--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/thirdparty/google_appengine/google/appengine/cron/groc.py	Tue Jan 20 13:19:45 2009 +0000
@@ -0,0 +1,74 @@
+#!/usr/bin/env python
+#
+# Copyright 2007 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+
+"""A wrapper around the generated Groc parser and lexer."""
+
+
+import google
+
+import antlr3
+
+import GrocLexer
+import GrocParser
+
+
+class GrocException(Exception):
+  """An error occurred while parsing the groc input string."""
+
+
+class GrocLexerWithErrors(GrocLexer.GrocLexer):
+  """An overridden Lexer that raises exceptions."""
+
+  def emitErrorMessage(self, msg):
+    """Raise an exception if the input fails to parse correctly.
+
+    Overriding the default, which normally just prints a message to
+    stderr.
+
+    Arguments:
+      msg: the error message
+    Raises:
+      GrocException: always.
+    """
+    raise GrocException(msg)
+
+
+class GrocParserWithErrors(GrocParser.GrocParser):
+  """An overridden Parser that raises exceptions."""
+
+  def emitErrorMessage(self, msg):
+    """Raise an exception if the input fails to parse correctly.
+
+    Overriding the default, which normally just prints a message to
+    stderr.
+
+    Arguments:
+      msg: the error message
+    Raises:
+      GrocException: always.
+    """
+    raise GrocException(msg)
+
+
+def CreateParser(parse_string):
+  """Creates a Groc Parser."""
+  input_string = antlr3.ANTLRStringStream(parse_string)
+  lexer = GrocLexerWithErrors(input_string)
+  tokens = antlr3.CommonTokenStream(lexer)
+  parser = GrocParserWithErrors(tokens)
+  return parser