Usage.java

/*
 * The MIT License
 *
 * Copyright (c) 2013 Red Hat, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.jenkinsci.tools.configcloner.handler;

import java.io.PrintStream;

import org.jenkinsci.tools.configcloner.CommandResponse;
import org.jenkinsci.tools.configcloner.Main;
import org.kohsuke.args4j.CmdLineParser;

public class Usage implements Handler {

    private final Main main;

    public Usage(final Main main) {
        this.main = main;
    }

    public CommandResponse run(final CommandResponse response) {
        response.out().println("Usage: ");
        for(Handler handler: main.commandMapping().values()) {
            final PrintStream o = response.out();
            o.println();
            o.format("%-10s %s\n", handler.name(), handler.description());
            new CmdLineParser(handler).printUsage(o);
        }

        return response;
    }

    public String name() {
        return "help";
    }

    public String description() {
        return "Print usage";
    }
}