old_contents: #
  # Copyright 2018 Analytics Zoo Authors.
  #
  # 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.
  #
  
  from bigdl.nn.keras.layer import KerasLayer
  from zoo.pipeline.api.keras.utils import *
  
  if sys.version >= '3':
      long = int
      unicode = str
  
  
  class ZooKerasCreator(JavaValue):
      def jvm_class_constructor(self):
          name = "createZooKeras" + self.__class__.__name__
          print("creating: " + name)
          return name
  
  
  class ZooKerasLayer(ZooKerasCreator, KerasLayer):
      @classmethod
      def of(cls, jvalue, bigdl_type="float"):
          return KerasLayer(jvalue, bigdl_type)
  
      def __call__(self, x):
          """
          Some other modules point to current module
          :param x: input variables. x is either a Variable or list of Variable.
          :return: Variable containing current module
          """
          from zoo.pipeline.api.autograd import Variable
          return Variable.from_jvalue(callBigDlFunc(self.bigdl_type,
                                                    "connectInputs",
                                                    self,
                                                    to_list(x)))
  
new_contents: #
  # Copyright 2018 Analytics Zoo Authors.
  #
  # 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.
  #
  
  from bigdl.nn.keras.layer import KerasLayer
  from zoo.pipeline.api.keras.utils import *
  
  if sys.version >= '3':
      long = int
      unicode = str
  
  
  class ZooKerasCreator(JavaValue):
      def jvm_class_constructor(self):
          name = "createZooKeras" + self.__class__.__name__
          print("creating: " + name)
          return name
  
  
  class ZooCallable(object):
      def __call__(self, x):
          """
          Some other modules point to current module
          :param x: input variables. x is either a Variable or list of Variable.
          :return: Variable containing current module
          """
          from zoo.pipeline.api.autograd import Variable
          return Variable.from_jvalue(callBigDlFunc(self.bigdl_type,
                                                    "connectInputs",
                                                    self,
                                                    to_list(x)))
  
  
  class ZooKerasLayer(ZooKerasCreator, ZooCallable, KerasLayer):
      @classmethod
      def of(cls, jvalue, bigdl_type="float"):
          return KerasLayer(jvalue, bigdl_type)
  
subject: add Maximum, Minimum, MaxPooling1D keras2 layers (#389)