ExtractTweetidsFromCollection.java

/**
 * 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.index;

import java.io.File;

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

public class ExtractTweetidsFromCollection {
  private static final String COLLECTION_OPTION = "collection";

  @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));

    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)) {
      HelpFormatter formatter = new HelpFormatter();
      formatter.printHelp(ExtractTweetidsFromCollection.class.getName(), options);
      System.exit(-1);
    }

    String collectionPath = cmdline.getOptionValue(COLLECTION_OPTION);

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

    StatusStream stream = new JsonStatusCorpusReader(file);

    Status status;
    while ((status = stream.next()) != null) {
      System.out.println(status.getId() + "\t" + status.getScreenname());
    }
  }
}