org.nd4j.linalg.api.ops.impl.transforms.same.Identity Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2015-2018 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.linalg.api.ops.impl.transforms.same;
import org.nd4j.autodiff.samediff.SDVariable;
import org.nd4j.autodiff.samediff.SameDiff;
import org.nd4j.base.Preconditions;
import org.nd4j.linalg.api.buffer.DataType;
import org.nd4j.linalg.api.ops.impl.transforms.BaseDynamicTransformOp;
import org.nd4j.linalg.api.shape.LongShapeDescriptor;
import org.nd4j.linalg.api.shape.Shape;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.UUID;
/**
* Identity function
*
* @author Adam Gibson
*/
public class Identity extends BaseDynamicTransformOp {
public Identity(SameDiff sd, SDVariable input){
super(sd, new SDVariable[]{input}, false);
}
public Identity(){ }
@Override
public String opName() {
return "identity";
}
@Override
public String onnxName() {
return "Constant";
}
@Override
public String tensorflowName() {
return "Identity";
}
@Override
public String[] tensorflowNames() {
return new String[]{"Identity"};
}
@Override
public List doDiff(List i_v) {
return i_v;
}
@Override
public List calculateOutputDataTypes(List dataTypes){
Preconditions.checkState(dataTypes != null && dataTypes.size() == 1, "Expected exactly 1 input datatype for %s, got input %s", getClass(), dataTypes);
return dataTypes;
}
@Override
public List calculateOutputShape() {
if(inputArguments == null || inputArguments.isEmpty())
return Collections.emptyList();
return Collections.singletonList(inputArguments.get(0).shapeDescriptor());
}
}