org.nd4j.linalg.dataset.api.preprocessor.CompositeDataSetPreProcessor 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.
*
* 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.dataset.api.preprocessor;
import org.nd4j.base.Preconditions;
import org.nd4j.linalg.dataset.api.DataSet;
import org.nd4j.linalg.dataset.api.DataSetPreProcessor;
import org.nd4j.linalg.dataset.api.MultiDataSet;
import org.nd4j.linalg.dataset.api.MultiDataSetPreProcessor;
/**
* A simple Composite DataSetPreProcessor - allows you to apply multiple DataSetPreProcessors sequentially
* on the one DataSet, in the order they are passed to the constructor
*
* @author Alex Black
*/
public class CompositeDataSetPreProcessor implements DataSetPreProcessor {
private final boolean stopOnEmptyDataSet;
private DataSetPreProcessor[] preProcessors;
/**
* @param preProcessors Preprocessors to apply. They will be applied in this order
*/
public CompositeDataSetPreProcessor(DataSetPreProcessor... preProcessors) {
this(false, preProcessors);
}
public CompositeDataSetPreProcessor(boolean stopOnEmptyDataSet, DataSetPreProcessor... preProcessors){
this.stopOnEmptyDataSet = stopOnEmptyDataSet;
this.preProcessors = preProcessors;
}
@Override
public void preProcess(DataSet dataSet) {
Preconditions.checkNotNull(dataSet, "Encountered null dataSet");
if(stopOnEmptyDataSet && dataSet.isEmpty()) {
return;
}
for(DataSetPreProcessor p : preProcessors){
p.preProcess(dataSet);
if(stopOnEmptyDataSet && dataSet.isEmpty()) {
return;
}
}
}
}