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/*
* ******************************************************************************
* *
* *
* * 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.transforms.comparison;
import org.nd4j.autodiff.samediff.SDVariable;
import org.nd4j.autodiff.samediff.SameDiff;
import org.nd4j.common.base.Preconditions;
import org.nd4j.imports.NoOpNameFoundException;
import org.nd4j.linalg.api.buffer.DataType;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.ops.BaseTransformSameOp;
import org.nd4j.linalg.indexing.conditions.Condition;
import org.nd4j.linalg.indexing.conditions.Conditions;
import java.util.*;
public class CompareAndReplace extends BaseTransformSameOp {
private Condition condition;
private double compare;
private double set;
private double eps;
private Conditions.ConditionMode mode;
public CompareAndReplace(SameDiff sameDiff, SDVariable to, SDVariable from, Condition condition) {
super(sameDiff, to, from, false);
this.condition = condition;
this.compare = condition.getValue();
this.set = 0;
this.mode = condition.conditionType();
this.eps = condition.epsThreshold();
this.extraArgs = new Object[] {compare, set, eps, (double) mode.index};
}
public CompareAndReplace() {
}
/**
* With this constructor, op will check each X element against given Condition, and if condition met, element Z will be set to Y value, and X otherwise
*
* PLEASE NOTE: X will be modified inplace.
*
* Pseudocode:
* z[i] = condition(x[i]) ? y[i] : x[i];
*
* @param x
* @param y
* @param condition
*/
public CompareAndReplace(INDArray x, INDArray y, Condition condition) {
this(x, y, null, condition);
}
/**
* With this constructor, op will check each X element against given Condition, and if condition met, element Z will be set to Y value, and X otherwise
*
* Pseudocode:
* z[i] = condition(x[i]) ? y[i] : x[i];
*
* @param x
* @param y
* @param z
* @param condition
*/
public CompareAndReplace(INDArray x, INDArray y, INDArray z, Condition condition) {
super(x, y, z);
this.compare = condition.getValue();
this.set = 0;
this.mode = condition.conditionType();
this.eps = condition.epsThreshold();
this.extraArgs = new Object[] {compare, set, eps, (double) mode.index};
}
@Override
public Map propertiesForFunction() {
Map ret = new LinkedHashMap<>();
ret.put("compare",compare);
ret.put("set",set);
ret.put("eps",eps);
ret.put("mode",mode);
return ret;
}
@Override
public void setPropertiesForFunction(Map properties) {
if(properties.containsKey("mode")) {
if(properties.get("mode") instanceof Integer) {
Integer mode = (Integer) properties.get("mode");
this.mode = Conditions.ConditionMode.fromNumber(mode);
// no comparison value, just use default
if(!properties.containsKey("compare")) {
this.condition = Conditions.fromInt(mode);
}
} else if(properties.get("mode") instanceof Conditions.ConditionMode) {
Conditions.ConditionMode mode = (Conditions.ConditionMode) properties.get("mode");
this.mode = mode;
// no comparison value, just use default
if(!properties.containsKey("compare")) {
this.condition = Conditions.fromInt(mode.index);
}
}
}
if(properties.containsKey("compare")) {
Double compare = (Double) properties.get("compare");
this.compare = compare;
//condition was set
if(properties.containsKey("mode")) {
this.condition = Conditions.fromInt(mode.index,compare);
}
}
if(properties.containsKey("set")) {
Double set = (Double) properties.get("set");
this.set = set;
}
if(properties.containsKey("eps")) {
Double eps = (Double) properties.get("eps");
this.eps = eps;
}
}
@Override
public int opNum() {
return 13;
}
@Override
public String opName() {
return "car";
}
@Override
public String onnxName() {
throw new NoOpNameFoundException("No onnx op opName found for " + opName());
}
@Override
public String tensorflowName() {
throw new NoOpNameFoundException("No tensorflow op opName found for " + opName());
}
@Override
public List doDiff(List grad) {
//2 inputs: 'to' and 'from'
//Pass through gradient for 'to' where condition is NOT satisfied
//Pass through gradient for 'from' where condition IS satisfied
SDVariable maskMatched = sameDiff.matchCondition(arg(0), condition).castTo(arg().dataType());
SDVariable maskNotMatched = maskMatched.rsub(1.0);
return Arrays.asList(grad.get(0).mul(maskNotMatched), grad.get(0).mul(maskMatched));
}
@Override
public List calculateOutputDataTypes(List dataTypes){
Preconditions.checkState(dataTypes != null && dataTypes.size() == 2, "Expected exactly 2 input datatypes for %s, got input %s", getClass(), dataTypes);
Preconditions.checkState(dataTypes.get(0) == dataTypes.get(1), "Input data types must be the same: got %s", dataTypes);
return Collections.singletonList(dataTypes.get(0));
}
}
