eagle.dataproc.util.ConfigOptionParser.java Source code

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Here is the source code for eagle.dataproc.util.ConfigOptionParser.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 eagle.dataproc.util;

import org.apache.commons.cli.*;

import java.util.HashMap;
import java.util.Map;

public class ConfigOptionParser extends AbstractConfigOptionParser {
    private final static String CONFIG_OPT_FLAG = "D";

    @Override
    protected Parser parser() {
        return new BasicParser();
    }

    @Override
    protected Options options() {
        Options options = new Options();
        options.addOption(CONFIG_OPT_FLAG, true, "Config properties in format of \"-D key=value\"");
        return options;
    }

    @Override
    public Map<String, String> parseConfig(String[] arguments) throws ParseException {
        CommandLine cmd = parse(arguments);

        Map<String, String> result = new HashMap<>();
        if (cmd.hasOption(CONFIG_OPT_FLAG)) {
            String[] values = cmd.getOptionValues(CONFIG_OPT_FLAG);
            for (String value : values) {
                int eqIndex = value.indexOf("=");
                if (eqIndex > 0 && eqIndex < value.length()) {
                    String k = value.substring(0, eqIndex);
                    String v = value.substring(eqIndex + 1, value.length());
                    if (result.containsKey(k)) {
                        throw new ParseException("Duplicated " + CONFIG_OPT_FLAG + " " + value);
                    } else {
                        result.put(k, v);
                    }
                } else {
                    throw new ParseException("Invalid format: -" + CONFIG_OPT_FLAG + " " + value + ", required: -"
                            + CONFIG_OPT_FLAG + " key=value");
                }
            }
        }
        return result;
    }
}