mojo/tools/generate_java_callback_interfaces.py

   1 """Generate the org.chromium.mojo.bindings.Callbacks interface"""
   2
   3 import argparse
   4 import sys
   5
   6 CALLBACK_TEMPLATE = ("""
   7     /**
   8      * A generic %d-argument callback.
   9      *
  10      * %s
  11      */
  12     interface Callback%d<%s> {
  13         /**
  14          * Call the callback.
  15          */
  16         public void call(%s);
  17     }
  18 """)
  19
  20 INTERFACE_TEMPLATE = (
  21 """// Copyright 2014 The Chromium Authors. All rights reserved.
  22 // Use of this source code is governed by a BSD-style license that can be
  23 // found in the LICENSE file.
  24
  25 // This file was generated using
  26 //     mojo/tools/generate_java_callback_interfaces.py
  27
  28 package org.chromium.mojo.bindings;
  29
  30 /**
  31  * Contains a generic interface for callbacks.
  32  */
  33 public interface Callbacks {
  34
  35     /**
  36      * A generic callback.
  37      */
  38     interface Callback0 {
  39         /**
  40          * Call the callback.
  41          */
  42         public void call();
  43     }
  44 %s
  45 }""")
  46
  47 def GenerateCallback(nb_args):
  48   params = '\n      * '.join(
  49       ['@param <T%d> the type of argument %d.' % (i+1, i+1)
  50        for i in xrange(nb_args)])
  51   template_parameters = ', '.join(['T%d' % (i+1) for i in xrange(nb_args)])
  52   callback_parameters = ', '.join(['T%d arg%d' % ((i+1), (i+1))
  53                                    for i in xrange(nb_args)])
  54   return CALLBACK_TEMPLATE % (nb_args, params, nb_args, template_parameters,
  55                               callback_parameters)
  56
  57 def main():
  58   parser = argparse.ArgumentParser(
  59       description="Generate org.chromium.mojo.bindings.Callbacks")
  60   parser.add_argument("max_args", nargs=1, type=int,
  61       help="maximal number of arguments to generate callbacks for")
  62   args = parser.parse_args()
  63   max_args = args.max_args[0]
  64   print INTERFACE_TEMPLATE % ''.join([GenerateCallback(i+1)
  65                                       for i in xrange(max_args)])
  66   return 0
  67
  68 if __name__ == "__main__":
  69   sys.exit(main())