public long copyTo(CharSink sink) throws IOException {
    checkNotNull(sink);

    Closer closer = Closer.create();
    try {
      Reader reader = closer.register(openStream());
      Writer writer = closer.register(sink.openStream());
      return CharStreams.copy(reader, writer);
    } catch (Throwable e) {
      throw closer.rethrow(e);
    } finally {
      closer.close();
    }
  }

  /**

  public long copyTo(CharSink sink) throws IOException {
    checkNotNull(sink);

    Closer closer = Closer.create();
    try {
      Reader reader = closer.register(openStream());
      Writer writer = closer.register(sink.openStream());
      return CharStreams.copy(reader, writer);
    } catch (Throwable e) {
      throw closer.rethrow(e);
    } finally {
      closer.close();
    }
  }

  /**

   */
  public abstract InputStream openStream() throws IOException;

  /**
   * Opens a new buffered {@link InputStream} for reading from this source. The returned stream is
   * not required to be a {@link BufferedInputStream} in order to allow implementations to simply
   * delegate to {@link #openStream()} when the stream returned by that method does not benefit from

    public static InputStream getResourceAsStream(final String path, final String extension) {
        assertArgumentNotEmpty("path", path);

        final URL url = getResource(path, extension);
        return URLUtil.openStream(url);
    }

    /**
     * Returns the resource as a stream from the context class loader.
     * Returns <code>null</code> if the resource is not found.
     *
     * @param path

     */
    public static int copy(final URL in, final OutputStream out) {
        assertArgumentNotNull("in", in);
        assertArgumentNotNull("out", out);

        final InputStream is = URLUtil.openStream(in);
        try {
            if (out instanceof FileOutputStream) {
                return copyInternal(wrap(is), (FileOutputStream) out);
            }
            return copyInternal(wrap(is), wrap(out));

            project.setOriginalModel(model);
            ConsumerPomArtifactTransformer t = new ConsumerPomArtifactTransformer((s, p, f) -> {
                try (InputStream is = f.openStream()) {
                    return DefaultConsumerPomBuilder.transformPom(new MavenStaxReader().read(is), project);
                }
            });

    // read the first 8 chars manually, since there's no equivalent to ByteSource.slice
    // TODO(cgdecker): Add CharSource.slice?
    StringBuilder builder = new StringBuilder();
    Reader reader = concatenated.openStream(); // no need to worry about closing
    for (int i = 0; i < 8; i++) {
      builder.append((char) reader.read());
    }
    assertEquals(expected, builder.toString());
  }

    // read the first 8 chars manually, since there's no equivalent to ByteSource.slice
    // TODO(cgdecker): Add CharSource.slice?
    StringBuilder builder = new StringBuilder();
    Reader reader = concatenated.openStream(); // no need to worry about closing
    for (int i = 0; i < 8; i++) {
      builder.append((char) reader.read());
    }
    assertEquals(expected, builder.toString());
  }

            this.zipUrl = zipUrl;
            this.prefix = prefix;
        }

        private void loadFromZip(final URL zipUrl) {
            final ZipInputStream zis = new ZipInputStream(URLUtil.openStream(zipUrl));
            try {
                ZipEntry entry = null;
                while ((entry = ZipInputStreamUtil.getNextEntry(zis)) != null) {
                    entryNames.add(entry.getName());

  public final ByteSink encodingSink(CharSink encodedSink) {
    checkNotNull(encodedSink);
    return new ByteSink() {
      @Override
      public OutputStream openStream() throws IOException {
        return encodingStream(encodedSink.openStream());
      }
    };
  }

  // TODO(lowasser): document the extent of leniency, probably after adding ignore(CharMatcher)