com.cronutils.cli.CronUtilsCLI.java Source code

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Here is the source code for com.cronutils.cli.CronUtilsCLI.java

Source

package com.cronutils.cli;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.DefaultParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;

import com.cronutils.model.Cron;
import com.cronutils.model.CronType;
import com.cronutils.model.definition.CronDefinition;
import com.cronutils.model.definition.CronDefinitionBuilder;
import com.cronutils.parser.CronParser;

/*
 * Copyright 2017 bflorat, jmrozanec
 * Licensed 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.
 */
public class CronUtilsCLI {
    private static final String HELP = "help";

    private CronUtilsCLI() {
        super();
    }

    public static void main(String[] args) throws Exception {
        cronValidation(args);
    }

    private static void cronValidation(String[] args) throws ParseException {
        Options options = new Options();
        options.addOption("v", "validate", false, "Action of validation (default)");
        options.addOption("f", "format", true,
                "Cron expression format to validate. Possible values are: CRON4J, QUARTZ, UNIX");
        options.addOption("e", "expression", true, "Cron expression to validate. Example: '* 1 * * *'");
        options.addOption("h", HELP, false, "Help");

        String header = "Cron expressions validation by cron-utils\n\n";
        String footer = "\nPlease report issues at https://github.com/jmrozanec/cron-utils/issues";

        CommandLineParser parser = new DefaultParser();
        CommandLine cmd = parser.parse(options, args);
        if (cmd.hasOption(HELP) || cmd.getOptions().length == 0) {
            showHelp(options, header, footer);
            return;
        }
        if (!cmd.hasOption("validate")) {
            showHelp(options, header, footer);
            return;
        }
        if (cmd.hasOption('v')) {
            String format = cmd.getOptionValue("f");
            String expression = cmd.getOptionValue("e");

            CronType cronType = CronType.valueOf(format);
            CronDefinition cronDefinition = CronDefinitionBuilder.instanceDefinitionFor(cronType);
            CronParser cronParser = new CronParser(cronDefinition);
            Cron quartzCron = cronParser.parse(expression);
            quartzCron.validate();
        }
    }

    private static void showHelp(Options options, String header, String footer) {
        HelpFormatter formatter = new HelpFormatter();
        formatter.printHelp("cron-validator", header, options, footer, true);
    }
}