}

            final ByteBuffer buffer = ByteBuffer.allocate((int) fileSize);
            ChannelUtil.read(channel, buffer);
            return buffer.array();
        } finally {
            CloseableUtil.close(is);
        }
    }

    /**
     * Reads text from a file using the default encoding.
     *
     * @param path
     *            The file path. Must not be {@literal null} or empty.

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.nio.charset.StandardCharsets;
import java.util.Date;

import org.codelibs.core.io.CloseableUtil;
import org.codelibs.curl.CurlResponse;
import org.codelibs.fess.Constants;
import org.codelibs.fess.dict.DictionaryException;
import org.codelibs.fess.dict.DictionaryFile.PagingList;

            if (filter != null) {
                ois.setObjectInputFilter(filter);
            }
            try {
                return ois.readObject();
            } finally {
                CloseableUtil.close(ois);
            }
        } catch (final IOException ex) {
            throw new IORuntimeException(ex);
        } catch (final ClassNotFoundException ex) {