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 %s
  35 }""")
  36
  37 def GenerateCallback(nb_args):
  38    params = '\n      * '.join(
  39        ['@param <T%d> the type of argument %d.' % (i+1, i+1)
  40         for i in xrange(nb_args)])
  41    template_parameters = ', '.join(['T%d' % (i+1) for i in xrange(nb_args)])
  42    callback_parameters = ', '.join(['T%d arg%d' % ((i+1), (i+1))
  43                                     for i in xrange(nb_args)])
  44    return CALLBACK_TEMPLATE % (nb_args, params, nb_args, template_parameters,
  45                                callback_parameters)
  46
  47 def main():
  48   parser = argparse.ArgumentParser(
  49       description="Generate org.chromium.mojo.bindings.Callbacks")
  50   parser.add_argument("max_args", nargs=1, type=int,
  51       help="maximal number of arguments to generate callbacks for")
  52   args = parser.parse_args()
  53   max_args = args.max_args[0]
  54   print INTERFACE_TEMPLATE % ''.join([GenerateCallback(i+1)
  55                                       for i in xrange(max_args)])
  56   return 0
  57
  58 if __name__ == "__main__":
  59   sys.exit(main())