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The OpenTripPlanner multimodal journey planning system

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package org.opentripplanner.datastore.file;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.GZIPInputStream;
import org.opentripplanner.datastore.api.FileType;

public class FileDataSource extends AbstractFileDataSource {

  /**
   * Create a data source wrapper around a file. This wrapper handles GZIP(.gz) compressed files as
   * well as normal files. It does not handle directories({@link DirectoryDataSource}) or zip-files
   * {@link ZipFileDataSource} which contain multiple files.
   */
  public FileDataSource(File file, FileType type) {
    super(file, type);
  }

  @Override
  public InputStream asInputStream() {
    try {
      // We support both gzip and unzipped files when reading.
      if (file.getName().endsWith(".gz")) {
        return new GZIPInputStream(new FileInputStream(file));
      } else {
        return new FileInputStream(file);
      }
    } catch (IOException e) {
      throw new RuntimeException("Failed to load " + path() + ": " + e.getLocalizedMessage(), e);
    }
  }

  @Override
  public OutputStream asOutputStream() {
    try {
      return new FileOutputStream(file);
    } catch (FileNotFoundException e) {
      throw new RuntimeException("File not found " + path() + ": " + e.getLocalizedMessage(), e);
    }
  }
}