86 lines
3.2 KiB
Java
86 lines
3.2 KiB
Java
/*******************************************************************************
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* Copyright (c) 2015-2018 Skymind, Inc.
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*
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* This program and the accompanying materials are made available under the
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* terms of the Apache License, Version 2.0 which is available at
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* https://www.apache.org/licenses/LICENSE-2.0.
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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* SPDX-License-Identifier: Apache-2.0
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******************************************************************************/
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package org.deeplearning4j.arbiter.data;
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import org.deeplearning4j.arbiter.optimize.api.data.DataProvider;
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import org.nd4j.linalg.dataset.api.iterator.DataSetIteratorFactory;
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import java.util.Map;
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/**
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* This is a {@link DataProvider} for
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* an {@link DataSetIteratorFactory} which
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* based on a key of {@link DataSetIteratorFactoryProvider#FACTORY_KEY}
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* will create {@link org.nd4j.linalg.dataset.api.iterator.DataSetIterator}
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* for use with arbiter.
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*
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* This {@link DataProvider} is mainly meant for use for command line driven
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* applications.
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*
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* @author Adam Gibson
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*/
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public class DataSetIteratorFactoryProvider implements DataProvider {
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public final static String FACTORY_KEY = "org.deeplearning4j.arbiter.data.data.factory";
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/**
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* Get training data given some parameters for the data.
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* Data parameters map is used to specify things like batch
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* size data preprocessing
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*
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* @param dataParameters Parameters for data. May be null or empty for default data
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* @return training data
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*/
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@Override
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public DataSetIteratorFactory trainData(Map<String, Object> dataParameters) {
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return create(dataParameters);
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}
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/**
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* Get training data given some parameters for the data. Data parameters map
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* is used to specify things like batch
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* size data preprocessing
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*
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* @param dataParameters Parameters for data. May be null or empty for default data
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* @return training data
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*/
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@Override
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public DataSetIteratorFactory testData(Map<String, Object> dataParameters) {
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return create(dataParameters);
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}
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@Override
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public Class<?> getDataType() {
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return DataSetIteratorFactory.class;
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}
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private DataSetIteratorFactory create(Map<String, Object> dataParameters) {
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if (!dataParameters.containsKey(FACTORY_KEY))
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throw new IllegalArgumentException(
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"No data set iterator factory class found. Please specify a class name with key "
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+ FACTORY_KEY);
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String value = dataParameters.get(FACTORY_KEY).toString();
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try {
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Class<? extends DataSetIteratorFactory> clazz =
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(Class<? extends DataSetIteratorFactory>) Class.forName(value);
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return clazz.newInstance();
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} catch (Exception e) {
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throw new RuntimeException("Could not create DataSetIteratorFactory instance - missing no-arg constructor?", e);
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}
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}
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}
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