Revert of Generate java bindings for constants.

mojo/public/tools/bindings/generators/mojom_java_generator.py

-# Copyright 2013 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.
-
-"""Generates java source files from a mojom.Module."""
-
-import argparse
-import os
-import re
-
-import mojom.generate.generator as generator
-import mojom.generate.module as mojom
-from mojom.generate.template_expander import UseJinja
-
-
-GENERATOR_PREFIX = 'java'
-
-_spec_to_java_type = {
-  'b':     'boolean',
-  'd':     'double',
-  'f':     'float',
-  'h:d:c': 'org.chromium.mojo.system.DataPipe.ConsumerHandle',
-  'h:d:p': 'org.chromium.mojo.system.DataPipe.ProducerHandle',
-  'h:m':   'org.chromium.mojo.system.MessagePipeHandle',
-  'h':     'org.chromium.mojo.system.UntypedHandle',
-  'h:s':   'org.chromium.mojo.system.SharedBufferHandle',
-  'i16':   'short',
-  'i32':   'int',
-  'i64':   'long',
-  'i8':    'byte',
-  's':     'String',
-  'u16':   'short',
-  'u32':   'int',
-  'u64':   'long',
-  'u8':    'byte',
-}
-
-
-def NameToComponent(name):
-  # insert '_' between anything and a Title name (e.g, HTTPEntry2FooBar ->
-  # HTTP_Entry2_FooBar)
-  name = re.sub('([^_])([A-Z][^A-Z_]+)', r'\1_\2', name)
-  # insert '_' between non upper and start of upper blocks (e.g.,
-  # HTTP_Entry2_FooBar -> HTTP_Entry2_Foo_Bar)
-  name = re.sub('([^A-Z_])([A-Z])', r'\1_\2', name)
-  return [x.lower() for x in name.split('_')]
-
-def CapitalizeFirst(string):
-  return string[0].upper() + string[1:]
-
-def UpperCamelCase(name):
-  return ''.join([CapitalizeFirst(x) for x in NameToComponent(name)])
-
-def CamelCase(name):
-  uccc = UpperCamelCase(name)
-  return uccc[0].lower() + uccc[1:]
-
-def ConstantStyle(name):
-  components = NameToComponent(name)
-  if components[0] == 'k':
-    components = components[1:]
-  return '_'.join([x.upper() for x in components])
-
-def GetNameForElement(element):
-  if (isinstance(element, mojom.Enum) or
-      isinstance(element, mojom.Interface) or
-      isinstance(element, mojom.Struct)):
-    return UpperCamelCase(element.name)
-  if (isinstance(element, mojom.Method) or
-      isinstance(element, mojom.Parameter) or
-      isinstance(element, mojom.Field)):
-    return CamelCase(element.name)
-  if isinstance(element,  mojom.EnumValue):
-    return (UpperCamelCase(element.enum_name) + '.' +
-            ConstantStyle(element.name))
-  if (isinstance(element, mojom.NamedValue) or
-      isinstance(element, mojom.Constant)):
-    return ConstantStyle(element.name)
-  raise Exception("Unexpected element: " % element)
-
-def GetPackage(module):
-  if 'JavaPackage' in module.attributes:
-    package = module.attributes['JavaPackage']
-    if isinstance(package, basestring):
-      return package
-    assert package[0] == 'EXPRESSION'
-    assert len(package[1]) == 1
-    return package[1][0][1:-1].encode('string_escape')
-  # Default package.
-  return "org.chromium.mojom." + module.namespace
-
-def GetNameForKind(kind):
-  def _GetNameHierachy(kind):
-    hierachy = []
-    if kind.parent_kind:
-      hierachy = _GetNameHierachy(kind.parent_kind)
-    hierachy.append(kind.name)
-    return hierachy
-
-  elements = [GetPackage(kind.module)]
-  elements += _GetNameHierachy(kind)
-  return '.'.join(elements)
-
-def GetJavaType(kind):
-  if isinstance(kind, (mojom.Struct, mojom.Interface)):
-    return GetNameForKind(kind)
-  if isinstance(kind, mojom.Array):
-    return "%s[]" % GetJavaType(kind.kind)
-  if isinstance(kind, mojom.Enum):
-    return "int"
-  return _spec_to_java_type[kind.spec]
-
-def TranslateConstants(token, module):
-  def _TranslateNamedValue(named_value):
-    entity_name = GetNameForElement(named_value)
-    if named_value.parent_kind:
-      return GetJavaType(named_value.parent_kind) + '.' + entity_name
-    # Handle the case where named_value is a module level constant:
-    if not isinstance(named_value, mojom.EnumValue):
-      entity_name = (GetConstantsMainEntityName(named_value.module) + '.' +
-                      entity_name)
-    return GetPackage(named_value.module) + '.' + entity_name
-
-  if isinstance(token, mojom.NamedValue):
-    return _TranslateNamedValue(token)
-  # Add Long suffix to all number literals.
-  if re.match('^[0-9]+$', token):
-    return token + 'L'
-  return token
-
-def ExpressionToText(value, module):
-  if value[0] != "EXPRESSION":
-    raise Exception("Expected EXPRESSION, got" + value)
-  return "".join(generator.ExpressionMapper(value,
-      lambda token: TranslateConstants(token, module)))
-
-def GetConstantsMainEntityName(module):
-  # This constructs the name of the embedding classes for module level constants
-  # by extracting the mojom's filename and prepending it to Constants.
-  return (UpperCamelCase(module.path.split('/')[-1].rsplit('.', 1)[0]) +
-          'Constants')
-
-class Generator(generator.Generator):
-
-  java_filters = {
-    "expression_to_text": ExpressionToText,
-    "java_type": GetJavaType,
-    "name": GetNameForElement,
-    "verify_token_type": generator.VerifyTokenType,
-  }
-
-  def GetJinjaExports(self):
-    return {
-      "module": self.module,
-      "package": GetPackage(self.module),
-    }
-
-  @UseJinja("java_templates/constants.java.tmpl", filters=java_filters,
-            lstrip_blocks=True, trim_blocks=True)
-  def GenerateConstantsSource(self, module):
-    exports = self.GetJinjaExports()
-    exports.update({"main_entity": GetConstantsMainEntityName(module),
-                    "constants": module.constants})
-    return exports
-
-  def GenerateFiles(self, unparsed_args):
-    parser = argparse.ArgumentParser()
-    parser.add_argument("--java_output_directory", dest="java_output_directory")
-    args = parser.parse_args(unparsed_args)
-    if self.output_dir and args.java_output_directory:
-      self.output_dir = os.path.join(args.java_output_directory,
-                                     GetPackage(self.module).replace('.', '/'))
-      if not os.path.exists(self.output_dir):
-        try:
-          os.makedirs(self.output_dir)
-        except:
-          # Ignore errors on directory creation.
-          pass
-
-    if self.module.constants:
-      self.Write(self.GenerateConstantsSource(self.module),
-                 "%s.java" % GetConstantsMainEntityName(self.module))