org.nd4j.autodiff.samediff.internal.Variable Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2015-2019 Skymind, Inc.
*
* This program and the accompanying materials are made available under the
* terms of the Apache License, Version 2.0 which is available at
* https://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.
*
* SPDX-License-Identifier: Apache-2.0
******************************************************************************/
package org.nd4j.autodiff.samediff.internal;
import lombok.*;
import org.nd4j.autodiff.samediff.SDVariable;
import java.util.List;
@AllArgsConstructor
@NoArgsConstructor
@Data //TODO immutable?
@Builder
@EqualsAndHashCode(exclude = {"gradient", "variableIndex"})
public class Variable {
protected String name;
protected SDVariable variable;
protected List inputsForOp;
protected List controlDepsForOp; //if a op control dependency (x -> opY) exists, then "opY" will be in this list
protected List controlDepsForVar; //if a variable control dependency (x -> varY) exists, then "varY" will be in this list
protected String outputOfOp; //Null for placeholders/constants. For array type SDVariables, the name of the op it's an output of
protected List controlDeps; //Control dependencies: name of ops that must be available before this variable is considered available for execution
protected SDVariable gradient; //Variable corresponding to the gradient of this variable
protected int variableIndex = -1;
}