com.intel.analytics.bigdl.nn.ops.Operation.scala Maven / Gradle / Ivy
/*
* Copyright 2016 The BigDL 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.
*/
package com.intel.analytics.bigdl.nn.ops
import com.intel.analytics.bigdl.nn.abstractnn.{AbstractModule, Activity}
import com.intel.analytics.bigdl.tensor.TensorNumericMath.TensorNumeric
import scala.reflect.ClassTag
/**
* [[Operation]] is an abstract class which represents a forward only layer.
* An operations has only forward functions and without backward functions.
* An operations should be only used in graph and make sure the backward graph won't contain
* operations.
*
* @tparam A Input data type
* @tparam T Numeric type. Only support float/double now
*/
abstract class Operation[A <: Activity: ClassTag, B <: Activity: ClassTag, T: ClassTag]
(implicit ev: TensorNumeric[T]) extends AbstractModule[A, B, T]{
gradInput = Activity.emptyGradInput(this.getName()).asInstanceOf[A]
final override def updateGradInput(input: A, gradOutput: B): A = {
throw new UnsupportedOperationException("Operation does not support updateGradInput() method")
}
final override def backward(input: A, gradOutput: B): A = {
throw new UnsupportedOperationException("Operation does not support backward() method")
}
}