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/*
* Copyright (c) 2015-2019 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.autodiff.samediff.config;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import lombok.AccessLevel;
import lombok.Getter;
import lombok.NonNull;
import lombok.Setter;
import org.nd4j.autodiff.listeners.Listener;
import org.nd4j.autodiff.listeners.records.EvaluationRecord;
import org.nd4j.autodiff.samediff.SDVariable;
import org.nd4j.autodiff.samediff.SameDiff;
import org.nd4j.common.base.Preconditions;
import org.nd4j.evaluation.IEvaluation;
import org.nd4j.linalg.dataset.adapter.MultiDataSetIteratorAdapter;
import org.nd4j.linalg.dataset.api.iterator.DataSetIterator;
import org.nd4j.linalg.dataset.api.iterator.MultiDataSetIterator;
/**
* Configuration for a {@link SameDiff} evaluation operation.
*
* Used in {@link SameDiff#evaluate()}.
*/
@Getter
@Setter
public class EvaluationConfig {
@NonNull
private Map> evaluations = new HashMap<>();
@NonNull
private Map labelIndices = new HashMap<>();
private MultiDataSetIterator data;
@NonNull
private List listeners = new ArrayList<>();
private boolean singleInput = false;
@Setter(AccessLevel.NONE)
private SameDiff sd;
public EvaluationConfig(@NonNull SameDiff sd){
this.sd = sd;
}
/**
* Add evaluations to be preformed on a specified variable, and set that variable's label index.
*
* Setting a label index is required if using a MultiDataSetIterator.
*
* @param param The param to evaluate
* @param labelIndex The label index of that parameter
* @param evaluations The evaluations to preform
*/
public EvaluationConfig evaluate(@NonNull String param, int labelIndex, @NonNull IEvaluation... evaluations){
return evaluate(param, evaluations).labelIndex(param, labelIndex);
}
/**
* See {@link #evaluate(String, int, IEvaluation[])}
*/
public EvaluationConfig evaluate(@NonNull SDVariable variable, int labelIndex, @NonNull IEvaluation... evaluations){
return evaluate(variable.name(), labelIndex, evaluations);
}
/**
* Add evaluations to be preformed on a specified variable, without setting a label index.
*
* Setting a label index (which is not done here) is required if using a MultiDataSetIterator.
*
* @param param The param to evaluate
* @param evaluations The evaluations to preform
*/
public EvaluationConfig evaluate(@NonNull String param, @NonNull IEvaluation... evaluations){
if(this.evaluations.get(param) == null){
this.evaluations.put(param, new ArrayList());
}
this.evaluations.get(param).addAll(Arrays.asList(evaluations));
return this;
}
/**
* See {@link #evaluate(String, IEvaluation[])}
*/
public EvaluationConfig evaluate(@NonNull SDVariable variable, @NonNull IEvaluation... evaluations){
return evaluate(variable.name(), evaluations);
}
/**
* Set the label index for a parameter
*/
public EvaluationConfig labelIndex(@NonNull String param, int labelIndex){
if(this.labelIndices.get(param) != null){
int existingIndex = this.labelIndices.get(param);
Preconditions.checkArgument(existingIndex == labelIndex,
"Different label index already specified for param %s. Already specified: %s, given: %s",
param, existingIndex, labelIndex);
}
labelIndices.put(param, labelIndex);
return this;
}
/**
* See {@link #labelIndex(String, int)}
*/
public EvaluationConfig labelIndex(@NonNull SDVariable variable, int labelIndex){
return labelIndex(variable.name(), labelIndex);
}
/**
* Add listeners for this operation
*/
public EvaluationConfig listeners(@NonNull Listener... listeners){
this.listeners.addAll(Arrays.asList(listeners));
return this;
}
/**
* Set the data to evaluate on.
*
* Setting a label index for each variable to evaluate is required
*/
public EvaluationConfig data(@NonNull MultiDataSetIterator data){
this.data = data;
singleInput = false;
return this;
}
/**
* Set the data to evaluate on.
*
* Setting a label index for each variable to evaluate is NOT required (since there is only one input)
*/
public EvaluationConfig data(@NonNull DataSetIterator data){
this.data = new MultiDataSetIteratorAdapter(data);
singleInput = true;
return this;
}
private void validateConfig(){
Preconditions.checkNotNull(data, "Must specify data. It may not be null.");
if(!singleInput){
for(String param : this.evaluations.keySet()){
Preconditions.checkState(labelIndices.containsKey(param),
"Using multiple input dataset iterator without specifying a label index for %s", param);
}
}
for(String param : this.evaluations.keySet()){
Preconditions.checkState(sd.variableMap().containsKey(param),
"Parameter %s not present in this SameDiff graph", param);
}
}
/**
* Run the evaluation.
*
* Note that the evaluations in the returned {@link EvaluationRecord} are the evaluations set using {@link #evaluate(String, int, IEvaluation[])},
* it does not matter which you use to access results.
*
* @return The specified listeners, in an {@link EvaluationRecord} for easy access.
*/
public EvaluationRecord exec(){
validateConfig();
if(singleInput){
for(String param : this.evaluations.keySet()){
labelIndices.put(param, 0);
}
}
sd.evaluate(data, evaluations, labelIndices, listeners.toArray(new Listener[0]));
return new EvaluationRecord(evaluations);
}
}
