org.apache.accumulo.shell.ShellUtil.java Source code

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Here is the source code for org.apache.accumulo.shell.ShellUtil.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.accumulo.shell;

import static java.nio.charset.StandardCharsets.UTF_8;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Base64;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Scanner;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.Option;
import org.apache.hadoop.io.Text;

import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableMap.Builder;

import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;

public class ShellUtil {

    /**
     * Scans the given file line-by-line (ignoring empty lines) and returns a list containing those
     * lines. If decode is set to true, every line is decoded using {@link Base64} from the UTF-8
     * bytes of that line before inserting in the list.
     *
     * @param filename
     *          Path to the file that needs to be scanned
     * @param decode
     *          Whether to decode lines in the file
     * @return List of {@link Text} objects containing data in the given file
     * @throws FileNotFoundException
     *           if the given file doesn't exist
     */
    @SuppressFBWarnings(value = "PATH_TRAVERSAL_IN", justification = "app is run in same security context as user providing the filename")
    public static List<Text> scanFile(String filename, boolean decode) throws FileNotFoundException {
        String line;
        List<Text> result = new ArrayList<>();
        try (Scanner file = new Scanner(new File(filename), UTF_8.name())) {
            while (file.hasNextLine()) {
                line = file.nextLine();
                if (!line.isEmpty()) {
                    result.add(decode ? new Text(Base64.getDecoder().decode(line)) : new Text(line));
                }
            }
        }
        return result;
    }

    public static Map<String, String> parseMapOpt(CommandLine cl, Option opt) {
        if (cl.hasOption(opt.getLongOpt())) {
            Builder<String, String> builder = ImmutableMap.builder();
            String[] keyVals = cl.getOptionValue(opt.getLongOpt()).split(",");
            for (String keyVal : keyVals) {
                String[] sa = keyVal.split("=");
                builder.put(sa[0], sa[1]);
            }

            return builder.build();
        } else {
            return Collections.emptyMap();
        }

    }
}