org.apache.orc.tools.Driver.java Source code

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Here is the source code for org.apache.orc.tools.Driver.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
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * 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.orc.tools;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.OptionBuilder;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.apache.hadoop.conf.Configuration;
import org.apache.orc.tools.convert.ConvertTool;
import org.apache.orc.tools.json.JsonSchemaFinder;

import java.util.Map;
import java.util.Properties;

/**
 * Driver program for the java ORC utilities.
 */
public class Driver {

    @SuppressWarnings("static-access")
    static Options createOptions() {
        Options result = new Options();

        result.addOption(OptionBuilder.withLongOpt("help").withDescription("Print help message").create('h'));

        result.addOption(OptionBuilder.withLongOpt("define").withDescription("Set a configuration property")
                .hasArg().withValueSeparator().create('D'));
        return result;
    }

    static class DriverOptions {
        final CommandLine genericOptions;
        final String command;
        final String[] commandArgs;

        DriverOptions(String[] args) throws ParseException {
            genericOptions = new GnuParser().parse(createOptions(), args, true);
            String[] unprocessed = genericOptions.getArgs();
            if (unprocessed.length == 0) {
                command = null;
                commandArgs = new String[0];
            } else {
                command = unprocessed[0];
                if (genericOptions.hasOption('h')) {
                    commandArgs = new String[] { "-h" };
                } else {
                    commandArgs = new String[unprocessed.length - 1];
                    System.arraycopy(unprocessed, 1, commandArgs, 0, commandArgs.length);
                }
            }
        }
    }

    public static void main(String[] args) throws Exception {
        DriverOptions options = new DriverOptions(args);

        if (options.command == null) {
            System.err.println("ORC Java Tools");
            System.err.println();
            System.err.println("usage: java -jar orc-tools-*.jar [--help]" + " [--define X=Y] <command> <args>");
            System.err.println();
            System.err.println("Commands:");
            System.err.println("   meta - print the metadata about the ORC file");
            System.err.println("   data - print the data from the ORC file");
            System.err.println("   scan - scan the ORC file");
            System.err.println("   convert - convert JSON files to ORC");
            System.err.println("   json-schema - scan JSON files to determine their schema");
            System.err.println();
            System.err.println("To get more help, provide -h to the command");
            System.exit(1);
        }
        Configuration conf = new Configuration();
        Properties confSettings = options.genericOptions.getOptionProperties("D");
        for (Map.Entry pair : confSettings.entrySet()) {
            conf.set(pair.getKey().toString(), pair.getValue().toString());
        }
        if ("meta".equals(options.command)) {
            FileDump.main(conf, options.commandArgs);
        } else if ("data".equals(options.command)) {
            PrintData.main(conf, options.commandArgs);
        } else if ("scan".equals(options.command)) {
            ScanData.main(conf, options.commandArgs);
        } else if ("json-schema".equals(options.command)) {
            JsonSchemaFinder.main(conf, options.commandArgs);
        } else if ("convert".equals(options.command)) {
            ConvertTool.main(conf, options.commandArgs);
        } else {
            System.err.println("Unknown subcommand: " + options.command);
            System.exit(1);
        }
    }
}