org.nd4j.linalg.api.ops.impl.transforms.custom.TopK Maven / Gradle / Ivy
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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.
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* 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
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* under the License.
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* SPDX-License-Identifier: Apache-2.0
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package org.nd4j.linalg.api.ops.impl.transforms.custom;
import org.nd4j.autodiff.samediff.SDVariable;
import org.nd4j.autodiff.samediff.SameDiff;
import org.nd4j.base.Preconditions;
import org.nd4j.imports.graphmapper.tf.TFGraphMapper;
import org.nd4j.linalg.api.buffer.DataType;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.ops.DynamicCustomOp;
import org.nd4j.linalg.util.ArrayUtil;
import org.tensorflow.framework.AttrValue;
import org.tensorflow.framework.GraphDef;
import org.tensorflow.framework.NodeDef;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Map;
/**
* Top K op
*
* @author Alex Black
*/
public class TopK extends DynamicCustomOp {
private boolean sorted;
private int k;
public TopK(){ }
public TopK(SameDiff sd, SDVariable in, int k, boolean sorted){
super(sd, new SDVariable[]{in}, false);
this.k = k;
this.sorted = sorted;
addIArgument(ArrayUtil.fromBoolean(sorted), k);
}
@Override
public String opName(){
return "top_k";
}
@Override
public String tensorflowName() {
return "TopKV2";
}
@Override
public void initFromTensorFlow(NodeDef nodeDef, SameDiff initWith, Map attributesForNode, GraphDef graph) {
String thisName = nodeDef.getName();
// FIXME: ????
String inputName = thisName + "/k";
NodeDef kNode = null;
for(int i = 0; i < graph.getNodeCount(); i++) {
if(graph.getNode(i).getName().equals(inputName)){
kNode = graph.getNode(i);
break;
}
}
this.sorted = nodeDef.getAttrOrThrow("sorted").getB();
if (kNode != null) {
Preconditions.checkState(kNode != null, "Could not find 'k' parameter node for op: %s", thisName);
INDArray arr = TFGraphMapper.getInstance().getNDArrayFromTensor(inputName, kNode, graph);
this.k = arr.getInt(0);
addIArgument(ArrayUtil.fromBoolean(sorted), k);
} else
addIArgument(ArrayUtil.fromBoolean(sorted));
}
@Override
public List doDiff(List i_v) {
throw new UnsupportedOperationException("Not implemented yet");
}
@Override
public List calculateOutputDataTypes(List dataTypes){
//2 outputs: values and indices
//TODO make thit configurable
return Arrays.asList(dataTypes.get(0), DataType.INT);
}
}