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Java example source code file (ReutersNewsGroupsLoader.java)

This example Java source code file (ReutersNewsGroupsLoader.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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Java - Java tags/keywords

net, network, util

The ReutersNewsGroupsLoader.java Java example source code

/*
 *
 *  * Copyright 2015 Skymind,Inc.
 *  *
 *  *    Licensed under the Apache License, Version 2.0 (the "License");
 *  *    you may not use this file except in compliance with the License.
 *  *    You may obtain a copy of the License at
 *  *
 *  *        http://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.
 *
 */

package org.deeplearning4j.datasets.loader;

import org.apache.commons.io.FileUtils;
import org.deeplearning4j.datasets.fetchers.BaseDataFetcher;
import org.nd4j.linalg.dataset.DataSet;
import org.deeplearning4j.text.tokenization.tokenizerfactory.UimaTokenizerFactory;
import org.deeplearning4j.util.ArchiveUtils;
import org.deeplearning4j.text.sentenceiterator.labelaware.LabelAwareFileSentenceIterator;
import org.deeplearning4j.text.sentenceiterator.labelaware.LabelAwareSentenceIterator;
import org.deeplearning4j.text.tokenization.tokenizerfactory.TokenizerFactory;
import org.deeplearning4j.bagofwords.vectorizer.BagOfWordsVectorizer;
import org.deeplearning4j.bagofwords.vectorizer.TextVectorizer;
import org.deeplearning4j.bagofwords.vectorizer.TfidfVectorizer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

/**
 * @author Adam Gibson
 */
// public class ReutersNewsGroupsLoader extends BaseDataFetcher {

//     private TextVectorizer textVectorizer;
//     private boolean tfidf;
//     public final static String NEWSGROUP_URL = "http://qwone.com/~jason/20Newsgroups/20news-18828.tar.gz";
//     private File reutersRootDir;
//     private static final Logger log = LoggerFactory.getLogger(ReutersNewsGroupsLoader.class);
//     private DataSet load;


//     public ReutersNewsGroupsLoader(boolean tfidf) throws Exception {
//         getIfNotExists();
//         LabelAwareSentenceIterator iter = new LabelAwareFileSentenceIterator(reutersRootDir);
//         List<String> labels =new ArrayList<>();
//         for(File f : reutersRootDir.listFiles()) {
//             if(f.isDirectory())
//                 labels.add(f.getName());
//         }
//         TokenizerFactory tokenizerFactory = new UimaTokenizerFactory();

//         if(tfidf)
//             this.textVectorizer = new TfidfVectorizer.Builder()
//                     .iterate(iter).labels(labels).tokenize(tokenizerFactory).build();

//         else
//             this.textVectorizer = new BagOfWordsVectorizer.Builder()
//                     .iterate(iter).labels(labels).tokenize(tokenizerFactory).build();

//         load = this.textVectorizer.vectorize();
//     }

//     private void getIfNotExists() throws Exception {
//         String home = System.getProperty("user.home");
//         String rootDir = home + File.separator + "reuters";
//         reutersRootDir = new File(rootDir);
//         if(!reutersRootDir.exists())
//             reutersRootDir.mkdir();
//         else if(reutersRootDir.exists())
//             return;


//         File rootTarFile = new File(reutersRootDir,"20news-18828.tar.gz");
//         if(rootTarFile.exists())
//             rootTarFile.delete();
//         rootTarFile.createNewFile();

//         FileUtils.copyURLToFile(new URL(NEWSGROUP_URL), rootTarFile);
//         ArchiveUtils.unzipFileTo(rootTarFile.getAbsolutePath(), reutersRootDir.getAbsolutePath());
//         rootTarFile.delete();
//         FileUtils.copyDirectory(new File(reutersRootDir,"20news-18828"),reutersRootDir);
//         FileUtils.deleteDirectory(new File(reutersRootDir,"20news-18828"));
//         if(reutersRootDir.listFiles() == null)
//             throw new IllegalStateException("No files found!");

//     }


//     /**
//      * Fetches the next dataset. You need to call this
//      * to getFromOrigin a new dataset, otherwise {@link #next()}
//      * just returns the last data applyTransformToDestination fetch
//      *
//      * @param numExamples the number of examples to fetch
//      */
//     @Override
//     public void fetch(int numExamples) {
//         List<DataSet> newData = new ArrayList<>();
//         for(int grabbed = 0; grabbed < numExamples && cursor < load.numExamples(); cursor++,grabbed++) {
//             newData.add(load.get(cursor));
//         }

//         this.curr = DataSet.merge(newData);

//     }
// }

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