assertArgumentNotNull("file", file);

        final FileInputStream is = InputStreamUtil.create(file);
        try {
            final FileChannel channel = is.getChannel();
            final long fileSize = ChannelUtil.size(channel);

            if (fileSize > maxSize) {

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLDecoder;
import java.net.URLStreamHandler;
import java.nio.channels.Channels;
import java.nio.charset.StandardCharsets;

import org.codelibs.core.lang.StringUtil;

import com.google.auth.oauth2.ServiceAccountCredentials;
import com.google.cloud.NoCredentials;

 */
package org.codelibs.fess.crawler.client.gcs;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.nio.channels.Channels;
import java.util.Date;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

				"application/vnd.uplanet.bearer-choice-wbxml",
				"application/vnd.uplanet.cacheop",
				"application/vnd.uplanet.cacheop-wbxml",
				"application/vnd.uplanet.channel",
				"application/vnd.uplanet.channel-wbxml",
				"application/vnd.uplanet.list",
				"application/vnd.uplanet.list-wbxml",
				"application/vnd.uplanet.listcmd",
				"application/vnd.uplanet.listcmd-wbxml",