com.github.rvesse.airline.examples.sendit.SendIt Maven / Gradle / Ivy

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Provides a variety of examples of using Airline

There is a newer version: 3.0.0

/**
 * Copyright (C) 2010-16 the original author or authors.
 *
 * 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.
 */
package com.github.rvesse.airline.examples.sendit;

import java.util.Arrays;

import com.github.rvesse.airline.Cli;
import com.github.rvesse.airline.examples.ExampleRunnable;
import com.github.rvesse.airline.help.Help;
import com.github.rvesse.airline.parser.ParseResult;
import com.github.rvesse.airline.parser.errors.ParseException;

public class SendIt {

    public static void main(String[] args) {
        Cli parser = new Cli(SendItCli.class);
        try {
            // Parse with a result to allow us to inspect the results of parsing
            ParseResult result = parser.parseWithResult(args);
            if (result.wasSuccessful()) {
                // Parsed successfully, so just run the command and exit
                System.exit(result.getCommand().run());
            } else {
                // Parsing failed
                // Display errors and then the help information
                System.err.println(String.format("%d errors encountered:", result.getErrors().size()));
                int i = 1;
                for (ParseException e : result.getErrors()) {
                    System.err.println(String.format("Error %d: %s", i, e.getMessage()));
                    i++;
                }
                
                System.err.println();
                
                Help.help(parser.getMetadata(), Arrays.asList(args), System.err);
            }
        } catch (Exception e) {
            // Errors should be being collected so if anything is thrown it is unexpected
            System.err.println(String.format("Unexpected error: %s", e.getMessage()));
            e.printStackTrace(System.err);
        }
        
        // If we got here we are exiting abnormally
        System.exit(1);
    }
}