self._GenerateMainClass())
-
-    return c
-
-  def _GenerateType(self, type_):
-    """Given a Type object, returns the Code with the .dart for this
-    type's definition.
-
-    Assumes this type is a Parameter Type (creatable by user), and creates an
-    object that extends ChromeObject. All parameters are specifiable as named
-    arguments in the constructor, and all methods are wrapped with getters and
-    setters that hide the JS() implementation.
-    """
-    c = Code()
-
-    # Since enums are just treated as strings for now, don't generate their
-    # type.
-    # TODO(sashab): Find a nice way to wrap enum objects.
-    if type_.property_type is PropertyType.ENUM:
-      return c
-
-    (c.Concat(self._GenerateDocumentation(type_))
-      .Sblock('class %(type_name)s extends ChromeObject {')
-    )
-
-    # Check whether this type has function members. If it does, don't allow
-    # public construction.
-    add_public_constructor = all(not self._IsFunction(p.type_)
-                                 for p in type_.properties.values())
-    constructor_fields = [self._GeneratePropertySignature(p)
-                          for p in type_.properties.values()]
-
-    if add_public_constructor:
-      (c.Append('/*')
-        .Append(' * Public constructor')
-        .Append(' */')
-        .Sblock('%(type_name)s({%(constructor_fields)s}) {')
-      )
-
-      for prop_name in type_.properties:
-        (c.Sblock('if (%s != null)' % prop_name)
-          .Append('this.%s = %s;' % (prop_name, prop_name))
-          .Eblock()
-        )
-      (c.Eblock('}')
-        .Append()
-      )
-
-    (c.Append('/*')
-      .Append(' * Private constructor')
-      .Append(' */')
-      .Append('%(type_name)s._proxy(_jsObject) : super._proxy(_jsObject);')
-    )
-
-    # Add an accessor (getter & setter) for each property.
-    properties = [p for p in type_.properties.values()
-                  if not self._IsFunction(p.type_)]
-    if properties:
-      (c.Append()
-        .Append('/*')
-        .Append(' * Public accessors')
-        .Append(' */')
-      )
-    for prop in properties:
-      override = self._GetOverride([type_.name, prop.name], document_with=prop)
-      c.Concat(override if override is not None
-               else self._GenerateGetterAndSetter(type_, prop))
-
-    # Now add all the methods.
-    methods = [t for t in type_.properties.values()
-               if self._IsFunction(t.type_)]
-    if methods:
-      (c.Append()
-        .Append('/*')
-        .Append(' * Methods')
-        .Append(' */')
-      )
-    for prop in methods:
-      # Check if there's an override for this method.
-      override = self._GetOverride([type_.name, prop.name], document_with=prop)
-      c.Cblock(override if override is not None
-               else self._GenerateFunction(prop.type_.function))
-
-    (c.Eblock('}')
-      .Substitute({
-        'type_name': self._AddPrefix(type_.simple_name),
-        'constructor_fields': ', '.join(constructor_fields)
-      })
-    )
-
-    return c
-
-  def _GenerateGetterAndSetter(self, type_, prop):
-    """Given a Type and Property, returns the Code object for the getter and
-    setter for that property.
-    """
-    c = Code()
-    override = self._GetOverride([type_.name, prop.name, '.get'],
-                                 document_with=prop)
-    c.Cblock(override if override is not None
-             else self._GenerateGetter(type_, prop))
-    override = self._GetOverride([type_.name, prop.name, '.set'])
-    c.Cblock(override if override is not None
-             else self._GenerateSetter(type_, prop))
-    return c
-
-  def _GenerateGetter(self, type_, prop):
-    """Given a Type and Property, returns the Code object for the getter for
-    that property.
-
-    Also adds the documentation for this property before the method.
-    """
-    c = Code()
-    c.Concat(self._GenerateDocumentation(prop))
-
-    type_name = self._GetDartType(prop.type_)
-    if (self._IsBaseType(prop.type_)):
-      c.Append("%s get %s => JS('%s', '#.%s', this._jsObject);" %
-          (type_name, prop.name, type_name, prop.name))
-    elif self._IsSerializableObjectType(prop.type_):
-      c.Append("%s get %s => new %s._proxy(JS('', '#.%s', "
-               "this._jsObject));" %
-          (type_name, prop.name, type_name, prop.name))
-    elif self._IsListOfSerializableObjects(prop.type_):
-      (c.Sblock('%s get %s {' % (type_name, prop.name))
-        .Append('%s __proxy_%s = new %s();' % (type_name, prop.name,
-                                               type_name))
-        .Append("int count = JS('int', '#.%s.length', this._jsObject);" %
-            prop.name)
-        .Sblock("for (int i = 0; i < count; i++) {")
-        .Append("var item = JS('', '#.%s[#]', this._jsObject, i);" % prop.name)
-        .Append('__proxy_%s.add(new %s._proxy(item));' % (prop.name,
-            self._GetDartType(prop.type_.item_type)))
-        .Eblock('}')
-        .Append('return __proxy_%s;' % prop.name)
-        .Eblock('}')
-      )
-    elif self._IsObjectType(prop.type_):
-      # TODO(sashab): Think of a way to serialize generic Dart objects.
-      if type_name in self._types:
-        c.Append("%s get %s => new %s._proxy(JS('%s', '#.%s', "
-                 "this._jsObject));" %
-            (type_name, prop.name, type_name, type_name, prop.name))
-      else:
-        c.Append("%s get %s => JS('%s', '#.%s', this._jsObject);" %
-            (type_name, prop.name, type_name, prop.name))
-    else:
-      raise Exception(
-          "Could not generate wrapper for %s.%s: unserializable type %s" %
-          (type_.name, prop.name, type_name)
-      )
-    return c
-
-  def _GenerateSetter(self, type_, prop):
-    """Given a Type and Property, returns the Code object for the setter for
-    that property.
-    """
-    c = Code()
-    type_name = self._GetDartType(prop.type_)
-    wrapped_name = prop.name
-    if not self._IsBaseType(prop.type_):
-      wrapped_name = 'convertArgument(%s)' % prop.name
-
-    (c.Sblock("void set %s(%s %s) {" % (prop.name, type_name, prop.name))
-      .Append("JS('void', '#.%s = #', this._jsObject, %s);" %
-        (prop.name, wrapped_name))
-      .Eblock("}")
-    )
-    return c
-
-  def _GenerateDocumentation(self, prop):
-    """Given an object, generates the documentation for this object (as a
-    code string) and returns the Code object.
-
-    Returns an empty code object if the object has no documentation.
-
-    Uses triple-quotes for the string.
-    """
-    c = Code()
-    if prop.description is not None:
-      for line in prop.description.split('\n'):
-        c.Comment(line, comment_prefix='/// ')
-    return c
-
-  def _GenerateFunction(self, f):
-    """Returns the Code object for the given function.
-    """
-    c = Code()
-    c.Concat(self._GenerateDocumentation(f))
-
-    if not self._NeedsProxiedCallback(f):
-      c.Append("%s => %s;" % (self._GenerateFunctionSignature(f),
-                              self._GenerateProxyCall(f)))
-      return c
-
-    (c.Sblock("%s {" % self._GenerateFunctionSignature(f))
-      .Concat(self._GenerateProxiedFunction(f.callback, f.callback.name))
-      .Append('%s;' % self._GenerateProxyCall(f))
-      .Eblock('}')
-    )
-
-    return c
-
-  def _GenerateProxiedFunction(self, f, callback_name):
-    """Given a function (assumed to be a callback), generates the proxied
-    version of this function, which calls |callback_name| if it is defined.
-
-    Returns a Code object.
-    """
-    c = Code()
-    proxied_params = []
-    # A list of Properties, containing List<*> objects that need proxying for
-    # their members (by copying out each member and proxying it).
-    lists_to_proxy = []
-    for p in f.params:
-      if self._IsBaseType(p.type_):
-        proxied_params.append(p.name)
-      elif self._IsSerializableObjectType(p.type_):
-        proxied_params.append('new %s._proxy(%s)' % (
-            self._GetDartType(p.type_), p.name))
-      elif self._IsListOfSerializableObjects(p.type_):
-        proxied_params.append('__proxy_%s' % p.name)
-        lists_to_proxy.append(p)
-      elif self._IsObjectType(p.type_):
-        # TODO(sashab): Find a way to build generic JS objects back in Dart.
-        proxied_params.append('%s' % p.name)
-      elif p.type_.property_type is PropertyType.ARRAY:
-        # TODO(sashab): This might be okay - what if this is a list of
-        # FileEntry elements? In this case, a basic list will proxy the objects
-        # fine.
-        proxied_params.append('%s' % p.name)
-      else:
-        raise Exception(
-            "Cannot automatically create proxy; can't wrap %s, type %s" % (
-                self._GenerateFunctionSignature(f), self._GetDartType(p.type_)))
-
-    (c.Sblock("void __proxy_callback(%s) {" % ', '.join(p.name for p in
-                                               f.params))
-      .Sblock('if (%s != null) {' % callback_name)
-    )
-
-    # Add the proxied lists.
-    for list_to_proxy in lists_to_proxy:
-      (c.Append("%s __proxy_%s = new %s();" % (
-                    self._GetDartType(list_to_proxy.type_),
-                    list_to_proxy.name,
-                    self._GetDartType(list_to_proxy.type_)))
-        .Sblock("for (var o in %s) {" % list_to_proxy.name)
-        .Append('__proxy_%s.add(new %s._proxy(o));' % (list_to_proxy.name,
-            self._GetDartType(list_to_proxy.type_.item_type)))
-        .Eblock("}")
-      )
-
-    (c.Append("%s(%s);" % (callback_name, ', '.join(proxied_params)))
-      .Eblock('}')
-      .Eblock('}')
-    )
-    return c
-
-  def _NeedsProxiedCallback(self, f):
-    """Given a function, returns True if this function's callback needs to be
-    proxied, False if not.
-
-    Function callbacks need to be proxied if they have at least one
-    non-base-type parameter.
-    """
-    return f.callback and self._NeedsProxy(f.callback)
-
-  def _NeedsProxy(self, f):
-    """Given a function, returns True if it needs to be proxied, False if not.
-
-    A function needs to be proxied if any of its members are non-base types.
-    This means that, when the function object is passed to Javascript, it
-    needs to be wrapped in a "proxied" call that converts the JS inputs to Dart
-    objects explicitly, before calling the real function with these new objects.
-    """
-    return any(not self._IsBaseType(p.type_) for p in f.params)
-
-  def _GenerateProxyCall(self, function, call_target='this._jsObject'):
-    """Given a function, generates the code to call that function via JS().
-    Returns a string.
-
-    |call_target| is the name of the object to call the function on. The default
-    is this._jsObject.
-
-    e.g.
-        JS('void', '#.resizeTo(#, #)', this._jsObject, width, height)
-        JS('void', '#.setBounds(#)', this._jsObject, convertArgument(bounds))
-    """
-    n_params = len(function.params)
-    if function.callback:
-      n_params += 1
-
-    return_type_str = self._GetDartType(function.returns)
-    params = []
-
-    # If this object is serializable, don't convert the type from JS - pass the
-    # JS object straight into the proxy.
-    if self._IsSerializableObjectType(function.returns):
-      params.append("''")
-    else:
-      params.append("'%s'" % return_type_str)
-
-    params.append("'#.%s(%s)'" % (function.name, ', '.join(['#'] * n_params)))
-    params.append(call_target)
-
-    for param in function.params:
-      if not self._IsBaseType(param.type_):
-        params.append('convertArgument(%s)' % param.name)
-      else:
-        params.append(param.name)
-    if function.callback:
-      # If this isn't a base type, we need a proxied callback.
-      callback_name = function.callback.name
-      if self._NeedsProxiedCallback(function):
-        callback_name = "__proxy_callback"
-      params.append('convertDartClosureToJS(%s, %s)' % (callback_name,
-                    len(function.callback.params)))
-
-    # If the object is serializable, call the proxy constructor for this type.
-    proxy_call = 'JS(%s)' % ', '.join(params)
-    if self._IsSerializableObjectType(function.returns):
-      proxy_call = 'new %s._proxy(%s)' % (return_type_str, proxy_call)
-
-    return proxy_call
-
-  def _GenerateEvent(self, event):
-    """Given a Function object, returns the Code with the .dart for this event,
-    represented by the function.
-
-    All events extend the Event base type.
-    """
-    c = Code()
-
-    # Add documentation for this event.
-    (c.Concat(self._GenerateDocumentation(event))
-      .Sblock('class Event_%(event_name)s extends Event {')
-    )
-
-    # If this event needs a proxy, all calls need to be proxied.
-    needs_proxy = self._NeedsProxy(event)
-
-    # Override Event callback type definitions.
-    for ret_type, event_func in (('void', 'addListener'),
-                                 ('void', 'removeListener'),
-                                 ('bool', 'hasListener')):
-      param_list = self._GenerateParameterList(event.params, event.callback,
-                                               convert_optional=True)
-      if needs_proxy:
-        (c.Sblock('%s %s(void callback(%s)) {' % (ret_type, event_func,
-                                                 param_list))
-          .Concat(self._GenerateProxiedFunction(event, 'callback'))
-          .Append('super.%s(__proxy_callback);' % event_func)
-          .Eblock('}')
-        )
-      else:
-        c.Append('%s %s(void callback(%s)) => super.%s(callback);' %
-            (ret_type, event_func, param_list, event_func))
-      c.Append()
-
-    # Generate the constructor.
-    (c.Append('Event_%(event_name)s(jsObject) : '
-              'super._(jsObject, %(param_num)d);')
-      .Eblock('}')
-      .Substitute({
-        'event_name': self._namespace.unix_name + '_' + event.name,
-        'param_num': len(event.params)
-      })
-    )
-
-    return c
-
-  def _GenerateMainClass(self):
-    """Generates the main class for this file, which links to all functions
-    and events.
-
-    Returns a code object.
-    """
-    c = Code()
-    (c.Sblock('class API_%s {' % self._namespace.unix_name)
-      .Append('/*')
-      .Append(' * API connection')
-      .Append(' */')
-      .Append('Object _jsObject;')
-    )
-
-    # Add events.
-    if self._namespace.events:
-      (c.Append()
-        .Append('/*')
-        .Append(' * Events')
-        .Append(' */')
-      )
-    for event_name in self._namespace.events:
-      c.Append('Event_%s_%s %s;' % (self._namespace.unix_name, event_name,
-                                    event_name))
-
-    # Add functions.
-    if self._namespace.functions:
-      (c.Append()
-        .Append('/*')
-        .Append(' * Functions')
-        .Append(' */')
-      )
-    for function in self._namespace.functions.values():
-      # Check for custom dart for this whole property.
-      override = self._GetOverride([function.name], document_with=function)
-      c.Cblock(override if override is not None
-               else self._GenerateFunction(function))
-
-    # Add the constructor.
-    c.Sblock('API_%s(this._jsObject) {' % self._namespace.unix_name)
-
-    # Add events to constructor.
-    for event_name in self._namespace.events:
-      c.Append("%s = new Event_%s_%s(JS('', '#.%s', this._jsObject));" %
-        (event_name, self._namespace.unix_name, event_name, event_name))
-
-    (c.Eblock('}')
-      .Eblock('}')
-    )
-    return c
-
-  def _GeneratePropertySignature(self, prop):
-    """Given a property, returns a signature for that property.
-    Recursively generates the signature for callbacks.
-    Returns a String for the given property.
-
-    e.g.
-      bool x
-      void onClosed()
-      void doSomething(bool x, void callback([String x]))
-    """
-    if self._IsFunction(prop.type_):
-      return self._GenerateFunctionSignature(prop.type_.function)
-    return '%(type)s %(name)s' % {
-               'type': self._GetDartType(prop.type_),
-               'name': prop.simple_name
-           }
-
-  def _GenerateFunctionSignature(self, function, convert_optional=False):
-    """Given a function object, returns the signature for that function.
-    Recursively generates the signature for callbacks.
-    Returns a String for the given function.
-
-    If convert_optional is True, changes optional parameters to be required.
-
-    e.g.
-      void onClosed()
-      bool isOpen([String type])
-      void doSomething(bool x, void callback([String x]))
-    """
-    sig = '%(return_type)s %(name)s(%(params)s)'
-
-    if function.returns:
-      return_type = self._GetDartType(function.returns)
-    else:
-      return_type = 'void'
-
-    return sig % {
-        'return_type': return_type,
-        'name': function.simple_name,
-        'params': self._GenerateParameterList(function.params,
-                                              function.callback,
-                                              convert_optional=convert_optional)
-    }
-
-  def _GenerateParameterList(self,
-                             params,
-                             callback=None,
-                             convert_optional=False):
-    """Given a list of function parameters, generates their signature (as a
-    string).
-
-    e.g.
-      [String type]
-      bool x, void callback([String x])
-
-    If convert_optional is True, changes optional parameters to be required.
-    Useful for callbacks, where optional parameters are treated as required.
-    """
-    # Params lists (required & optional), to be joined with commas.
-    # TODO(sashab): Don't assume optional params always come after required
-    # ones.
-    params_req = []
-    params_opt = []
-    for param in params:
-      p_sig = self._GeneratePropertySignature(param)
-      if param.optional and not convert_optional:
-        params_opt.append(p_sig)
-      else:
-        params_req.append(p_sig)
-
-    # Add the callback, if it exists.
-    if callback:
-      c_sig = self._GenerateFunctionSignature(callback, convert_optional=True)
-      if callback.optional:
-        params_opt.append(c_sig)
-      else:
-        params_req.append(c_sig)
-
-    # Join the parameters with commas.
-    # Optional parameters have to be in square brackets, e.g.:
-    #
-    #  required params | optional params |     output
-    #        []        |        []       |       ''
-    #      [x, y]      |        []       |     'x, y'
-    #        []        |      [a, b]     |    '[a, b]'
-    #      [x, y]      |      [a, b]     | 'x, y, [a, b]'
-    if params_opt:
-      params_opt[0] = '[%s' % params_opt[0]
-      params_opt[-1] = '%s]' % params_opt[-1]
-    param_sets = [', '.join(params_req), ', '.join(params_opt)]
-
-    # The 'if p' part here is needed to prevent commas where there are no
-    # parameters of a certain type.
-    # If there are no optional parameters, this prevents a _trailing_ comma,
-    # e.g. '(x, y,)'. Similarly, if there are no required parameters, this
-    # prevents a leading comma, e.g. '(, [a, b])'.
-    return ', '.join(p for p in param_sets if p)
-
-  def _GetOverride(self, key_chain, document_with=None):
-    """Given a list of keys, joins them with periods and searches for them in
-    the custom dart overrides.
-    If there is an override for that key, finds the override code and returns
-    the Code object. If not, returns None.
-
-    If document_with is not None, adds the documentation for this property
-    before the override code.
-    """
-    c = Code()
-    contents = self._type_overrides.get('.'.join(key_chain))
-    if contents is None:
-      return None
-
-    if document_with is not None:
-      c.Concat(self._GenerateDocumentation(document_with))
-    for line in contents.strip('\n').split('\n'):
-      c.Append(line)
-    return c
-
-  def _AddPrefix(self, name):
-    """Given the name of a type, prefixes the namespace (as camelcase) and
-    returns the new name.
-    """
-    # TODO(sashab): Split the dart library into multiple files, avoiding the
-    # need for this prefixing.
-    return ('%s%s' % (
-        ''.join(s.capitalize() for s in self._namespace.name.split('.')),
-        name))
-
-  def _IsFunction(self, type_):
-    """Given a model.Type, returns whether this type is a function.
-    """
-    return type_.property_type == PropertyType.FUNCTION
-
-  def _IsSerializableObjectType(self, type_):
-    """Given a model.Type, returns whether this type is a serializable object.
-    Serializable objects are custom types defined in this namespace.
-
-    If this object is a reference to something not in this namespace, assumes
-    its a serializable object.
-    """
-    if type_ is None:
-      return False
-    if type_.property_type is PropertyType.CHOICES:
-      return all(self._IsSerializableObjectType(c) for c in type_.choices)
-    if type_.property_type is PropertyType.REF:
-      if type_.ref_type in self._types:
-        return self._IsObjectType(self._types[type_.ref_type])
-      return True
-    if (type_.property_type == PropertyType.OBJECT
-        and type_.instance_of in self._types):
-      return self._IsObjectType(self._types[type_.instance_of])
-    return False
-
-  def _IsObjectType(self, type_):
-    """Given a model.Type, returns whether this type is an object.
-    """
-    return (self._IsSerializableObjectType(type_)
-            or type_.property_type in [PropertyType.OBJECT, PropertyType.ANY])
-
-  def _IsListOfSerializableObjects(self, type_):
-    """Given a model.Type, returns whether this type is a list of serializable
-    objects (or regular objects, if this list is treated as a type - in this
-    case, the item type was defined inline).
-
-    If this type is a reference to something not in this namespace, assumes
-    it is not a list of serializable objects.
-    """
-    if type_.property_type is PropertyType.CHOICES:
-      return all(self._IsListOfSerializableObjects(c) for c in type_.choices)
-    if type_.property_type is PropertyType.REF:
-      if type_.ref_type in self._types:
-        return self._IsListOfSerializableObjects(self._types[type_.ref_type])
-      return False
-    return (type_.property_type is PropertyType.ARRAY and
-        (self._IsSerializableObjectType(type_.item_type)))
-
-  def _IsListOfBaseTypes(self, type_):
-    """Given a model.Type, returns whether this type is a list of base type
-    objects (PropertyType.REF types).
-    """
-    if type_.property_type is PropertyType.CHOICES:
-      return all(self._IsListOfBaseTypes(c) for c in type_.choices)
-    return (type_.property_type is PropertyType.ARRAY and
-            self._IsBaseType(type_.item_type))
-
-  def _IsBaseType(self, type_):
-    """Given a model.type_, returns whether this type is a base type
-    (string, number, boolean, or a list of these).
-
-    If type_ is a Choices object, returns True if all possible choices are base
-    types.
-    """
-    # TODO(sashab): Remove 'Choices' as a base type once they are wrapped in
-    # native Dart classes.
-    if type_.property_type is PropertyType.CHOICES:
-      return all(self._IsBaseType(c) for c in type_.choices)
-    return (
-        (self._GetDartType(type_) in ['bool', 'num', 'int', 'double', 'String'])
-        or (type_.property_type is PropertyType.ARRAY
-            and self._IsBaseType(type_.item_type))
-    )
-
-  def _GetDartType(self, type_):
-    """Given a model.Type object, returns its type as a Dart string.
-    """
-    if type_ is None:
-      return 'void'
-
-    prop_type = type_.property_type
-    if prop_type is PropertyType.REF:
-      if type_.ref_type in self._types:
-        return self._GetDartType(self._types[type_.ref_type])
-      # TODO(sashab): If the type is foreign, it might have to be imported.
-      return StripNamespace(type_.ref_type)
-    elif prop_type is PropertyType.BOOLEAN:
-      return 'bool'
-    elif prop_type is PropertyType.INTEGER:
-      return 'int'
-    elif prop_type is PropertyType.INT64:
-      return 'num'
-    elif prop_type is PropertyType.DOUBLE:
-      return 'double'
-    elif prop_type is PropertyType.STRING:
-      return 'String'
-    elif prop_type is PropertyType.ENUM:
-      return 'String'
-    elif prop_type is PropertyType.CHOICES:
-      # TODO(sashab): Think of a nice way to generate code for Choices objects
-      # in Dart.
-      return 'Object'
-    elif prop_type is PropertyType.ANY:
-      return 'Object'
-    elif prop_type is PropertyType.OBJECT:
-      # TODO(sashab): type_.name is the name of the function's parameter for
-      # inline types defined in functions. Think of a way to generate names
-      # for this, or remove all inline type definitions at the start.
-      if type_.instance_of is not None:
-        return type_.instance_of
-      if not isinstance(type_.parent, Function):
-        return self._AddPrefix(type_.name)
-      return 'Object'
-    elif prop_type is PropertyType.FUNCTION:
-      return 'Function'
-    elif prop_type is PropertyType.ARRAY:
-      return 'List<%s>' % self._GetDartType(type_.item_type)
-    elif prop_type is PropertyType.BINARY:
-      return 'String'
-    else:
-      raise NotImplementedError(prop_type)
-