cc.twittertools.util.ExtractSubcollection.java Source code

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Here is the source code for cc.twittertools.util.ExtractSubcollection.java

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/**
 * Twitter Tools
 *
 * 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 cc.twittertools.util;

import it.unimi.dsi.fastutil.longs.LongOpenHashSet;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.OptionBuilder;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.apache.log4j.Logger;

import cc.twittertools.corpus.data.JsonStatusCorpusReader;
import cc.twittertools.corpus.data.Status;
import cc.twittertools.corpus.data.StatusStream;

public class ExtractSubcollection {
    private static final Logger LOG = Logger.getLogger(ExtractSubcollection.class);

    private static final String COLLECTION_OPTION = "collection";
    private static final String ID_OPTION = "tweetids";

    @SuppressWarnings("static-access")
    public static void main(String[] args) throws Exception {
        Options options = new Options();

        options.addOption(OptionBuilder.withArgName("dir").hasArg().withDescription("source collection directory")
                .create(COLLECTION_OPTION));
        options.addOption(
                OptionBuilder.withArgName("file").hasArg().withDescription("list of tweetids").create(ID_OPTION));

        CommandLine cmdline = null;
        CommandLineParser parser = new GnuParser();
        try {
            cmdline = parser.parse(options, args);
        } catch (ParseException exp) {
            System.err.println("Error parsing command line: " + exp.getMessage());
            System.exit(-1);
        }

        if (!cmdline.hasOption(COLLECTION_OPTION) || !cmdline.hasOption(ID_OPTION)) {
            HelpFormatter formatter = new HelpFormatter();
            formatter.printHelp(ExtractSubcollection.class.getName(), options);
            System.exit(-1);
        }

        String collectionPath = cmdline.getOptionValue(COLLECTION_OPTION);

        LongOpenHashSet tweetids = new LongOpenHashSet();
        File tweetidsFile = new File(cmdline.getOptionValue(ID_OPTION));
        if (!tweetidsFile.exists()) {
            System.err.println("Error: " + tweetidsFile + " does not exist!");
            System.exit(-1);
        }
        LOG.info("Reading tweetids from " + tweetidsFile);

        FileInputStream fin = new FileInputStream(tweetidsFile);
        BufferedReader br = new BufferedReader(new InputStreamReader(fin));

        String s;
        while ((s = br.readLine()) != null) {
            tweetids.add(Long.parseLong(s));
        }
        br.close();
        fin.close();
        LOG.info("Read " + tweetids.size() + " tweetids.");

        File file = new File(collectionPath);
        if (!file.exists()) {
            System.err.println("Error: " + file + " does not exist!");
            System.exit(-1);
        }

        PrintStream out = new PrintStream(System.out, true, "UTF-8");
        StatusStream stream = new JsonStatusCorpusReader(file);
        Status status;
        while ((status = stream.next()) != null) {
            if (tweetids.contains(status.getId())) {
                out.println(status.getJsonObject().toString());
            }
        }
        stream.close();
        out.close();
    }
}