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/*******************************************************************************
* 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.custom;
import lombok.val;
import org.nd4j.autodiff.samediff.SDVariable;
import org.nd4j.autodiff.samediff.SameDiff;
import org.nd4j.base.Preconditions;
import org.nd4j.imports.NoOpNameFoundException;
import org.nd4j.imports.descriptors.properties.PropertyMapping;
import org.nd4j.imports.graphmapper.tf.TFGraphMapper;
import org.nd4j.linalg.api.buffer.DataType;
import org.nd4j.linalg.api.ops.DynamicCustomOp;
import org.tensorflow.framework.AttrValue;
import org.tensorflow.framework.GraphDef;
import org.tensorflow.framework.NodeDef;
import java.util.*;
/**
* Created by farizrahman4u on 3/16/18.
*/
public class ReverseSequence extends DynamicCustomOp {
int seqDim;
int batchDim;
public ReverseSequence(SameDiff sameDiff, SDVariable i_v, SDVariable seqLengths, int seqDim, int batchDim) {
super(null, sameDiff, new SDVariable[]{i_v, seqLengths}, false);
this.seqDim = seqDim;
this.batchDim = batchDim;
addArguments();
}
public ReverseSequence(SameDiff sameDiff, SDVariable i_v, SDVariable seqLengths) {
super(null, sameDiff, new SDVariable[]{i_v, seqLengths}, false);
this.seqDim = 1;
this.batchDim = 0;
addArguments();
}
private void addArguments(){
addIArgument(seqDim);
addIArgument(batchDim);
}
public ReverseSequence() {
}
@Override
public String opName() {
return "reverse_sequence";
}
@Override
public void initFromTensorFlow(NodeDef nodeDef, SameDiff initWith, Map attributesForNode, GraphDef graph) {
TFGraphMapper.getInstance().initFunctionFromProperties(nodeDef.getOp(), this, attributesForNode, nodeDef, graph);
addArguments();
}
@Override
public Map> mappingsForFunction() {
Map> ret = new HashMap<>();
Map attrs = new LinkedHashMap<>();
val seqDim = PropertyMapping.builder()
.propertyNames(new String[]{"seqDim"})
.tfAttrName("seq_dim")
.build();
val batchDim = PropertyMapping.builder()
.propertyNames(new String[]{"batchDim"})
.tfAttrName("batch_dim")
.build();
attrs.put("seqDim", seqDim);
attrs.put("batchDim", batchDim);
ret.put(tensorflowName(), attrs);
return ret;
}
@Override
public String onnxName() {
throw new NoOpNameFoundException("No onnx op opName found for " + opName());
}
@Override
public String tensorflowName() {
return "ReverseSequence";
}
@Override
public List doDiff(List f1) {
SDVariable ret = f().reverseSequence(f1.get(0), arg(1), seqDim, batchDim);
return Arrays.asList(ret, f().zerosLike(arg(1)));
}
@Override
public List calculateOutputDataTypes(List dataTypes){
return Collections.singletonList(dataTypes.get(0));
}
}