nd4j/nd4j-backends/nd4j-api-parent/nd4j-api/src/main/java/org/nd4j/linalg/api/ops/impl/shape/Split.java
/*
* ******************************************************************************
* *
* *
* * 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.
* *
* * See the NOTICE file distributed with this work for additional
* * information regarding copyright ownership.
* * 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.shape;
import lombok.NonNull;
import lombok.val;
import org.nd4j.autodiff.samediff.SDVariable;
import org.nd4j.autodiff.samediff.SameDiff;
import org.nd4j.common.base.Preconditions;
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.ndarray.INDArray;
import org.nd4j.linalg.api.ops.DynamicCustomOp;
import org.nd4j.linalg.api.ops.impl.controlflow.compat.Merge;
import org.tensorflow.framework.AttrValue;
import org.tensorflow.framework.GraphDef;
import org.tensorflow.framework.NodeDef;
import java.util.*;
/**
* Split op
*/
public class Split extends DynamicCustomOp {
private int numSplit;
private int splitDim;
public Split() {
}
public Split(SameDiff sameDiff, SDVariable input, int numSplit, int splitDim) {
super(null,sameDiff,new SDVariable[]{input});
this.numSplit = numSplit;
this.splitDim = splitDim;
addIArgument(numSplit,splitDim);
}
public Split(@NonNull INDArray in, INDArray out) {
super(null, new INDArray[]{in}, wrapOrNull(out), null, (List<Long>)null);
}
public Split(INDArray input, int numSplit, int splitDim) {
super(null,input,null,Collections.emptyList(),new long[0]);
addIArgument(numSplit,splitDim);
this.numSplit = numSplit;
this.splitDim = splitDim;
}
public Split(SameDiff sd, SDVariable input, SDVariable numSplit, int splitDim) {
super(sd,new SDVariable[]{input,numSplit});
addIArgument(splitDim);
}
public Split(INDArray input, INDArray numSplit, int splitDim) {
super(new INDArray[]{input,numSplit},null);
addIArgument(splitDim);
}
@Override
public String opName() {
return "split";
}
@Override
public String tensorflowName() {
return "Split";
}
@Override
public void configureFromArguments() {
super.configureFromArguments();
}
@Override
public Map<String, Object> propertiesForFunction() {
Map<String,Object> ret = new HashMap<>();
ret.put("numSplit",numSplit);
ret.put("splitDim",splitDim);
return ret;
}
@Override
public void setPropertiesForFunction(Map<String, Object> properties) {
if(properties.containsKey("splitDim")) {
Integer splitDim = getIntValueFromProperty("splitDim",properties);
this.splitDim = splitDim;
}
if(properties.containsKey("numSplit")) {
Integer numSplit = getIntValueFromProperty("numSplit",properties);
this.numSplit = numSplit;
}
}
@Override
public void initFromTensorFlow(NodeDef nodeDef, SameDiff initWith, Map<String, AttrValue> attributesForNode, GraphDef graph) {
val numSplits = (int) attributesForNode.get("num_split").getI();
this.numSplit = numSplits;
addIArgument(numSplits);
val splitDim = TFGraphMapper.getArrayFrom(TFGraphMapper.getNodeWithNameFromGraph(graph,nodeDef.getInput(0)),graph);
if(splitDim != null) {
this.splitDim = splitDim.getInt(0);
addIArgument(splitDim.getInt(0));
}
}
@Override
public Map<String, Map<String, PropertyMapping>> mappingsForFunction() {
Map<String,Map<String,PropertyMapping>> ret = new HashMap<>();
Map<String,PropertyMapping> map = new HashMap<>();
val splitDim = PropertyMapping.builder()
.tfInputPosition(0)
.propertyNames(new String[]{"splitDim"})
.build();
val numSplit = PropertyMapping.builder()
.tfAttrName("num_split")
.propertyNames(new String[]{"numSplit"})
.build();
map.put("numSplit",numSplit);
map.put("splitDim",splitDim);
ret.put(tensorflowName(),map);
return ret;
}
@Override
public int getNumOutputs(){
return numSplit;
}
@Override
public List<DataType> calculateOutputDataTypes(List<DataType> dataTypes) {
Preconditions.checkState(dataTypes != null && !dataTypes.isEmpty(), "No datatypes were provided for %s: %s", getClass(), dataTypes);
DataType dt;
if(dataTypes.size() == 1) {
dt = dataTypes.get(0);
} else {
//Order seems to usually be axis first for TF import? libnd4j supports both...
if(dataTypes.get(0).isIntType()){
dt = dataTypes.get(1);
} else {
dt = dataTypes.get(0);
}
}
//Output types are same as first input type - just numSplits of them...
List<DataType> out = new ArrayList<>(numSplit);
for( int i = 0; i < numSplit; i++) {
out.add(dt);
}
return out;
}
@Override
public List<SDVariable> doDiff(List<SDVariable> f1) {
return Arrays.asList(new Concat(sameDiff,splitDim,f1.toArray(new SDVariable[f1.size()])).outputVariables());
}
}